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71-858: (Redirected from Brown Jura ) [REDACTED] Lithostratigraphy of the South German Jurassic . Abbreviations: Humph.-Fm = Humphriesioolith Formation L.Bk-Fm = Liegende Bankkalk Formation H.Bk-Fm = Hangende Bankkalk Formation Zm-Fm = Zementmergel Formation S.-Fm = Solnhofen Formation Rö.-Fm = Rögling Formation U.-Fm = Usseltal Formation Mö.-Fm = Mörnsheim Formation N.-Fm = Neuburg Formation R.-Fm = Rennertshofen Formation Set of geological formations in Central Europe The Brown Jurassic or Brown Jura ( German : Brauner Jura or Braunjura ) in earth history refers to

142-536: A few crater hotspots on the Moon have been analyzed). The Earth of the early Archean ( 4,031 to 2,500 million years ago ) may have had a different tectonic style. It is widely believed that the early Earth was dominated by vertical tectonic processes, such as stagnant lid , heat-pipe , or sagduction , which eventually transitioned to plate tectonics during the planet's mid-stage evolution. However, an alternative view proposes that Earth never experienced

213-682: A land bridge, while Greenland and North America were beginning to separate. The Laramide orogeny of the late Cretaceous continued to uplift the Rocky Mountains in the American west, which ended in the succeeding epoch. South and North America remained separated by equatorial seas (they joined during the Neogene ); the components of the former southern supercontinent Gondwana continued to split apart, with Africa , South America, Antarctica and Australia pulling away from each other. Africa

284-662: A major marine extinction, one that hit crinoids and ammonites especially hard. This sea-level drop and the associated unconformity in North America separate the Mississippian Period from the Pennsylvanian period . The Carboniferous was a time of active mountain building, as the supercontinent Pangea came together. The southern continents remained tied together in the supercontinent Gondwana, which collided with North America-Europe ( Laurussia ) along

355-603: A planetoid with the Earth. Outgassing and volcanic activity produced the primordial atmosphere. Condensing water vapor , augmented by ice delivered from asteroids , produced the oceans . However, in 2020, researchers reported that sufficient water to fill the oceans may have always been on the Earth since the beginning of the planet's formation. As the surface continually reshaped itself over hundreds of millions of years, continents formed and broke apart. They migrated across

426-432: A portion was ejected into space. Some of the material survived to form the orbiting Moon. Outgassing and volcanic activity produced the primordial atmosphere. Condensing water vapor , augmented by ice delivered from comets , produced the oceans . However, in 2020, researchers reported that sufficient water to fill the oceans may have always been on the Earth since the beginning of the planet's formation . During

497-465: A vertical tectonic phase and that plate tectonics have been active throughout its entire history. During this time, the Earth's crust cooled enough that rocks and continental plates began to form. Some scientists think because the Earth was hotter in the past, plate tectonic activity was more vigorous than it is today, resulting in a much greater rate of recycling of crustal material. This may have prevented cratonization and continent formation until

568-473: Is a major division of the geologic timescale that begins about 538.8 ± 0.2 Ma. Cambrian continents are thought to have resulted from the breakup of a Neoproterozoic supercontinent called Pannotia. The waters of the Cambrian period appear to have been widespread and shallow. Continental drift rates may have been anomalously high. Laurentia , Baltica and Siberia remained independent continents following

639-643: Is a unit of geologic time starting 23.03 Ma. and ends at 2.588 Ma. The Neogene Period follows the Paleogene Period. The Neogene consists of the Miocene and Pliocene and is followed by the Quaternary Period. The Miocene extends from about 23.03 to 5.333 Ma. During the Miocene continents continued to drift toward their present positions. Of the modern geologic features, only the land bridge between South America and North America

