The Weald Basin ( / ˈ w iː l d / ) is a major topographic feature of the area that is now southern England and northern France from the Triassic to the Late Cretaceous . Its uplift in the Late Cretaceous marked the formation of the Wealden Anticline . The rock strata contain hydrocarbon deposits which have yielded coal, oil and gas.
150-580: The Weald Basin's formation commenced during the Carboniferous , with the rocks which are today basement deposited within a low swamp providing coals which were exploited to the north and east in Kent , but boreholes drilled in the 19th century failed to find this deposit in the area of the Weald. The Carboniferous coals may be overlain by early Triassic sediments. The sediments were uplifted and faulted within
300-431: A 100 kyr Milankovitch cycle , and so each cyclothem represents a cycle of sea level fall and rise over a 100 kyr period. Coal forms when organic matter builds up in waterlogged, anoxic swamps, known as peat mires, and is then buried, compressing the peat into coal. The majority of Earth's coal deposits were formed during the late Carboniferous and early Permian. The plants from which they formed contributed to changes in
450-814: A Lib Dem-Independent coalition ( Mid Sussex ) one was run by an Independent-Labour-Lib Dem-Green coalition ( Rother ) and one had a Lib Dem-Green coalition ( Wealden ). Conservative Katy Bourne is the Sussex Police and Crime Commissioner , having first been elected in 2012. In the 2016 referendum on UK membership of the EU , the people of Sussex voted to leave the EU by the narrowest of margins, by 50.23% to 49.77% or 4,413 votes. Headquartered in Lewes, Home Office policing in Sussex has been provided by Sussex Police since 1968. The first-tier Crown Court for all of Sussex
600-600: A blue background, blazoned as Azure , six martlets or . Recognised by the Flag Institute on 20 May 2011, its design is based on the heraldic shield of Sussex . The first-known recording of this emblem being used to represent the county was in 1611 when cartographer John Speed deployed it to represent the Kingdom of the South Saxons . However, it seems that Speed was repeating an earlier association between
750-537: A ceremonial county. Sussex is widely regarded as a single unified entity for some purposes, such as the environment, food and drink and sport . In 2007, Sussex Day was created to celebrate the county's culture and history . The name "Sussex" is derived from the Middle English Suth-sæxe , which is in turn derived from the Old English Sūþseaxe , meaning "(land or people) of
900-552: A complex fold structure which, in the event it was not eroded during uplift, attained a crestal elevation of 1400 m over what is today Ashdown Forest . However it is likely that erosion kept pace with uplift, resulting in large quantities of sediment supply to the North Sea and the English Channel Coal seams were discovered when test boring for an early proposal for a Channel Tunnel at Dover in 1890. This led to
1050-486: A defined GSSP. The fusulinid Aljutovella aljutovica can be used to define the base of the Moscovian across the northern and eastern margins of Pangea, however, it is restricted in geographic area, which means it cannot be used for global correlations. The first appearance of the conodonts Declinognathodus donetzianus or Idiognathoides postsulcatus have been proposed as a boundary marking species and potential sites in
1200-580: A formalised Carboniferous unit by William Conybeare and William Phillips in 1822 and then into the Carboniferous System by Phillips in 1835. The Old Red Sandstone was later considered Devonian in age. The similarity in successions between the British Isles and Western Europe led to the development of a common European timescale with the Carboniferous System divided into the lower Dinantian , dominated by carbonate deposition and
1350-509: A lesser scale, with several people being executed for their Catholic beliefs. In Elizabeth's reign, Sussex was open to the older Protestant forms practised in the Weald as well as the newer Protestant forms coming from Continental Europe; combined with a significant Catholic presence, Sussex was in many ways out of step with the rest of southern England. Sussex escaped the worst ravages of the English Civil War , although control of
1500-474: A major evolutionary radiation during the late Carboniferous. Vast swaths of forests and swamps covered the land, which eventually became the coal beds characteristic of the Carboniferous stratigraphy evident today. The later half of the period experienced glaciations , low sea level, and mountain building as the continents collided to form Pangaea . A minor marine and terrestrial extinction event,
1650-520: A period of rule by King Offa of Mercia , Sussex regained its independence but was annexed by Wessex around 827 and was fully absorbed into the crown of Wessex in 860, which later grew into the Kingdom of England. The Battle of Hastings was fought in Sussex, the victory that led to the Norman conquest of England . In September 1066, William of Normandy landed with his forces at Pevensey and erected
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#17327730788151800-409: A regional power. Shortly afterwards, Cædwalla returned to Sussex, killing its king and oppressing its people, putting them in what Bede called "a worse state of slavery". The South Saxon clergy were put under the control of West Saxon Winchester . Only around 715 was Eadberht of Selsey made the first bishop of the South Saxons , after which further invasion attempts from Wessex ensued. Following
1950-431: A shallow, tropical seaway which stretched from Southern California to Alaska. The boundary is within a cyclothem sequence of transgressive limestones and fine sandstones , and regressive mudstones and brecciated limestones. The Moscovian Stage is named after shallow marine limestones and colourful clays found around Moscow, Russia. It was first introduced by Sergei Nikitin in 1890. The Moscovian currently lacks
2100-645: A similar stratigraphy but divided it into two systems rather than one. These are the lower carbonate-rich sequence of the Mississippian System and the upper siliciclastic and coal-rich sequence of the Pennsylvanian . The United States Geological Survey officially recognised these two systems in 1953. In Russia, in the 1840s British and Russian geologists divided the Carboniferous into the Lower, Middle and Upper series based on Russian sequences. In
2250-451: A single sedimentary cycle, with an erosional surface at its base. Whilst individual cyclothems are often only metres to a few tens of metres thick, cyclothem sequences can be many hundreds to thousands of metres thick and contain tens to hundreds of individual cyclothems. Cyclothems were deposited along continental shelves where the very gentle gradient of the shelves meant even small changes in sea level led to large advances or retreats of
2400-648: A tropical wetland environment. Extensive coal deposits developed within the cyclothem sequences that dominated the Pennsylvanian sedimentary basins associated with the growing orogenic belt. Subduction of the Panthalassic oceanic plate along its western margin resulted in the Antler orogeny in the Late Devonian to Early Mississippian. Further north along the margin, slab roll-back , beginning in
2550-533: A turn for the worse with an increasing amount of them becoming unemployed, those in work faced their wages being forced down. Conditions became so bad that it was even reported to the House of Lords in 1830 that four harvest labourers (seasonal workers) had been found dead of starvation. The deteriorating conditions of work for the agricultural labourer eventually triggered riots, first in neighbouring Kent, and then in Sussex, where they lasted for several weeks, although
2700-423: A variety of methods for reconstructing past atmospheric oxygen levels, including the charcoal record, halite gas inclusions, burial rates of organic carbon and pyrite , carbon isotopes of organic material, isotope mass balance and forward modelling. Depending on the preservation of source material, some techniques represent moments in time (e.g. halite gas inclusions), whilst others have a wider time range (e.g.
