Kharagdiha is a village in the Jamua CD block in the Khori Mahua subdivision of the Giridih district in the Indian state of Jharkhand . It had been known as Curruckdea or Curruckdeah during the British Raj .
114-466: Kharagdiha is located at 24°25′24″N 86°09′57″E / 24.42333°N 86.16583°E / 24.42333; 86.16583 . Giridih district is a part of the Chota Nagpur plateau , with rocky soil and extensive forests. Most of the rivers in the district flow from the west to east, except in the northern portion where the rivers flow north and north west. The Pareshnath Hill rises to
228-496: A tropical and subtropical dry broadleaf forests ecoregion , encompasses the plateau. The ecoregion has an area of 122,100 square kilometres (47,100 sq mi), covering most of the state of Jharkhand and adjacent portions of Odisha, West Bengal, Bihar, Chhattisgarh, Uttar Pradesh, and Madhya Pradesh. The ecoregion is drier than surrounding ones, including the Eastern Highlands moist deciduous forests that covers
342-555: A Berriasian–Barremian warm-dry phase, an Aptian–Santonian warm-wet phase, and a Campanian–Maastrichtian cool-dry phase. As in the Cenozoic, the 400,000 year eccentricity cycle was the dominant orbital cycle governing carbon flux between different reservoirs and influencing global climate. The location of the Intertropical Convergence Zone (ITCZ) was roughly the same as in the present. The cooling trend of
456-479: A general elevation of about 300 metres (1,000 ft) and it consists of undulating land with scattered hills – Baghmundi and Ajodhya range, Panchakot and the hills around Jhalda are the prominent ones. Adjacent Bankura district of West Bengal has been described as the "connecting link between the plains of Bengal on the east and Chota Nagpur plateau on the west." The same could be said of the Birbhum district and
570-827: A height of 150 metres (490 ft) from these hills, making it the highest waterfall on the Chota Nagpur Plateau. Netarhat and Pakripat plateaus are physiographically part of the Pat region. In the lowest step of the Chota Nagpur Plateau, the Manbhum area covers the present Purulia district in West Bengal , and Dhanbad district and parts of Bokaro district in Jharkhand, and the Singhbhum area broadly covers Kolhan division of Jharkhand. The Manbhum area has
684-413: A height of 4,479 feet (1,365 m). The district has coal and mica mines. It is an overwhelmingly rural district with small pockets of urbanisation. Note: The map alongside presents some of the notable locations in the district. All places marked in the map are linked in the larger full screen map. Kharagdiha estate was founded in 15th century when the then Maharaja was able to influence and impress
798-575: A range of biota, such as angiosperm leaves, fruits, flowers, wood, and fish. This stratigraphy has been associated with the Neogene, specifically the Pliocene epoch, despite a lack of conclusive evidence. Earlier studies identified vertebrate fossils in these sediments, with reported fish fossils with affinities to modern families, linking these deposits to recent ichthyofauna adaptations. The Chota Nagpur Plateau consists of three steps. The highest step
912-414: A relatively warm climate , resulting in high eustatic sea levels that created numerous shallow inland seas . These oceans and seas were populated with now- extinct marine reptiles , ammonites , and rudists , while dinosaurs continued to dominate on land. The world was largely ice-free, although there is some evidence of brief periods of glaciation during the cooler first half, and forests extended to
1026-674: A straight shell, flourished in the seas along with reef-building rudist clams. Inoceramids were also particularly notable among Cretaceous bivalves, and they have been used to identify major biotic turnovers such as at the Turonian-Coniacian boundary. Predatory gastropods with drilling habits were widespread. Globotruncanid foraminifera and echinoderms such as sea urchins and starfish (sea stars) thrived. Ostracods were abundant in Cretaceous marine settings; ostracod species characterised by high male sexual investment had
1140-531: A total of 38 Gadis in the kingdom. During the British Raj Kharagdiha became a part of Jungle Terry . The Gadis of Kharagdiha were permanently settled and they became Zamindari estates. The rulers of Kharagdiha were separately settled the zamindari estate of Raj Dhanwar in 1809. Subsequent to the Kol uprising in 1831 that, did not seriously affect Hazaribag, however, the administrative structure of
1254-476: A traditional alcoholic beverage and as a food source for animals. Other significant plants include bamboo ( Bambusa ), teak ( Tectona grandis ),and wild mango ( Mangifera indica ), flame of the forest ( Butea monosperma ). The region is home to diverse wildlife, including apex predators like the tiger ( Panthera tigris ) and large herbivores such as the Asian elephant ( Elephas maximus ). Ungulates such as