710-564: Is different from Wikidata Articles containing German-language text South German Jurassic The term South German Jurassic ( German : Süddeutscher Jura ) in earth history is used to refer to a lithostratigraphic rock unit at the hierarchical level of a supergroup . The rocks of the South German Jurassic were mainly deposited during the Jurassic period (199 to 146 million years ago). The boundaries of

781-648: Is divided into three eras – the Paleozoic , the Mesozoic and the Cenozoic . Most of the evolution of multicellular life occurred during this time period. The Paleozoic era spanned roughly 539 to 251 million years ago (Ma) and is subdivided into six geologic periods : from oldest to youngest, they are the Cambrian , Ordovician , Silurian , Devonian , Carboniferous and Permian . Geologically,

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852-770: The Alps isolated its final remnant, the Mediterranean , and created another shallow sea with island archipelagos to the north. Though the North Atlantic was opening, a land connection appears to have remained between North America and Europe since the faunas of the two regions are very similar. India continued its journey away from Africa and began its collision with Asia , creating the Himalayan orogeny. The Oligocene Epoch extends from about 34  million years ago to 23  million years ago . During

923-721: The Indian subcontinent , which collided with the Asian plate. This impact gave rise to the Himalayas. The Tethys Sea, which had separated the northern continents from Africa and India, began to close up, forming the Mediterranean Sea . The Paleogene (alternatively Palaeogene ) Period is a unit of geologic time that began 66 and ended 23.03 Ma and comprises the first part of the Cenozoic Era. This period consists of

994-592: The Isthmus of Panama during the Pliocene, bringing a nearly complete end to South America's distinctive marsupial faunas. The formation of the Isthmus had major consequences on global temperatures, since warm equatorial ocean currents were cut off and an Atlantic cooling cycle began, with cold Arctic and Antarctic waters dropping temperatures in the now-isolated Atlantic Ocean. Africa 's collision with Europe formed

1065-529: The Mississippian . There was also a drop in south polar temperatures; southern Gondwana was glaciated throughout the period, though it is uncertain if the ice sheets were a holdover from the Devonian or not. These conditions apparently had little effect in the deep tropics, where lush coal swamps flourished within 30 degrees of the northernmost glaciers. A mid-Carboniferous drop in sea-level precipitated

1136-654: The Oligocene the continents continued to drift toward their present positions. Antarctica continued to become more isolated and finally developed a permanent ice cap . Mountain building in western North America continued, and the Alps started to rise in Europe as the African Plate continued to push north into the Eurasian Plate , isolating the remnants of Tethys Sea . A brief marine incursion marks

1207-631: The Paleocene , Eocene and Oligocene Epochs. The Paleocene , lasted from 66  million years ago to 56  million years ago . In many ways, the Paleocene continued processes that had begun during the late Cretaceous Period. During the Paleocene, the continents continued to drift toward their present positions. Supercontinent Laurasia had not yet separated into three continents. Europe and Greenland were still connected. North America and Asia were still intermittently joined by

1278-401: The Paleozoic starts shortly after the breakup of a supercontinent called Pannotia and at the end of a global ice age. Throughout the early Paleozoic, Earth's landmass was broken up into a substantial number of relatively small continents. Toward the end of the era, the continents gathered together into a supercontinent called Pangaea , which included most of Earth's land area. The Cambrian

1349-605: The Permian all the Earth's major land masses, except portions of East Asia, were collected into a single supercontinent known as Pangaea . Pangaea straddled the equator and extended toward the poles, with a corresponding effect on ocean currents in the single great ocean ( Panthalassa , the universal sea ), and the Paleo-Tethys Ocean , a large ocean that was between Asia and Gondwana. The Cimmeria continent rifted away from Gondwana and drifted north to Laurasia, causing

1420-564: The Silurian , Gondwana continued a slow southward drift to high southern latitudes, but there is evidence that the Silurian ice caps were less extensive than those of the late Ordovician glaciation. The melting of ice caps and glaciers contributed to a rise in sea levels , recognizable from the fact that Silurian sediments overlie eroded Ordovician sediments, forming an unconformity . Other cratons and continent fragments drifted together near