2850-750: A warmer climate. This rapid rise in CO 2 may have been due to a peak in pyroclastic volcanism and/or a reduction in burial of terrestrial organic matter. The LPIA peaked across the Carboniferous-Permian boundary. Widespread glacial deposits are found across South America, western and central Africa, Antarctica, Australia, Tasmania, the Arabian Peninsula, India, and the Cimmerian blocks, indicating trans-continental ice sheets across southern Gondwana that reached to sea-level. In response to
3000-632: A wooden castle at Hastings , from which they raided the surrounding area. The battle was fought between Duke William of Normandy and the English king, Harold Godwinson , who had strong connections with Sussex and whose chief seat was probably in Bosham . After having marched his exhausted army 250 miles (400 km) from Yorkshire, Harold fought the Normans at the Battle of Hastings, where England's army
3150-525: Is Bewl Water on the Kent border, while the largest wholly within Sussex is Ardingly Reservoir . The coastal resorts of Sussex and neighbouring Hampshire are the sunniest places in the United Kingdom. The coast has consistently more sunshine than the inland areas: sea breezes, blowing off the sea, tend to clear any cloud from the coast. The sunshine average is approximately 1,900 hours a year; this
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#17327730788153300-436: Is Lewes Crown Court , which has courts in Lewes, Brighton and Hove. Like other first-tier Crown Courts it has its own resident High Court Judge . There is also a third-tier Crown Court at Chichester. The local prison in Sussex for men is Lewes Prison and there is also a Category D prison at Ford . A rape is a traditional territorial sub-division of Sussex, formerly used for various administrative purposes. Their origin
3450-596: Is 137 miles (220 km) long. The Kingdom of Sussex emerged in the 5th century; during Roman Britain the area was inhabited by the Regni tribe. In about 827, shortly after the Battle of Ellendun , Sussex was conquered by Wessex . From 860 it was ruled by the kings of Wessex , and in 927 it became part of the Kingdom of England . By the Norman period , Sussex was subdivided into six administrative districts known as rapes , which were themselves divided into hundreds . By
3600-706: Is a geologic period and system of the Paleozoic era that spans 60 million years from the end of the Devonian Period 358.9 Ma (million years ago) to the beginning of the Permian Period, 298.9 Ma. It is the fifth and penultimate period of the Paleozoic era and the fifth period of the Phanerozoic eon . In North America , the Carboniferous is often treated as two separate geological periods,
3750-489: Is celebrated annually on 16 June, the feast day of St Richard of Chichester , Sussex's patron saint , whose shrine at Chichester Cathedral was an important place of pilgrimage in the Middle Ages . Sussex's motto, We wunt be druv , is a Sussex dialect expression meaning "we will not be pushed around" and reflects the traditionally independent nature of Sussex men and women. The round-headed rampion , also known as
3900-606: Is difficult. The Tournaisian Stage is named after the Belgian city of Tournai . It was introduced in scientific literature by Belgian geologist André Dumont in 1832. The GSSP for the base of the Carboniferous System, Mississippian Subsystem and Tournaisian Stage is located at the La Serre section in Montagne Noire , southern France. It is defined by the first appearance of the conodont Siphonodella sulcata within
4050-628: Is much higher than the UK average of 1,340 hours a year. Most of Sussex lies in hardiness zone 8; the exception is the coastal plain west of Brighton, which lies in the milder zone 9. Rainfall is below average with the heaviest precipitation on the South Downs with 950 mm (37 in) of rainfall per year. The close proximity of Sussex to the Continent of Europe, results in cold spells in winter and hot, humid weather in summer. The climate of
4200-528: Is named after the Russian village of Gzhel , near Ramenskoye , not far from Moscow. The name and type locality were defined by Sergei Nikitin in 1890. The Gzhelian currently lacks a defined GSSP. The first appearance of the fusulinid Rauserites rossicus and Rauserites stuckenbergi can be used in the Boreal Sea and Paleo-Tethyan regions but not eastern Pangea or Panthalassa margins. Potential sites in
4350-631: Is that a delay between the development of trees with the wood fibre lignin and the subsequent evolution of lignin-degrading fungi gave a period of time where vast amounts of lignin-based organic material could accumulate. Genetic analysis of basidiomycete fungi, which have enzymes capable of breaking down lignin, supports this theory by suggesting this fungi evolved in the Permian. However, significant Mesozoic and Cenozoic coal deposits formed after lignin-digesting fungi had become well established, and fungal degradation of lignin may have already evolved by
4500-636: Is the 20th-century north–south development on the A23 - Brighton line corridor , Sussex's main link to London. Sussex's population is dominated by the Brighton/Worthing/Littlehampton conurbation that, with a population of over 470,000, is home to almost 1 in 3 of Sussex's population. According to the ONS urban area populations for continuous built-up areas, these are the five largest conurbations: The combined population of Sussex as of 2021
4650-583: Is the highest point in Sussex, or county top . With a height of 248 metres (814 ft) Ditchling Beacon is the highest point in East Sussex. At 113 kilometres (70 miles) long, the River Medway is the longest river flowing through Sussex. The longest river entirely in Sussex is the River Arun , which is 60 kilometres (37 mi) long. Sussex's largest lakes are man-made reservoirs. The largest
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4800-447: Is the period during which both terrestrial animal and land plant life was well established. Stegocephalia (four-limbed vertebrates including true tetrapods ), whose forerunners ( tetrapodomorphs ) had evolved from lobe-finned fish during the preceding Devonian period, became pentadactylous during the Carboniferous. The period is sometimes called the Age of Amphibians because of
4950-589: Is the possibility for the extraction of light tight oil (LTO) in Weald Basin and the average figure of 4.4 billion barrels (700 million cubic metres) is suggested. The overall range of estimations is from 2.2 to 8.6 billion barrels (350 to 1,370 million cubic metres). The data is said to have a "high degree of uncertainty", and the amount that could be produced is unknown, and could be zero. Carboniferous The Carboniferous ( / ˌ k ɑːr b ə ˈ n ɪ f ər ə s / KAR -bə- NIF -ər-əs )
5100-663: Is underway in the Urals and Nashui, Guizhou Province, southwestern China for a suitable site for the GSSP with the proposed definition for the base of the Serpukhovian as the first appearance of conodont Lochriea ziegleri . The Pennsylvanian was proposed by J.J.Stevenson in 1888, named after the widespread coal-rich strata found across the state of Pennsylvania. The closure of the Rheic Ocean and formation of Pangea during
5250-616: Is unknown, but they appear to predate the Norman Conquest Each rape was split into several hundreds and may be Romano-British or Anglo-Saxon in origin. At the time of the Norman Conquest, there were four rapes: Arundel, Lewes, Pevensey and Hastings. The rape of Bramber was created later in the 11th century and the rape of Chichester was created in the 13th century. Local government in Sussex has been subject to periodic review over time . Currently, Sussex
5400-503: The American Revolution . Known as 'the radical duke', Charles Lennox, 3rd Duke of Richmond , was an early supporter of parliamentary reform and US independence. Richard Cobden was a product of Sussex's rural radicalism, and became a campaigner for free trade and peace. Poet Percy Bysshe Shelley was another influential radical from Sussex. At the beginning of the 19th century agricultural labourers' conditions took
5550-589: The Bishop of Chichester and the Earl of Gloucester . These three were to elect a council of nine, to govern until a permanent settlement could be reached. During the Hundred Years' War , Sussex found itself on the frontline, convenient both for intended invasions and retaliatory expeditions by licensed French pirates. Hastings, Rye and Winchelsea were all burnt during this period and all three towns became part of