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#17327724766201368-447: A variety of raptors and migratory birds. The Chota Nagpur Plateau was once extensively forested, but today over half of its natural forest cover has been removed, largely for grazing land and increasingly intense mining activities. These disruptions pose significant ecological threats. Mining for minerals like coal, iron ore, and bauxite has led to large-scale deforestation, soil erosion, and habitat fragmentation, which critically affects
1482-564: A ~0.6 °C increase in temperature. The latter warming interval, occurring at the very end of the Cretaceous, was triggered by the activity of the Deccan Traps. The LKEPCI lasted into the Late Palaeocene , when it gave way to another supergreenhouse interval. The production of large quantities of magma, variously attributed to mantle plumes or to extensional tectonics , further pushed sea levels up, so that large areas of
1596-447: Is 610 metres (2,000 ft). The topography in undulating with prominent gneissic hills, often dome-like in outline. The lowest step of the plateau is at an average level of around 300 metres (1,000 ft). It covers the old Manbhum and Singhbhum districts. High hills are a striking part of this section – Parasnath Hills rise to a height of 1,370 metres (4,480 ft) and Dalma Hills to 1,038 metres (3,407 ft). The large plateau
1710-400: Is also referred to as Western Ranchi Plateau. It is believed to be composed of Deccan basalt lava. The Ranchi Plateau is the largest part of the Chota Nagpur Plateau. The elevation of the plateau surface in this part is about 700 m (2,300 ft) and gradually slopes down towards south-east into the hilly and undulating region of Singhbhum (earlier the Singhbhum district or what is now
1824-619: Is found in England, northern France, the low countries , northern Germany , Denmark and in the subsurface of the southern part of the North Sea . Chalk is not easily consolidated and the Chalk Group still consists of loose sediments in many places. The group also has other limestones and arenites . Among the fossils it contains are sea urchins , belemnites , ammonites and sea reptiles such as Mosasaurus . In southern Europe,
1938-403: Is in the western part of the plateau, where pats as a plateau is locally called, are 910 to 1,070 metres (3,000 to 3,500 ft) above sea level. The highest point is 1,164 metres (3,819 ft). The next part contains larger portions of the old Ranchi and Hazaribagh districts and some parts of old Palamu district, before these were broken up into smaller administrative units. The general height
2052-407: Is mostly hilly, though near the borders of West Bengal it flattens out into an alluvial plain. In the Singhbhum area, there are hills alternating with valleys, steep mountains, deep forests on the mountain slopes, and, in the river basins, some stretches of comparatively level or undulating country. The centre of the area consists of an upland plateau enclosed by hill ranges. This strip, extending from
2166-509: Is now used worldwide. In many parts of the world, alternative local subdivisions are still in use. From youngest to oldest, the subdivisions of the Cretaceous period are: The lower boundary of the Cretaceous is currently undefined, and the Jurassic–Cretaceous boundary is currently the only system boundary to lack a defined Global Boundary Stratotype Section and Point (GSSP). Placing a GSSP for this boundary has been difficult because of
2280-531: Is subdivided into several small plateaus or sub-plateaus. The western plateau with an average elevation of 1,000 metres (3,300 ft) above mean sea level merges into the plateau of the Surguja district of Chhattisgarh. The flat topped plateau, locally known as pats are characterized by level surface and accordance of their summit levels shows they are part of one large plateau. Examples include Netarhat Pat, Jamira Pat, Khamar Pat, Rudni Pat and others. The area
2394-518: Is the third and final period of the Mesozoic Era , as well as the longest. At around 79 million years, it is the ninth and longest geological period of the entire Phanerozoic . The name is derived from the Latin creta , ' chalk ', which is abundant in the latter half of the period. It is usually abbreviated K , for its German translation Kreide . The Cretaceous was a period with
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#17327724766202508-453: The Asansol and Durgapur subdivisions of Bardhaman district . The Singhbhum area contains much more hilly and broken country. The whole of the western part is a mass of hill ranges rising to 910 metres (3,000 ft) in the south-west. Jamshedpur sits on an open plateau, 120 to 240 metres (400 to 800 ft) above mean sea level, with a higher plateau to the south of it. The eastern part