1491-698: The atmosphere of Mars . However, the field strength was lower than at present and the magnetosphere was about half the modern radius. The geologic record of the Proterozoic ( 2,500 to 538.8 million years ago ) is more complete than that for the preceding Archean . In contrast to the deep-water deposits of the Archean, the Proterozoic features many strata that were laid down in extensive shallow epicontinental seas ; furthermore, many of these rocks are less metamorphosed than Archean-age ones, and plenty are unaltered. Study of these rocks shows that

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1562-406: The basement . The main divisions of the South German Jurassic are the: Geological history of Earth Initially, Earth was molten due to extreme volcanism and frequent collisions with other bodies. Eventually, the outer layer of the planet cooled to form a solid crust when water began accumulating in the atmosphere. The Moon formed soon afterwards, possibly as a result of the impact of

1633-421: The mantle cooled and convection slowed down. Others argue that the subcontinental lithospheric mantle is too buoyant to subduct and that the lack of Archean rocks is a function of erosion and subsequent tectonic events. Some geologists view the sudden increase in aluminum content in zircons as an indicator of the beginning of plate tectonics . Unlike Proterozoic rocks, Archean rocks are distinguished by

1704-625: The Brown Jura does not exactly coincide with the chronostratigraphic boundaries of the Middle Jurassic. In addition, the term Dogger , which was formerly frequently used (and sometimes is today) as a synonym should no longer be used in connexion with the South German Jurassic. Instead the term "Dogger" should be reserved for the roughly equivalent lithostratigraphic unit in the North German Jurassic. The Brown Jurassic

1775-664: The Carboniferous: the Panthalassa and Paleo-Tethys. Other minor oceans were shrinking and eventually closed the Rheic Ocean (closed by the assembly of South and North America), the small, shallow Ural Ocean (which was closed by the collision of Baltica , and Siberia continents, creating the Ural Mountains) and Proto-Tethys Ocean. The Permian extends from about 298.9 ± 0.15 to 252.17 ± 0.06 Ma. During

1846-571: The Hadean the Late Heavy Bombardment occurred (approximately 4,100 to 3,800 million years ago ) during which a large number of impact craters are believed to have formed on the Moon, and by inference on Earth, Mercury , Venus and Mars as well. However, some scientists argue against this hypothetical Late Heavy Bombardment, pointing out that the conclusion has been drawn from data which are not fully representative (only

1917-698: The North American Jurassic record is the poorest of the Mesozoic, with few outcrops at the surface. Though the epicontinental Sundance Sea left marine deposits in parts of the northern plains of the United States and Canada during the late Jurassic, most exposed sediments from this period are continental, such as the alluvial deposits of the Morrison Formation . The first of several massive batholiths were emplaced in

1988-643: The Paleo-Tethys to shrink. A new ocean was growing on its southern end, the Tethys Ocean, an ocean that would dominate much of the Mesozoic Era. Large continental landmasses create climates with extreme variations of heat and cold ("continental climate") and monsoon conditions with highly seasonal rainfall patterns. Deserts seem to have been widespread on Pangaea. The Mesozoic extended roughly from 252 to 66 million years ago . After

2059-634: The South Atlantic and Indian Oceans were newly formed. Such active rifting lifted great undersea mountain chains along the welts, raising eustatic sea levels worldwide. To the north of Africa the Tethys Sea continued to narrow. Broad shallow seas advanced across central North America (the Western Interior Seaway ) and Europe, then receded late in the period, leaving thick marine deposits sandwiched between coal beds. At

2130-471: The South German Jurassic and those of the chronostratigraphic or international Jurassic are not, however, exactly coincident. The depositions began rather later than the date of the international Triassic/Jurassic boundary and end as a result of erosion of the uppermost strata at various times during the Upper Jurassic , i.e. well before the international Jurassic/Cretaceous boundary. The rock unit of