5700-462: The Carboniferous rainforest collapse , occurred at the end of the period, caused by climate change. Atmospheric oxygen levels, originally thought to be consistently higher than today throughout the Carboniferous, have been shown to be more variable, increasing from low levels at the beginning of the Period to highs of 25-30%. The development of a Carboniferous chronostratigraphic timescale began in
5850-489: The Catuvellauni , a tribe based around modern Hertfordshire. Much of Sussex was a Roman canton of the Regni , probably taking a similar area to the pre-Roman tribal area and kingdom. Its capital was at Noviomagus Reginorum , modern-day Chichester, close to the pre-Roman capital of the area, around Selsey. Sussex was home to the magnificent Roman Palace at Fishbourne , by far the largest Roman residence known north of
6000-619: The Cinque Ports , a loose federation for supplying ships for the country's security. Also at this time, Amberley and Bodiam castles were built to defend the upper reaches of navigable rivers. One of the impacts of the war and the Black Death , which killed around half of the population of Sussex, was the perceived injustice that led many Sussex people to participate in the Peasants' Revolt of 1381. Coastal areas suffered most from
6150-717: The Gulf of Mexico in the west to Turkey in the east. The orogeny was caused by a series of continental collisions between Laurussia, Gondwana and the Armorican Terrane Assemblage (much of modern-day Central and Western Europe including Iberia ) as the Rheic Ocean closed and Pangea formed. This mountain building process began in the Middle Devonian and continued into the early Permian. The Armorican terranes rifted away from Gondwana during
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6300-677: The Kuznetsk Basin . The northwest to eastern margins of Siberia were passive margins along the Mongol-Okhotsk Ocean on the far side of which lay Amuria. From the mid Carboniferous, subduction zones with associated magmatic arcs developed along both margins of the ocean. The southwestern margin of Siberia was the site of a long lasting and complex accretionary orogen. The Devonian to early Carboniferous Siberian and South Chinese Altai accretionary complexes developed above an east-dipping subduction zone, whilst further south,
6450-660: The London-Brabant Massif , but it is not clear whether this reflects a syn-rift origin for these rocks. The Weald basin gently subsided throughout the Jurassic, Cretaceous and Early Tertiary leading to a thick succession of sedimentary rocks being deposited. During the Early Jurassic a north and east shallowing mud-dominated shelf developed. As a result of the Alpine orogeny the basin was squeezed between
6600-586: The Magnitogorsk island arc , which lay between Kazakhstania and Laurussia in the Ural Ocean , collided with the passive margin of northeastern Laurussia ( Baltica craton ). The suture zone between the former island arc complex and the continental margin formed the Main Uralian Fault , a major structure that runs for more than 2,000 km along the orogen. Accretion of the island arc
6750-667: The Roman departure from Britain around 410 AD. The foundation legend of Sussex is provided by the Anglo-Saxon Chronicle , which states that in the year AD 477 Ælle landed with his three sons. Having fought on the banks of the Mearcredesburna , it seems Ælle secured the area between the Ouse and Cuckmere in a treaty. Traditionally this is thought to have been against native Britons, but it may have been to secure
6900-585: The South Saxons " (cf. Essex , Middlesex and Wessex ). The South Saxons were a Germanic tribe that settled in the region from the North German Plain during the 5th and 6th centuries. The earliest-known usage of the term South Saxons (Latin: Australes Saxones ) is in a royal charter of 689 which names them and their king, Noðhelm , although the term may well have been in use for some time before that. The monastic chronicler who wrote up
7050-554: The UK Parliament , Sussex is represented by 17 MPs. At the 2024 general election , 6 Labour and Labour Co-op MPs, 5 Conservative MPs, 5 Lib Dem MPs and 1 Green MP were elected from Sussex constituencies. Amongst top-tier local authorities, East and West Sussex County Councils are both held by the Conservatives and Brighton and Hove City Council is led by Labour. Amongst district councils, as of June 2024,
7200-417: The Variscan Orogeny , with the land now occupied by the Weald Basin being a low external fold belt to the main orogeny, which was located within the present day English Channel. The remnants of the mountain belt can be seen today in Devon and Cornwall in what is known as the Cornubian Massif. Unlike in Devon and Cornwall the deformation caused little or no metamorphism. The mountain belt collapsed soon after
7350-401: The Weald were all part of changes as significant to Sussex as those brought by the neolithic period, by the Romans and the Saxons. Sussex also experienced the most radical and thorough reorganisation of land in England. The county's existing sub-divisions, known as rapes, were made into castleries and each territory was given to one of William's most trusted barons. Castles were built to defend
7500-437: The ceremonial counties of East Sussex and West Sussex . The area borders the English Channel to the south, and the ceremonial counties of Surrey to the north, Kent to the north-east, and Hampshire to the west. Sussex contains the city of Brighton and Hove and its wider city region , as well as the South Downs National Park and the National Landscapes of the High Weald and Chichester Harbour . Its coastline
7650-511: The diversification of early amphibians such as the temnospondyls , which became dominant land vertebrates, as well as the first appearance of amniotes including synapsids (the clade to which modern mammals belong) and sauropsids (which include modern reptiles and birds) during the late Carboniferous. Land arthropods such as arachnids (e.g. trigonotarbids and Pulmonoscorpius ), myriapods (e.g. Arthropleura ) and especially insects (particularly flying insects ) also underwent
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#17327730788157800-445: The union with Scotland two members represented the county in the House of Commons of Great Britain from 1707 to 1800 and of the House of Commons of the United Kingdom from 1801 to 1832. The Reform Act 1832 led to the disenfranchisement of some of the smaller Sussex boroughs and divided what had been a single county constituency into eastern and western divisions, with two representatives elected for each division. The reforms of
7950-454: The "Pride of Sussex", was adopted as Sussex's county flower in 2002. The physical geography of Sussex relies heavily on its lying on the southern part of the Wealden anticline , the major features of which are the high lands that cross the county in a west to east direction: the Weald itself and the South Downs . Natural England has identified the following seven national character areas in Sussex: At 280 metres (920 feet), Blackdown
8100-566: The 17th century, after which it began to decline. It also brought widespread deforestation of parts of the Sussex Weald. Henry VIII 's separation of the Church of England from Rome and the dissolution of the monasteries led to the demolition of Lewes Priory and Battle Abbey and the sites being given to Henry's supporters. The shrine to St Richard at Chichester Cathedral was also destroyed. Mary I returned England to Catholicism and in Sussex 41 Protestants were burned to death . Under Elizabeth I , religious intolerance continued albeit on
8250-435: The 1890s these became the Dinantian, Moscovian and Uralian stages. The Serpukivian was proposed as part of the Lower Carboniferous, and the Upper Carboniferous was divided into the Moscovian and Gzhelian . The Bashkirian was added in 1934. In 1975, the ICS formally ratified the Carboniferous System, with the Mississippian and Pennsylvanian subsystems from the North American timescale, the Tournaisian and Visean stages from