2622-725: The Eastern Ghats and Satpura Range to the south, and the Lower Gangetic Plains moist deciduous forests in the lowlands to the east and north. The plateau is covered with a variety of various habitats of which Sal forest is predominant. The plateau is home to the Palamau Tiger Reserve and other large blocks of natural habitat which are among the few remaining refuges left in India for large populations of tiger and Asian elephants . The flora of
2736-635: The Kolhan division ). The plateau is highly dissected. The Damodar River originates here and flows through a rift valley . To the north it is separated from the Hazaribagh plateau by the Damodar trough. To the west is a group of plateaus called pat . There are many waterfalls at the edges of the Ranchi plateau where rivers coming from over the plateau surface form waterfalls when they descend through
2850-713: The Mancos Shale of western North America. These shales are an important source rock for oil and gas , for example in the subsurface of the North Sea. In northwestern Europe, chalk deposits from the Upper Cretaceous are characteristic for the Chalk Group , which forms the white cliffs of Dover on the south coast of England and similar cliffs on the French Normandian coast. The group
2964-711: The North American Cordillera , as the Nevadan orogeny was followed by the Sevier and Laramide orogenies . Gondwana had begun to break up during the Jurassic Period, but its fragmentation accelerated during the Cretaceous and was largely complete by the end of the period. South America , Antarctica , and Australia rifted away from Africa (though India and Madagascar remained attached to each other until around 80 million years ago); thus,
3078-523: The Santhal , Munda , Oraon , and Ho , alongside non-tribal groups. These groups have distinct traditions, languages, and spiritual practices, often tied closely to nature and ancestral worship. Festivals like Sarhul, Holi and Karam are central to their culture, celebrating harvests and nature with traditional music, dance, and rituals. Craftsmanship is a strong aspect, with communities creating intricate beadwork, pottery, and metalwork. Human habitation in
3192-553: The Selli Event . Early Aptian tropical sea surface temperatures (SSTs) were 27–32 °C, based on TEX 86 measurements from the equatorial Pacific. During the Aptian, Milankovitch cycles governed the occurrence of anoxic events by modulating the intensity of the hydrological cycle and terrestrial runoff. The early Aptian was also notable for its millennial scale hyperarid events in the mid-latitudes of Asia. The BAWI itself
3306-630: The Terrain Crétacé , using strata in the Paris Basin and named for the extensive beds of chalk ( calcium carbonate deposited by the shells of marine invertebrates , principally coccoliths ), found in the upper Cretaceous of Western Europe . The name Cretaceous was derived from the Latin creta , meaning chalk . The twofold division of the Cretaceous was implemented by Conybeare and Phillips in 1822. Alcide d'Orbigny in 1840 divided
3420-728: The Turonian Age, based on isotopic evidence. However, this has subsequently been suggested to be the result of inconsistent isotopic proxies, with evidence of polar rainforests during this time interval at 82° S. Rafting by ice of stones into marine environments occurred during much of the Cretaceous, but evidence of deposition directly from glaciers is limited to the Early Cretaceous of the Eromanga Basin in southern Australia . Flowering plants (angiosperms) make up around 90% of living plant species today. Prior to
3534-459: The four-horned antelope ( Tetracerus quadricornis ), blackbuck ( Antilope cervicapra ), and chinkara ( Gazella bennettii ) are also common, alongside predators like the dhole ( Cuon alpinus ) and the sloth bear ( Melursus ursinus ). Bird species include the threatened lesser florican ( Sypheotides indicus ), various hornbills including the Indian grey hornbill ( Ocyceros birostris ), and
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3648-537: The ghatwals of Kharagdiha Gadis. The Hazaribagh Gazetteer describes this kingdom 600 miles long which spread from Hazaribagh to Gaya . The Kharagdiha gadis were semi-independent chiefdoms. All that the ruler of the Gadi had to do on succession was to acknowledge the supremacy of the Kharagdiha Maharaja. Koderma , Gadi Palganj , Mahal Ledo , Ghoranji Gadi and Gadi Sirsia were notable gadis. There were
3762-483: The tuatara ) disappeared from North America and Europe after the Early Cretaceous , and were absent from North Africa and northern South America by the early Late Cretaceous . The cause of the decline of Rhynchocephalia remains unclear, but has often been suggested to be due to competition with advanced lizards and mammals. They appear to have remained diverse in high-latitude southern South America during