2201-600: The South German Jurassic is underlain by Keuper ; in between is a small stratigraphic hiatus. Above the South German Jurassic the beds follow discordantly and with a large stratigraphic gap; in addition, Regensburg Green Sandstone occurs very locally, which is dated to the Cenomanian stage of the Cretaceous period. In its southern fringes the South German Jurassic dives under the Palaeogene molasse depositions of

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2272-473: The Sun, called an accretion disc from which Earth formed 4,500  million years ago . The Hadean Eon is not formally recognized, but it essentially marks the era before we have adequate record of significant solid rocks. The oldest dated zircons date from about 4,400  million years ago . Earth was initially molten due to extreme volcanism and frequent collisions with other bodies. Eventually,

2343-488: The Triassic was first studied. In North America , for example, marine deposits are limited to a few exposures in the west. Thus Triassic stratigraphy is mostly based on organisms living in lagoons and hypersaline environments, such as Estheria crustaceans and terrestrial vertebrates. The Jurassic Period extends from about 201.3 ± 0.2 to 145.0 Ma. During the early Jurassic , the supercontinent Pangaea broke up into

2414-684: The Triassic—;especially late in the period—but had not yet separated. The first nonmarine sediments in the rift that marks the initial break-up of Pangea—which separated New Jersey from Morocco —are of Late Triassic age; in the U.S., these thick sediments comprise the Newark Supergroup . Because of the limited shoreline of one super-continental mass, Triassic marine deposits are globally relatively rare; despite their prominence in Western Europe , where

2485-524: The Triassic, there was apparently no land near either pole, and no extensive ice caps existed. The Jurassic geological record is good in western Europe , where extensive marine sequences indicate a time when much of the continent was submerged under shallow tropical seas; famous locales include the Jurassic Coast World Heritage Site and the renowned late Jurassic lagerstätten of Holzmaden and Solnhofen . In contrast,

2556-535: The U.S. East Coast) today. The Triassic Period extends from about 252.17 ± 0.06 to 201.3 ± 0.2 Ma. During the Triassic , almost all the Earth's land mass was concentrated into a single supercontinent centered more or less on the equator, called Pangaea ("all the land"). This took the form of a giant " Pac-Man " with an east-facing "mouth" constituting the Tethys sea , a vast gulf that opened farther westward in

2627-626: The area that is now India, massive lava beds called the Deccan Traps were laid down in the very late Cretaceous and early Paleocene. The Cenozoic Era covers the 66 million years since the Cretaceous–Paleogene extinction event up to and including the present day. By the end of the Mesozoic era, the continents had rifted into nearly their present form. Laurasia became North America and Eurasia , while Gondwana split into South America , Africa , Australia , Antarctica and

2698-635: The beginning of the eon, while there were at least four during the Neoproterozoic, climaxing with the Snowball Earth of the Varangian glaciation. The Phanerozoic Eon is the current eon in the geologic timescale. It covers roughly 539 million years. During this period continents drifted apart, but eventually collected into a single landmass known as Pangea , before splitting again into the current continental landmasses. The Phanerozoic

2769-492: The bioavailability of the element for calcareous nanoplankton . These widespread carbonates and other sedimentary deposits make the Cretaceous rock record especially fine. Famous formations from North America include the rich marine fossils of Kansas 's Smoky Hill Chalk Member and the terrestrial fauna of the late Cretaceous Hell Creek Formation . Other important Cretaceous exposures occur in Europe and China . In

2840-656: The break-up of the supercontinent of Pannotia. Gondwana started to drift toward the South Pole. Panthalassa covered most of the southern hemisphere, and minor oceans included the Proto-Tethys Ocean , Iapetus Ocean and Khanty Ocean . The Ordovician period started at a major extinction event called the Cambrian–Ordovician extinction event some time about 485.4 ± 1.9 Ma. During the Ordovician