8400-413: The 19th century made the electoral system more representative, but it was not until 1928 that there was universal suffrage. There was a strong radical and republican tradition in Sussex from the 19th century. For most of the 20th century Sussex was a Conservative Party stronghold—from the 1906 to 1997 general elections the only seats in Sussex won by parties other than the Conservatives were in
8550-419: The Alps. The Romans built villas, especially on the coastal plain and around Chichester, one of the best preserved being that at Bignor . Christianity first came to Sussex at this time, but faded away when the Romans left in the 5th century. The nationally important Patching hoard of Roman coins that was found in 1997 is the latest find of Roman coins found in Britain , probably deposited after 475 AD, well after
8700-444: The Ashdown Anticline, a large structure over 30 km long x 7 km wide, located in the centre of the Weald Basin in north Sussex ; significant quantities of natural gas were found but oil was absent. Oil and gas have subsequently been found at a number of sites in the Weald including Singleton and Storrington in West Sussex, Godstone and Lingfied in Surrey, and Cowden in Kent. In 2009 remaining recoverable oil reserves in
8850-467: The Bashkirian, the late Moscovian and the latest Kasimovian to mid-Gzhelian are inferred from the disappearance of glacial sediments, the appearance of deglaciation deposits and rises in sea levels. In the early Kasimovian there was short-lived (<1 million years) intense period of glaciation, with atmospheric CO 2 concentration levels dropping as low as 180 ppm. This ended suddenly as a rapid increase in CO 2 concentrations to c. 600 ppm resulted in
9000-672: The Black Death, and took longest to recover. Instead much economic activity in Sussex was focused on the Weald. Merchants moved north from the coastal towns and many Continental craftsmen, fleeing religious persecution, brought their expertise to the timber, iron, clothmaking and glass industries. Economic and social tensions continued for many years as Sussex people were also involved in Jack Cade 's rebellion of 1450, in which Cade may have been killed at Cade Street , near Heathfield. Demands grew more radical in Sussex in 1451 when John and William Merfold advocated rule by common people. They also demanded that Henry VI be deposed and publicly incited
9150-434: The Carboniferous Earth's atmosphere, and the coal fueled the Industrial Revolution . During the Pennsylvanian, vast amounts of organic debris accumulated in the peat mires that formed across the low-lying, humid equatorial wetlands of the foreland basins of the Central Pangean Mountains in Laurussia, and around the margins of the North and South China cratons. During glacial periods, low sea levels exposed large areas of
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#17327730788159300-429: The Carboniferous, the Tarim craton lay along the northwestern edge of North China. Subduction along the Kazakhstanian margin of the Turkestan Ocean resulted in collision between northern Tarim and Kazakhstania during the mid Carboniferous as the ocean closed. The South Tian Shan fold and thrust belt , which extends over 2,000 km from Uzbekistan to northwest China, is the remains of this accretionary complex and forms
9450-438: The Early Mississippian, led to the rifting of the Yukon-Tanana terrane and the opening of the Slide Mountain Ocean . Along the northern margin of Laurussia, orogenic collapse of the Late Devonian to Early Mississippian Innuitian orogeny led to the development of the Sverdrup Basin . Much of Gondwana lay in the southern polar region during the Carboniferous. As the plate moved, the South Pole drifted from southern Africa in
9600-461: The Early to Middle Mississippian, carbonate production occurred to depth across the gently dipping continental slopes of Laurussia and North and South China ( carbonate ramp architecture) and evaporites formed around the coastal regions of Laurussia, Kazakhstania, and northern Gondwana. From the late Visean, the cooling climate restricted carbonate production to depths of less than c. 10 m forming carbonate shelves with flat-tops and steep sides. By
9750-437: The ICS ratify global stages based on a Global Boundary Stratotype Section and Point (GSSP) from a single formation (a stratotype ) identifying the lower boundary of the stage. Only the boundaries of the Carboniferous System and three of the stage bases are defined by global stratotype sections and points because of the complexity of the geology. The ICS subdivisions from youngest to oldest are as follows: The Mississippian
9900-432: The Kasimovian covers a period of globally low sea level, which has resulted in disconformities within many sequences of this age. This has created difficulties in finding suitable marine fauna that can used to correlate boundaries worldwide. The Kasimovian currently lacks a defined GSSP; potential sites in the southern Urals, southwest USA and Nashui, Guizhou Province, southwestern China are being considered. The Gzhelian
10050-418: The Late Ordovician . As they drifted northwards the Rheic Ocean closed in front of them, and they began to collide with southeastern Laurussia in the Middle Devonian. The resulting Variscan orogeny involved a complex series of oblique collisions with associated metamorphism , igneous activity, and large-scale deformation between these terranes and Laurussia, which continued into the Carboniferous. During
10200-401: The Late Pennsylvanian, deformation along the Alleghanian orogen became northwesterly-directed compression . The Uralian orogeny is a north–south trending fold and thrust belt that forms the western edge of the Central Asian Orogenic Belt . The Uralian orogeny began in the Late Devonian and continued, with some hiatuses, into the Jurassic . From the Late Devonian to early Carboniferous,
10350-427: The Lib Dems had a majority in three local authorities ( Chichester , Eastbourne and Horsham ) and the Labour Party had a majority in three local authorities ( Adur , Crawley and Worthing ). Of the six local authorities in no overall control , one had a minority Green administration ( Hastings ), one was run by a Lib Dem-Labour-Green coalition ( Arun ), one was run by a Green-Labour coalition ( Lewes ), one as run by
10500-403: The Moscovian, the waxing and waning of the ice sheets led to cyclothem deposition with mixed carbonate-siliciclastic sequences deposited on continental platforms and shelves. Sussex Sussex ( /ˈsʌsɪks/ ; from the Old English Sūþseaxe ; lit. ' South Saxons '; 'Sussex') is an area within South East England which was historically a kingdom and, later, a county . It includes
10650-441: The Paleo-Tethys to the southwest and Panthalassa to the northeast. Cyclothem sediments with coal and evaporites were deposited across the passive margins that surrounded both continents. The Carboniferous climate was dominated by the Late Paleozoic Ice Age (LPIA), the most extensive and longest icehouse period of the Phanerozoic, which lasted from the Late Devonian to the Permian (365 Ma-253 Ma). Temperatures began to drop during
10800-538: The Pennsylvanian, cyclothems were deposited in shallow, epicontinental seas across the tropical regions of Laurussia (present day western and central US, Europe, Russia and central Asia) and the North and South China cratons . The rapid sea levels fluctuations they represent correlate with the glacial cycles of the Late Paleozoic Ice Age. The advance and retreat of ice sheets across Gondwana followed
10950-465: The Pennsylvanian, together with widespread glaciation across Gondwana led to major climate and sea level changes, which restricted marine fauna to particular geographic areas thereby reducing widespread biostratigraphic correlations. Extensive volcanic events associated with the assembling of Pangea means more radiometric dating is possible relative to the Mississippian. The Bashkirian Stage
11100-426: The Period. This was not a steady rise, but included peaks and troughs reflecting the dynamic climate conditions of the time. How the atmospheric oxygen concentrations influenced the large body size of arthropods and other fauna and flora during the Carboniferous is also a subject of ongoing debate. The changing climate was reflected in regional-scale changes in sedimentation patterns. In the relatively warm waters of
11250-485: The Permian. The Kazakhstanian microcontinent is composed of a series of Devonian and older accretionary complexes. It was strongly deformed during the Carboniferous as its western margin collided with Laurussia during the Uralian orogen and its northeastern margin collided with Siberia. Continuing strike-slip motion between Laurussia and Siberia led the formerly elongate microcontinent to bend into an orocline . During
11400-638: The Roman army under Julius Caesar that temporarily occupied south-eastern Britain in 55 BC. Soon after the first Roman invasion had ended, the Celtic Regni tribe under their leader Commius initially occupied the Manhood Peninsula . Eppillus , Verica and Cogidubnus followed Commius as rulers of the Regni or southern Atrebates, a region which included most of Sussex, with their capital in
11550-574: The Selsey area. A number of archaeologists now think there is a strong possibility that the Roman invasion of Britain in AD 43 started around Fishbourne and Chichester Harbour rather than the traditional landing place of Richborough in Kent. According to this theory, the Romans were called to restore the refugee Verica , a king whose capital was in the Selsey and Chichester area, who had been driven out by
11700-523: The Sussex Downs were the location of the Battle of Lewes , in which Simon de Montfort and his fellow barons captured Prince Edward (later Edward I ), the son and heir of Henry III . The subsequent treaty, known as the Mise of Lewes , led to Montfort summoning the first parliament in English history without any prior royal authorisation. A provisional administration was set up, consisting of Montfort,
11850-555: The Urals and Nashui, Guizhou Province, southwestern China are being considered. The Kasimovian is the first stage in the Upper Pennsylvanian. It is named after the Russian city of Kasimov , and was originally included as part of Nikitin's 1890 definition of the Moscovian. It was first recognised as a distinct unit by A.P. Ivanov in 1926, who named it the " Tiguliferina " Horizon after a type of brachiopod . The boundary of
12000-498: The Urals and Nashui, Guizhou Province, southwestern China for the GSSP are being considered. The GSSP for the base of the Permian is located in the Aidaralash River valley near Aqtöbe , Kazakhstan and was ratified in 1996. The beginning of the stage is defined by the first appearance of the conodont Streptognathodus postfusus . A cyclothem is a succession of non-marine and marine sedimentary rocks , deposited during
12150-467: The Visean of c. 15.3%, although with large uncertainties; and, pyrite records suggest levels of c. 15% early in the Carboniferous, to over 25% during the Pennsylvanian, before dropping back below 20% towards the end. However, whilst exact numbers vary, all models show an overall increase in atmospheric oxygen levels from a low of between 15-20% at the beginning of the Carboniferous to highs of 25-30% during
12300-548: The Weald Basin were estimated at one and a half million tonnes. In 2010 the Weald Basin contributed 18% of onshore gas and less than 5% of onshore oil production in the UK. As of August 2013 there was significant opposition to hydraulic fracturing developing in southeast England centred on Balcombe where an exploratory well was planned and the Balcombe drilling protest was in progress. A BGS/ Department for Energy and Climate Change (DECC) report from May 2014 suggest that there
12450-495: The Wealden iron industry was strategically important to both sides. In 1642 there was a skirmish at Haywards Heath when Royalists marching towards Lewes were intercepted by local Parliamentarians . The Royalists were routed with around 200 killed or taken prisoner. Shortly after there were sieges at Chichester and Arundel , and a smaller battle at Bramber Bridge . Despite its being under Parliamentarian control, Charles II
12600-598: The Western European and the Serpukhovian, Bashkirian, Moscovian, Kasimovian and Gzhelian from the Russian. With the formal ratification of the Carboniferous System, the Dinantian, Silesian, Namurian, Westphalian and Stephanian became redundant terms, although the latter three are still in common use in Western Europe. Stages can be defined globally or regionally. For global stratigraphic correlation,
12750-522: The Zharma-Saur arc formed along the northeastern margin of Kazakhstania. By the late Carboniferous, all these complexes had accreted to the Siberian craton as shown by the intrusion of post-orogenic granites across the region. As Kazakhstania had already accreted to Laurussia, Siberia was effectively part of Pangea by 310 Ma, although major strike-slip movements continued between it and Laurussia into
12900-590: The area east of the Saxon Shore fort of Anderida from the influence of the Kingdom of Kent, with whom the South Saxons may have had occasional disputes. Ælle was recognised as the first ' Bretwalda ' or overlord of southern Britain. He was probably the most senior of the Anglo-Saxon kings and led the ill-fated campaign against King Arthur at Mount Badon . By the 7th century, South Saxon kings were ruling from sites around Selsey (the pre-Roman capital of
13050-409: The area) and Chichester (the Roman capital of the area) initially with similar borders to the pre-Roman kingdom and Roman canton. For much of the 7th and 8th centuries, Sussex suffered attempts at invasion from the Kingdom of Wessex to its west. King Æðelwealh formed an alliance with Christian Mercia against Wessex, becoming Sussex's first Christian king. With support from St Wilfrid , Sussex became
13200-456: The armistice to be offered to Germany at the end of World War I were agreed at a meeting at Danny House , Hurstpierpoint . With the declaration of World War II , Sussex found itself part of the country's frontline with its airfields playing a key role in the Battle of Britain and with its towns being some of the most frequently bombed. Sussex was garrisoned by multiple British and Canadian Army units from 1940 until at least May 1942. During
13350-668: The average temperature in the tropics c. 24 °C (75 °F) and in polar regions c. -23 °C (-10 °F), whilst during the Early Tournaisian Warm Interval (358-353 Ma) the GAT was c. 22 °C (72 °F), the tropics c. 30 °C (86 °F) and polar regions c. 1.5 °C (35 °F). Overall, for the Ice Age the GAT was c. 17 °C (62 °F), with tropical temperatures c. 26 °C and polar temperatures c. -9.0 °C (16 °F). There are
13500-759: The basement to the north and the south, this resulted in the reactivation of the formerly normal faults into minor thrusts (as they had been during the Variscan Orogeny ) and the formation of the Wealden Anticline . The region's two surface structural highs (areas of crust and rocks which are uplifted), the Wealden Anticline and the Channel High, are superimposed upon earlier, Mesozoic basins, (the Weald and Channel basins). This nearly exact superimposition of compressional features upon underlying formerly extensional features exemplifies perfectly
13650-726: The boundary, is not seen at the La Serre site making precise correlation difficult. The Viséan Stage was introduced by André Dumont in 1832 and is named after the city of Visé , Liège Province , Belgium. In 1967, the base of the Visean was officially defined as the first black limestone in the Leffe facies at the Bastion Section in the Dinant Basin . These changes are now thought to be ecologically driven rather than caused by evolutionary change, and so this has not been used as
13800-412: The breadline and receiving regular relief. Socially acceptable crimes, including protest, riot, collective action and smuggling were commonplace in Sussex and were seen by many as a legitimate way to address grievances and assert freedoms. At this time, Sussex became a centre for radicalism . Thomas Paine developed his political ideas in Lewes, and later wrote Common Sense which was influential in
13950-527: The ceremonial counties of East and West Sussex in 1974. Boundaries were changed and a large part of the rape of Lewes was transferred from the eastern division into West Sussex, along with Gatwick Airport, historically part of the county of Surrey. From 1290, Sussex returned two Members of Parliament to the House of Commons of the Parliament of England . Each county returned two MPs and each borough designated by Royal charter also returned two MPs. After