2911-464: The cooling. The present pattern of ice ages began about 40  million years ago . The northern supercontinent of Laurasia began to break up, as Europe , Greenland and North America drifted apart. In western North America, mountain building started in the Eocene, and huge lakes formed in the high flat basins among uplifts. In Europe, the Tethys Sea finally vanished, while the uplift of

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2982-614: The early Oligocene in Europe. There appears to have been a land bridge in the early Oligocene between North America and Europe since the faunas of the two regions are very similar. During the Oligocene, South America was finally detached from Antarctica and drifted north toward North America . It also allowed the Antarctic Circumpolar Current to flow, rapidly cooling the continent. The Neogene Period

3053-529: The end of the Pliocene . The polar regions have since undergone repeated cycles of glaciation and thawing, repeating every 40,000–100,000 years. The Last Glacial Period of the current ice age ended about 10,000 years ago. The Precambrian includes approximately 90% of geologic time. It extends from 4.6 billion years ago to the beginning of the Cambrian Period (about 539 Ma ). It includes

3124-480: The eon featured massive, rapid continental accretion (unique to the Proterozoic), supercontinent cycles , and wholly modern orogenic activity. Roughly 750  million years ago , the earliest-known supercontinent Rodinia , began to break apart. The continents later recombined to form Pannotia , 600–540 Ma. The first-known glaciations occurred during the Proterozoic, one that began shortly after

3195-516: The equator, starting the formation of a second supercontinent known as Euramerica . The vast ocean of Panthalassa covered most of the northern hemisphere. Other minor oceans include Proto-Tethys, Paleo-Tethys, Rheic Ocean, a seaway of Iapetus Ocean (now in between Avalonia and Laurentia), and newly formed Ural Ocean . The Devonian spanned roughly from 419 to 359 Ma. The period was a time of great tectonic activity, as Laurasia and Gondwana drew closer together. The continent Euramerica (or Laurussia)

3266-574: The first three of the four eons of Earth's prehistory (the Hadean , Archean and Proterozoic ) and precedes the Phanerozoic eon. Major volcanic events altering the Earth's environment and causing extinctions may have occurred 10 times in the past 3 billion years. During Hadean time (4.6–4 Ga ), the Solar System was forming, probably within a large cloud of gas and dust around

3337-539: The five major extinction events in Earth's history in terms of percentage of genera that became extinct. The only larger one was the Permian-Triassic extinction event. The extinctions occurred approximately 447 to 444 million years ago and mark the boundary between the Ordovician and the following Silurian Period. The most-commonly accepted theory is that these events were triggered by

3408-411: The heat around the world and keeping global temperatures high. But when Australia split from the southern continent around 45 Ma , the warm equatorial currents were deflected away from Antarctica, and an isolated cold water channel developed between the two continents. The Antarctic region cooled down, and the ocean surrounding Antarctica began to freeze, sending cold water and ice floes north, reinforcing

3479-410: The mid-Triassic, at the expense of the shrinking Paleo-Tethys Ocean , an ocean that existed during the Paleozoic . The remainder was the world-ocean known as Panthalassa ("all the sea"). All the deep-ocean sediments laid down during the Triassic have disappeared through subduction of oceanic plates; thus, very little is known of the Triassic open ocean. The supercontinent Pangaea was rifting during

3550-412: The middle of the three lithostratigraphic units of the South German Jurassic , the latter being understood not as a geographical, but a geological term in the sense of a lithostratigraphic super group . Formerly and even occasionally today in the popular scientific literature, this term is equated to the chronostratigraphic series of the Middle Jurassic . This is however not quite correct, because

3621-408: The neighboring island rocks and deposited in a forearc basin . In short, greenstone belts represent sutured protocontinents. The Earth's magnetic field was established 3.5 billion years ago. The solar wind flux was about 100 times the value of the modern Sun , so the presence of the magnetic field helped prevent the planet's atmosphere from being stripped away, which is what probably happened to