14100-410: The charcoal record and pyrite). Results from these different methods for the Carboniferous vary. For example: the increasing occurrence of charcoal produced by wildfires from the Late Devonian into the Carboniferous indicates increasing oxygen levels, with calculations showing oxygen levels above 21% for most of the Carboniferous; halite gas inclusions from sediments dated 337-335 Ma give estimates for
14250-440: The coastal districts is strongly influenced by the sea, which, because of its tendency to warm up slower than land, can result in cooler temperatures than inland in the summer. In the autumn months, the coast sometimes has higher temperatures. Rainfall during the summer months is mainly from thunderstorms and thundery showers; from January to March the heavier rainfall is due to prevailing south-westerly frontal systems. In winter,
14400-522: The constituencies of Brighton and Brighton Kemptown . Since 1997 there has been a gradual shift to the left, especially in more urban areas. This has been most notable in Brighton and Hove, where in Brighton Pavilion the UK's first Green MP, Caroline Lucas , was elected in 2010 and the UK's first Green-led local authority was elected in 2011. In the House of Commons , the lower house of
14550-437: The continental shelves. Major river channels, up to several kilometres wide, stretched across these shelves feeding a network of smaller channels, lakes and peat mires. These wetlands were then buried by sediment as sea levels rose during interglacials . Continued crustal subsidence of the foreland basins and continental margins allowed this accumulation and burial of peat deposits to continue over millions of years resulting in
14700-529: The county. The population of Sussex was 550,446 in 1891 and 605,202 in 1901. Finds at Eartham Pit in Boxgrove show that the area has some of the earliest hominid remains in Europe, dating back some 500,000 years and known as Boxgrove Man or Homo heidelbergensis . At a site near Pulborough called The Beedings, tools have been found that date from around 35,000 years ago and that are thought to be from either
14850-551: The development of four deep mines in the Kent Coalfield in the early 20th century. The Weald Basin has yielded significant quantities of gypsum from Jurassic Purbeck beds and a number of brickworks exploit the lower Cretaceous clays. The inversion of the Weald Basin throughout the late Cretaceous and early Tertiary resulted in the formation of the Wealden Anticline and a number of smaller anticlines within
15000-542: The earlier Mississippian and the later Pennsylvanian . The name Carboniferous means " coal -bearing", from the Latin carbō (" coal ") and ferō ("bear, carry"), and refers to the many coal beds formed globally during that time. The first of the modern "system" names, it was coined by geologists William Conybeare and William Phillips in 1822, based on a study of the British rock succession. Carboniferous
15150-475: The early Carboniferous Kanimblan Orogeny . Continental arc magmatism continued into the late Carboniferous and extended round to connect with the developing proto-Andean subduction zone along the western South American margin of Gondwana. Shallow seas covered much of the Siberian craton in the early Carboniferous. These retreated as sea levels fell in the Pennsylvanian and as the continent drifted north into more temperate zones extensive coal deposits formed in
15300-599: The early Carboniferous in North China. However, bauxite deposits immediately above the regional mid Carboniferous unconformity indicate warm tropical conditions and are overlain by cyclothems including extensive coals. South China and Annamia (Southeast Asia) rifted from Gondwana during the Devonian. During the Carboniferous, they were separated from each other and North China by the Paleoasian Ocean with
15450-632: The early Carboniferous to eastern Antarctica by the end of the period. Glacial deposits are widespread across Gondwana and indicate multiple ice centres and long-distance movement of ice. The northern to northeastern margin of Gondwana (northeast Africa, Arabia, India and northeastern West Australia) was a passive margin along the southern edge of the Paleo-Tethys with cyclothem deposition including, during more temperate intervals, coal swamps in Western Australia. The Mexican terranes along
15600-523: The east winds can be as cold as further inland. Selsey is known as a tornado hotspot, with small tornadoes hitting the town in 1986, 1998 and 2000, with the 1998 tornado causing an estimated £10 million of damage to 1,000 buildings. Most of Sussex's population is distributed in an east–west line along the English Channel coast or on the east–west line of the A272 . The exception to this pattern
15750-754: The eastern Mediterranean. Sussex is rich in remains from the Bronze and Iron Ages , in particular the Bronze Age barrows known as the Devil's Jumps and Cissbury Ring , one of Britain's largest hillforts. Towards the end of the Iron Age in 75 BC people from the Atrebates , one of the tribes of the Belgae , a mix of Celtic and German stock, invaded and occupied southern Britain. This was followed by an invasion by
15900-500: The emblem and the county, rather than being the inventor of the association. It is now firmly regarded that the county emblem originated and derived from the coat of arms of the 14th-century Knight of the Shire , Sir John de Radynden . Sussex's six martlets are today held to symbolise the traditional six sub-divisions of the county known as rapes . Sussex by the Sea is regarded as
16050-539: The end of the Carboniferous, extension and rifting across the northern margin of Gondwana led to the breaking away of the Cimmerian Terrane during the early Permian and the opening of the Neo-Tethys Ocean . Along the southeastern and southern margin of Gondwana (eastern Australia and Antarctica), northward subduction of Panthalassa continued. Changes in the relative motion of the plates resulted in
16200-455: The end of the Devonian, even if the specific enzymes used by basidiomycetes had not. The second theory is that the geographical setting and climate of the Carboniferous were unique in Earth's history: the co-occurrence of the position of the continents across the humid equatorial zone, high biological productivity, and the low-lying, water-logged and slowly subsiding sedimentary basins that allowed
16350-586: The entry classifying the invasion seems to have got his dates wrong; recent scholars have suggested he might have been a quarter of a century too late. In the Domesday Book of 1086, Sussex is recorded as Sudsexe . Three United States counties (in Delaware , New Jersey and Virginia ), and a former county/land division of Western Australia , are named after Sussex. The flag of Sussex consists of six gold martlets , or heraldic swallows , on
16500-458: The evolutionary lineage from Siphonodella praesulcata to Siphonodella sulcata . This was ratified by the ICS in 1990. However, in 2006 further study revealed the presence of Siphonodella sulcata below the boundary, and the presence of Siphonodella praesulcata and Siphonodella sulcata together above a local unconformity . This means the evolution of one species to the other, the definition of
16650-480: The formation of thick and widespread coal formations. During the warm interglacials, smaller coal swamps with plants adapted to the temperate conditions formed on the Siberian craton and the western Australian region of Gondwana. There is ongoing debate as to why this peak in the formation of Earth's coal deposits occurred during the Carboniferous. The first theory, known as the delayed fungal evolution hypothesis,
16800-463: The killing of the nobility and clergy. The Wealden iron industry expanded rapidly, especially after the first blast furnace arrived in Sussex in 1496, from the Low Countries , which greatly improved efficiency. Skilled Flemish workers moved to Sussex, followed again by Huguenot craftsmen from France, who brought new techniques. The industry was strategically important and flourished into
16950-554: The larger structure. The discovery in 1897 of natural gas while drilling for water at Heathfield railway station provided fuel for the first natural gas lighting in the United Kingdom. The existence of the same strata within the Weald basin which are the source rocks for the Wytch Farm oilfield in Dorset led to an interest in the petroleum potential of the Wealden anticline, with exploration taking place on Ashdown forest examining
17100-405: The last Neanderthals in northern Europe or pioneer populations of modern humans. The thriving population lived by hunting game such as horses, bison, mammoths and woolly rhinos . Around 6000 BC the ice sheet over the North Sea melted, sea levels rose and the meltwaters burst south and westwards, creating the English Channel and cutting the people of Sussex off from their Mesolithic kinsmen to
17250-457: The last major Anglo Saxon kingdom to become Christian. South Saxon and Mercian forces took control of what is now east Hampshire and the Isle of Wight. Cædwalla of Wessex killed Æðelwealh and "ravaged Sussex by fierce slaughter and devastation". The South Saxons forced Cædwalla from Sussex and were able to lead a campaign into Kent , replacing its king. At this time Sussex could have re-emerged into
17400-563: The late 18th century. The term "Carboniferous" was first used as an adjective by Irish geologist Richard Kirwan in 1799 and later used in a heading entitled "Coal-measures or Carboniferous Strata" by John Farey Sr. in 1811. Four units were originally ascribed to the Carboniferous, in ascending order, the Old Red Sandstone , Carboniferous Limestone , Millstone Grit and the Coal Measures . These four units were placed into
17550-505: The late Devonian with a short-lived glaciation in the late Famennian through Devonian–Carboniferous boundary, before the Early Tournaisian Warm Interval. Following this, a reduction in atmospheric CO 2 levels, caused by the increased burial of organic matter and widespread ocean anoxia led to climate cooling and glaciation across the south polar region. During the Visean Warm Interval glaciers nearly vanished retreating to
17700-638: The lead up to the Dieppe Raid and D-Day landings, the people of Sussex were witness to the buildup of military personnel and materials, including the assembly of landing crafts and construction of Mulberry harbours off the county's coast. In the post-war era, the New Towns Act 1946 designated Crawley as the site of a new town . As part of the Local Government Act 1972 , the eastern and western divisions of Sussex were made into
17850-521: The location for the GSSP. Instead, the GSSP for the base of the Visean is located in Bed 83 of the sequence of dark grey limestones and shales at the Pengchong section, Guangxi , southern China. It is defined by the first appearance of the fusulinid Eoparastaffella simplex in the evolutionary lineage Eoparastaffella ovalis – Eoparastaffella simplex and was ratified in 2009. The Serpukhovian Stage
18000-432: The majority of a cyclothem sequence occurred during falling sea levels, when rates of erosion were high, meaning they were often periods of non-deposition. Erosion during sea level falls could also result in the full or partial removal of previous cyclothem sequences. Individual cyclothems are generally less than 10 m thick because the speed at which sea level rose gave only limited time for sediments to accumulate. During
18150-743: The mid Carboniferous, the South American sector of Gondwana collided obliquely with Laurussia's southern margin resulting in the Ouachita orogeny. The major strike-slip faulting that occurred between Laurussia and Gondwana extended eastwards into the Appalachian Mountains where early deformation in the Alleghanian orogeny was predominantly strike-slip. As the West African sector of Gondwana collided with Laurussia during
18300-515: The northwestern Gondwana margin, were affected by the subduction of the Rheic Ocean. However, they lay to west of the Ouachita orogeny and were not impacted by continental collision but became part of the active margin of the Pacific. The Moroccan margin was affected by periods of widespread dextral strike-slip deformation, magmatism and metamorphism associated with the Variscan orogeny. Towards
18450-399: The orogeny, leading to the former northward thrusts to be reactivated as normal faults, and led to the formation of the Weald basin, which developed as an extension of the considerably larger Wessex Basin . Reconstructions of the geometry of the early fault systems in the Weald Basin reveal that for the early history of the basin a series of steep normal faults to the north were active against
18600-426: The peat mires. As fully marine conditions were established, limestones succeeded these marginal marine deposits. The limestones were in turn overlain by deep water black shales as maximum sea levels were reached. Ideally, this sequence would be reversed as sea levels began to fall again; however, sea level falls tend to be protracted, whilst sea level rises are rapid, ice sheets grow slowly but melt quickly. Therefore,
18750-500: The principles of structural inversion across a large and well defined geologic feature. The overall uplift produced by the Tertiary inversion in the eastern Wealden basin has been estimated to be as much as 1525 m; which as a result of the large amount of Mesozoic sediments does not reveal the underlying Paleozoic basement. Utilising estimations of the original thickness of Chalk (400–460 m) and other Mesozoic strata indicate
18900-892: The proto-Andes in Bolivia and western Argentina and the Pan-African mountain ranges in southeastern Brazil and southwest Africa. The main phase of the LPIA (c. 335-290 Ma) began in the late Visean, as the climate cooled and atmospheric CO 2 levels dropped. Its onset was accompanied by a global fall in sea level and widespread multimillion-year unconformities. This main phase consisted of a series of discrete several million-year-long glacial periods during which ice expanded out from up to 30 ice centres that stretched across mid- to high latitudes of Gondwana in eastern Australia, northwestern Argentina, southern Brazil, and central and Southern Africa. Isotope records indicate this drop in CO 2 levels
19050-640: The sea. Cyclothem lithologies vary from mudrock and carbonate-dominated to coarse siliciclastic sediment-dominated sequences depending on the paleo-topography, climate and supply of sediments to the shelf. The main period of cyclothem deposition occurred during the Late Paleozoic Ice Age from the Late Mississippian to early Permian, when the waxing and waning of ice sheets led to rapid changes in eustatic sea level . The growth of ice sheets led global sea levels to fall as water
19200-526: The sixteenth century, the eastern three rapes and the western three rapes had been combined for most meetings of the court of quarter sessions , a division which was reinforced when the administrative counties of East Sussex and West Sussex were established in 1889. Subsequent local government reforms maintained the division into east and west. The county retained a single lord lieutenant and sheriff until 1974, when they were replaced with separate posts for East and West Sussex and Sussex lost its status as
19350-591: The south. Later in the Neolithic period, the area of the South Downs above Worthing was one of Britain's largest and most important flint -mining centres. The flints were used to help fell trees for agriculture. The oldest of these mines, at Church Hill in Findon, has been carbon-dated to 4500 BC to 3750 BC, making it one of the earliest known mines in Britain. Flint tools from Cissbury have been found as far away as
19500-504: The suture between Kazakhstania and Tarim. A continental magmatic arc above a south-dipping subduction zone lay along the northern North China margin, consuming the Paleoasian Ocean. Northward subduction of the Paleo-Tethys beneath the southern margins of North China and Tarim continued during the Carboniferous, with the South Qinling block accreted to North China during the mid to late Carboniferous. No sediments are preserved from
19650-542: The territories including at Arundel, Bramber, Lewes, Pevensey and Hastings. Sussex's bishop, Æthelric II , was deposed and imprisoned and replaced with William the Conqueror's personal chaplain, Stigand . The Normans also built Chichester Cathedral and moved the seat of Sussex's bishopric from Selsey to Chichester. The Normans also founded new towns in Sussex, including New Shoreham (the centre of modern Shoreham-by-Sea), Battle, Arundel, Uckfield and Winchelsea. In 1264,
19800-410: The thick accumulation of peat were sufficient to account for the peak in coal formation. During the Carboniferous, there was an increased rate in tectonic plate movements as the supercontinent Pangea assembled. The continents themselves formed a near circle around the opening Paleo-Tethys Ocean, with the massive Panthalassic Ocean beyond. Gondwana covered the south polar region. To its northwest