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3692-411: The northern Appalachian Mountains and forming the Caledonian Mountains in Great Britain and Scandinavia . The southern continents remained tied together in the supercontinent of Gondwana . The remainder of modern Eurasia lay in the Northern Hemisphere. Sea levels were high worldwide, and much of the land lay submerged under shallow seas. The deep, enormous Panthalassa (the "universal ocean") covered

3763-524: The northern Cordillera beginning in the mid-Jurassic, marking the Nevadan orogeny . Important Jurassic exposures are also found in Russia, India, South America, Japan, Australasia and the United Kingdom. The Cretaceous Period extends from circa 145  million years ago to 66  million years ago . During the Cretaceous , the late Paleozoic -early Mesozoic supercontinent of Pangaea completed its breakup into present day continents , although their positions were substantially different at

3834-489: The northern supercontinent Laurasia and the southern supercontinent Gondwana ; the Gulf of Mexico opened in the new rift between North America and what is now Mexico 's Yucatan Peninsula . The Jurassic North Atlantic Ocean was relatively narrow, while the South Atlantic did not open until the following Cretaceous Period, when Gondwana itself rifted apart. The Tethys Sea closed, and the Neotethys basin appeared. Climates were warm, with no evidence of glaciation . As in

3905-433: The onset of an ice age , in the Hirnantian faunal stage that ended the long, stable greenhouse conditions typical of the Ordovician. The ice age was probably not as long-lasting as once thought; study of oxygen isotopes in fossil brachiopods shows that it was probably no longer than 0.5 to 1.5 million years. The event was preceded by a fall in atmospheric carbon dioxide (from 7000ppm to 4400ppm) which selectively affected

3976-504: The outer layer of the planet cooled to form a solid crust when water began accumulating in the atmosphere. The Moon formed soon afterwards, possibly as a result of the impact of a large planetoid with the Earth. More recent potassium isotopic studies suggest that the Moon was formed by a smaller, high-energy, high-angular-momentum giant impact cleaving off a significant portion of the Earth. Some of this object's mass merged with Earth, significantly altering its internal composition, and

4047-423: The peak of the Cretaceous transgression , one-third of Earth's present land area was submerged. The Cretaceous is justly famous for its chalk ; indeed, more chalk formed in the Cretaceous than in any other period in the Phanerozoic . Mid-ocean ridge activity—or rather, the circulation of seawater through the enlarged ridges—enriched the oceans in calcium; this made the oceans more saturated, as well as increased

4118-413: The period, causing the Iapetus Ocean to shrink between them. Also, Avalonia broke free from Gondwana and began to head north toward Laurentia. The Rheic Ocean was formed as a result of this. By the end of the period, Gondwana had neared or approached the pole and was largely glaciated. The Ordovician came to a close in a series of extinction events that, taken together, comprise the second-largest of

4189-401: The presence of heavily metamorphosed deep-water sediments, such as graywackes , mudstones , volcanic sediments and banded iron formations . Greenstone belts are typical Archean formations, consisting of alternating high- and low-grade metamorphic rocks. The high-grade rocks were derived from volcanic island arcs , while the low-grade metamorphic rocks represent deep-sea sediments eroded from

4260-419: The present line of eastern North America . This continental collision resulted in the Hercynian orogeny in Europe, and the Alleghenian orogeny in North America; it also extended the newly uplifted Appalachians southwestward as the Ouachita Mountains . In the same time frame, much of present eastern Eurasian Plate welded itself to Europe along the line of the Ural Mountains . There were two major oceans in

4331-419: The rest of the planet. Other minor oceans were Paleo-Tethys, Proto-Tethys, Rheic Ocean and Ural Ocean (which was closed during the collision with Siberia and Baltica). The Carboniferous extends from about 358.9 ± 0.4 to about 298.9 ± 0.15 Ma. A global drop in sea level at the end of the Devonian reversed early in the Carboniferous ; this created the widespread epicontinental seas and carbonate deposition of