19950-602: The unofficial anthem of Sussex; it was composed by William Ward-Higgs in 1907, perhaps originally from the lyrics of Rudyard Kipling 's poem entitled Sussex . Adopted by the Royal Sussex Regiment and popularised in World War I , it is sung at celebrations across the county, including those at Lewes Bonfire , and at sports matches, including those of Brighton and Hove Albion Football Club and Sussex County Cricket Club . The county day, called Sussex Day ,
20100-511: The unrest continued until 1832 and became known as the Swing Riots . During World War I , on 30 June 1916, the Royal Sussex Regiment took part in the Battle of the Boar's Head at Richebourg-l'Avoué . The day subsequently became known as The Day Sussex Died . Within five hours the 17 officers and 349 men were killed, and 1,000 men were wounded or taken prisoner. In 1918 the terms of
20250-399: The uplift and erosion of the more mafic basement rocks of the Central Pangea Mountains at this time, CO 2 levels dropped as low as 175 ppm and remained under 400 ppm for 10 Ma. Temperatures across the Carboniferous reflect the phases of the LPIA. At the extremes, during the Permo-Carboniferous Glacial Maximum (299-293 Ma) the global average temperature (GAT) was c. 13 °C (55 °F),
20400-421: The upper Silesian with mainly siliciclastic deposition. The Dinantian was divided into the Tournaisian and Viséan stages. The Silesian was divided into the Namurian , Westphalian and Stephanian stages. The Tournaisian is the same length as the International Commission on Stratigraphy (ICS) stage, but the Viséan is longer, extending into the lower Serpukhovian . North American geologists recognised
20550-437: Was Laurussia. These two continents slowly collided to form the core of Pangea. To the north of Laurussia lay Siberia and Amuria . To the east of Siberia, Kazakhstania , North China and South China formed the northern margin of the Paleo-Tethys, with Annamia laying to the south. The Central Pangean Mountains were formed during the Variscan - Alleghanian - Ouachita orogeny. Today their remains stretch over 10,000 km from
20700-529: Was able to journey through the county after the Battle of Worcester in 1651 to make his escape to France from the port of Shoreham. In 1681 Charles II granted William Penn lands in what became Pennsylvania and Delaware . Amongst those whom he carried to North America as colonists were 200 people from Sussex, mostly Quakers, who founded settlements named after places in Sussex including Lewes and Seaford in Sussex County , Delaware and Horsham Township and Chichester in Pennsylvania. The Sussex coast
20850-436: Was about 1.7 million. In 2021, Sussex had a population density of 451 per km , higher than the average for England of 434 per km . The decline of the Sussex ironworks probably accounts for the small increase in population during several centuries, although after the Massacre of St Bartholomew upwards of 1,500 Huguenots landed at Rye, and in 1685, after the revocation of the Edict of Nantes , many more refugees were added to
21000-447: Was complete by the Tournaisian, but subduction of the Ural Ocean between Kazakhstania and Laurussia continued until the Bashkirian when the ocean finally closed and continental collision began. Significant strike-slip movement along this zone indicates the collision was oblique. Deformation continued into the Permian and during the late Carboniferous and Permian the region was extensively intruded by granites . The Laurussian continent
21150-415: Was defeated and Harold was killed. It is likely that all the fighting men of Sussex were at the battle, as the county's thegns were decimated and any that survived had their lands confiscated. William built Battle Abbey at the site of the battle, with the exact spot where Harold fell marked by the high altar. Sussex experienced some of the greatest changes of any English county under the Normans, for it
21300-447: Was formed by the collision between Laurentia , Baltica and Avalonia during the Devonian. At the beginning of the Carboniferous, some models show it at the equator, whilst others place it further south. In either case, the continent drifted northwards, reaching low latitudes in the northern hemisphere by the end of the Period. The Central Pangean Mountain drew in moist air from the Paleo-Tethys Ocean resulting in heavy precipitation and
21450-410: Was greatly modified by the social movement of sea bathing for health which became fashionable among the wealthy in the second half of the 18th century. Resorts developed all along the coast, including at Brighton, Hastings, Worthing, and Bognor. Poverty increased and by 1801 Sussex had the highest poor law rates in England, with 23 per cent of its population (37,000 people out of 160,000) living on
21600-646: Was lock away in glaciers. Falling sea levels exposed large tracts of the continental shelves across which river systems eroded channels and valleys and vegetation broke down the surface to form soils . The non-marine sediments deposited on this erosional surface form the base of the cyclothem. As sea levels began to rise, the rivers flowed through increasingly water-logged landscapes of swamps and lakes. Peat mires developed in these wet and oxygen-poor conditions, leading to coal formation. With continuing sea level rise, coastlines migrated landward and deltas , lagoons and esturaries developed; their sediments deposited over
21750-510: Was proposed by Alexander Winchell in 1870 named after the extensive exposure of lower Carboniferous limestone in the upper Mississippi River valley. During the Mississippian, there was a marine connection between the Paleo-Tethys and Panthalassa through the Rheic Ocean resulting in the near worldwide distribution of marine faunas and so allowing widespread correlations using marine biostratigraphy . However, there are few Mississippian volcanic rocks , and so obtaining radiometric dates
21900-450: Was proposed by Russian stratigrapher Sofia Semikhatova in 1934. It was named after Bashkiria , the then Russian name of the republic of Bashkortostan in the southern Ural Mountains of Russia. The GSSP for the base of the Pennsylvanian Subsystem and Bashkirian Stage is located at Arrow Canyon in Nevada , US and was ratified in 1996. It is defined by the first appearance of the conodont Declinognathodus noduliferus . Arrow Canyon lay in
22050-505: Was proposed in 1890 by Russian stratigrapher Sergei Nikitin . It is named after the city of Serpukhov , near Moscow. currently lacks a defined GSSP. The Visean-Serpukhovian boundary coincides with a major period of glaciation. The resulting sea level fall and climatic changes led to the loss of connections between marine basins and endemism of marine fauna across the Russian margin. This means changes in biota are environmental rather than evolutionary making wider correlation difficult. Work
22200-420: Was still 10 to 25 per cent lower than it had been in 1066. It was also during the Norman period that Sussex achieved its greatest importance in comparison with other English counties. Sussex was on the main route between England and Normandy , and the lands of the Anglo-Norman nobility in what is now western France. The growth in Sussex's population, the importance of its ports and the increased colonisation of
22350-434: Was the heartland of King Harold and was potentially vulnerable to further invasion. In the immediate aftermath of the Normans' landing at Pevensey and the Battle of Hastings and to put an end to any rebellion, the Norman army destroyed estates and other assets on their route through Sussex, leading to a 40 per cent reduction in Sussex's wealth, a situation worse than any other southern or midland county. By 1086 wealth in Sussex
22500-407: Was triggered by tectonic factors with increased weathering of the growing Central Pangean Mountains and the influence of the mountains on precipitation and surface water flow. Closure of the oceanic gateway between the Rheic and Tethys oceans in the early Bashkirian also contributed to climate cooling by changing ocean circulation and heat flow patterns. Warmer periods with reduced ice volume within
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