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4402-432: The shallow seas where most organisms lived. As the southern supercontinent Gondwana drifted over the South Pole, ice caps formed on it. Evidence of these ice caps has been detected in Upper Ordovician rock strata of North Africa and then-adjacent northeastern South America, which were south-polar locations at the time. The Silurian is a major division of the geologic timescale that started about 443.8 ± 1.5 Ma. During

4473-416: The southern continents were collected into a single continent called Gondwana. Gondwana started the period in the equatorial latitudes and, as the period progressed, drifted toward the South Pole. Early in the Ordovician the continents Laurentia, Siberia and Baltica were still independent continents (since the break-up of the supercontinent Pannotia earlier), but Baltica began to move toward Laurentia later in

4544-440: The surface , occasionally combining to form a supercontinent . Roughly 750  million years ago , the earliest-known supercontinent Rodinia , began to break apart. The continents later recombined to form Pannotia , 600 to 540 million years ago , then finally Pangaea , which broke apart 200  million years ago . The present pattern of ice ages began about 40  million years ago , then intensified at

4615-481: The time. As the Atlantic Ocean widened, the convergent-margin orogenies that had begun during the Jurassic continued in the North American Cordillera , as the Nevadan orogeny was followed by the Sevier and Laramide orogenies . Though Gondwana was still intact in the beginning of the Cretaceous, Gondwana itself broke up as South America , Antarctica and Australia rifted away from Africa (though India and Madagascar remained attached to each other); thus,

4686-427: The vigorous convergent plate mountain-building of the late Paleozoic , Mesozoic tectonic deformation was comparatively mild. Nevertheless, the era featured the dramatic rifting of the supercontinent Pangaea . Pangaea gradually split into a northern continent, Laurasia , and a southern continent, Gondwana . This created the passive continental margin that characterizes most of the Atlantic coastline (such as along

4757-604: The western Mediterranean region and a global fall in sea levels combined to cause a temporary drying up of the Mediterranean Sea resulting in the Messinian salinity crisis near the end of the Miocene. The Pliocene extends from 5.333  million years ago to 2.588  million years ago . During the Pliocene continents continued to drift toward their present positions, moving from positions possibly as far as 250 kilometres (155 mi) from their present locations to positions only 70 km from their current locations. South America became linked to North America through

4828-416: Was absent, the subduction zone along the Pacific Ocean margin of South America caused the rise of the Andes and the southward extension of the Meso-American peninsula. India continued to collide with Asia . The Tethys Seaway continued to shrink and then disappeared as Africa collided with Eurasia in the Turkish - Arabian region between 19 and 12 Ma ( ICS 2004). Subsequent uplift of mountains in

4899-417: Was created in the early Devonian by the collision of Laurentia and Baltica, which rotated into the natural dry zone along the Tropic of Capricorn . In these near-deserts, the Old Red Sandstone sedimentary beds formed, made red by the oxidized iron ( hematite ) characteristic of drought conditions. Near the equator Pangaea began to consolidate from the plates containing North America and Europe, further raising

4970-4173: Was deposited about 175-161 million years ago. The Brown Jurassic follows the lithostratigraphic unit of the Black Jurassic and is superimposed on the lithostratigraphic group of the White Jurassic . Literature [ edit ] Gert Bloos, Gerd Dietl & Günter Schweigert: Der Jura Süddeutschlands in der Stratigraphischen Tabelle von Deutschland 2002. Newsletters on Stratigraphy, 41(1-3): 263-277, Stuttgart, 2005, ISSN   0078-0421 Eckhard Mönnig: Der Jura von Norddeutschland in der Stratigraphischen Tabelle von Deutschland 2002. Newsletters on Stratigraphy, 41(1-3): 253-261, Stuttgart, 2005. Friedrich August Quenstedt: Das Flözgebirge Würtembergs. Mit besonderer Rücksicht auf den Jura . Verlag der Laupp'schen Buchhandlung, Tübingen, 1843. Friedrich August Quenstedt: Der Jura. Verlag der Laupp’schen Buchhandlung, Tübingen, 1856-57. External links [ edit ] Deutsche Stratigraphische Kommission (ed.): Stratigraphische Tabelle von Deutschland 2002 , Potsdam, 2002. ISBN   3-00-010197-7 pdf Geologische Übersicht der Schichtenfolge in Baden-Württemberg (pdf; 183 kB) The Middle Jurassic in Baden-Württemberg (pdf; 20.5 kB) v t e Geological history of Earth Cenozoic Era (present–66.0 Ma) Quaternary (present–2.58 Ma) Holocene (present–11.7 ka) Pleistocene (11.7 ka–2.58 Ma) Neogene (2.58–23.0 Ma) Pliocene (2.59–5.33 Ma) Miocene (5.33–23.0 Ma) Paleogene (23.0–66.0 Ma) Oligocene (23.0–33.9 Ma) Eocene (33.9–56.0 Ma) Paleocene (56.0–66.0 Ma) Mesozoic Era (66.0–252 Ma) Cretaceous (66.0–145 Ma) Late (66.0–100 Ma) Early (100–145 Ma) Jurassic (145–201 Ma) Late (145–164 Ma) Middle (164–174 Ma) Early (174–201 Ma) Triassic (201–252 Ma) Late (201–237 Ma) Middle (237–247 Ma) Early (247–252 Ma) Paleozoic Era (252–539 Ma) Permian (252–299 Ma) Lopingian (252–260 Ma) Guadalupian (260–272 Ma) Cisuralian (272–299 Ma) Carboniferous (299–359 Ma) Pennsylvanian (299–323 Ma) Mississippian (323–359 Ma) Devonian (359–419 Ma) Late (359–383 Ma) Middle (383–393 Ma) Early (393–419 Ma) Silurian (419–444 Ma) Pridoli (419–423 Ma) Ludlow (423–427 Ma) Wenlock (427–433 Ma) Llandovery (433–444 Ma) Ordovician (444–485 Ma) Late (444–458 Ma) Middle (458–470 Ma) Early (470–485 Ma) Cambrian (485–539 Ma) Furongian (485–497 Ma) Miaolingian (497–509 Ma) Series 2 (509–521 Ma) Terreneuvian (521–539 Ma) Proterozoic Eon (539 Ma–2.5 Ga) Neoproterozoic (539 Ma–1 Ga) Ediacaran (539–635 Ma) Cryogenian (635–720 Ma) Tonian (720 Ma–1 Ga) Mesoproterozoic (1–1.6 Ga) Stenian (1–1.2 Ga) Ectasian (1.2–1.4 Ga) Calymmian (1.4–1.6 Ga) Paleoproterozoic (1.6–2.5 Ga) Statherian (1.6–1.8 Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum (thousand years ago); Ma = megaannum (million years ago); Ga = gigaannum (billion years ago). See also: Geologic time scale  • [REDACTED] Geology portal  • [REDACTED] World portal Authority control databases : National [REDACTED] Germany Retrieved from " https://en.wikipedia.org/w/index.php?title=Brown_Jurassic&oldid=1254458096 " Categories : South German Jurassic Jurassic System of Europe Hidden categories: Articles with short description Short description

5041-502: Was heading north toward Europe , slowly closing the Tethys Ocean , and India began its migration to Asia that would lead to a tectonic collision and the formation of the Himalayas . During the Eocene ( 56  million years ago - 33.9  million years ago ), the continents continued to drift toward their present positions. At the beginning of the period, Australia and Antarctica remained connected, and warm equatorial currents mixed with colder Antarctic waters, distributing

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