3876-999: The Albian regularly expanded northward in tandem with expansions of subtropical high pressure belts. The Cedar Mountain Formation's Soap Wash flora indicates a mean annual temperature of between 19 and 26 °C in Utah at the Albian-Cenomanian boundary. Tropical SSTs during the Cenomanian-Turonian Thermal Maximum were at least 30 °C, though one study estimated them as high as between 33 and 42 °C. An intermediate estimate of ~33-34 °C has also been given. Meanwhile, deep ocean temperatures were as much as 15 to 20 °C (27 to 36 °F) warmer than today's; one study estimated that deep ocean temperatures were between 12 and 20 °C during
3990-571: The Cenozoic Era — the ichthyosaurs , last remaining temnospondyls ( Koolasuchus ), and nonmammalian cynodonts ( Tritylodontidae ) — were already extinct millions of years before the event occurred. Coccolithophorids and molluscs , including ammonites , rudists , freshwater snails , and mussels , as well as organisms whose food chain included these shell builders, became extinct or suffered heavy losses. For example, ammonites are thought to have been
4104-573: The Chota Nagpur Plateau is approximately 65,000 square kilometres (25,000 sq mi). The name Nagpur is probably taken from Nagavanshis , who ruled in this part of the country. Chhota ( small in Hindi) is the misunderstood name of "Chuita" village in the outskirts of Ranchi , which has the remains of an old fort belonging to the Nagavanshis. The Chota Nagpur Plateau is a continental plateau—an extensive area of land thrust above
4218-416: The Chota Nagpur Plateau ranges from dry to wet forests, with trees reaching heights of up to 25 metres (82 ft). Some areas are swampy, while others feature bamboo grasslands and shrubs like Holarrhena and Dodonaea . Key species include sal ( Shorea robusta ), which provides valuable timber and supports diverse wildlife, and mahua ( Madhuca longifolia ), known for its fragrant flowers used to make
4332-645: The Coniacian through the Maastrichtian. During the Cretaceous, the late- Paleozoic -to-early-Mesozoic supercontinent of Pangaea completed its tectonic breakup into the present-day continents , although their positions were substantially different at the time. As the Atlantic Ocean widened, the convergent-margin mountain building ( orogenies ) that had begun during the Jurassic continued in
4446-626: The Cretaceous is sharply defined, being placed at an iridium -rich layer found worldwide that is believed to be associated with the Chicxulub impact crater , with its boundaries circumscribing parts of the Yucatán Peninsula and extending into the Gulf of Mexico . This layer has been dated at 66.043 Mya. At the end of the Cretaceous, the impact of a large body with the Earth may have been
4560-570: The Cretaceous is usually a marine system consisting of competent limestone beds or incompetent marls . Because the Alpine mountain chains did not yet exist in the Cretaceous, these deposits formed on the southern edge of the European continental shelf , at the margin of the Tethys Ocean . During the Cretaceous, the present North American continent was isolated from the other continents. In
4674-537: The Cretaceous seas. Stagnation of deep sea currents in middle Cretaceous times caused anoxic conditions in the sea water leaving the deposited organic matter undecomposed. Half of the world's petroleum reserves were laid down at this time in the anoxic conditions of what would become the Persian Gulf and the Gulf of Mexico. In many places around the world, dark anoxic shales were formed during this interval, such as
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4788-531: The Damodar valley is steep as far as the southeastern corner of the Hazaribagh plateau. On the south of the trough the Damodar keeps close to the edge of the Ranchi plateau till it has passed Ramgarh, after which a turn to the north-east leaves on the right hand a wide and level valley on which the Subarnarekha begins to intrude, south of Gola till the Singhpur Hills divert it to the south. Further to
4902-794: The French Cretaceous into five étages (stages): the Neocomian , Aptian, Albian, Turonian, and Senonian, later adding the Urgonian between Neocomian and Aptian and the Cenomanian between the Albian and Turonian. The Cretaceous is divided into Early and Late Cretaceous epochs , or Lower and Upper Cretaceous series . In older literature, the Cretaceous is sometimes divided into three series: Neocomian (lower/early), Gallic (middle) and Senonian (upper/late). A subdivision into 12 stages , all originating from European stratigraphy,
5016-672: The Jurassic, the North Atlantic already opened, leaving a proto-ocean between Europe and North America. From north to south across the continent, the Western Interior Seaway started forming. This inland sea separated the elevated areas of Laramidia in the west and Appalachia in the east. Three dinosaur clades found in Laramidia (troodontids, therizinosaurids and oviraptorosaurs) are absent from Appalachia from
5130-666: The Koderma plateau, elevated above the plains of Bihar, has the appearance of a range of hills, but in reality it is the edge of a plateau, 240 metres (800 ft) from the level of the Gaya plain. Eastward this northern edge forms a well-defined watershed between heads of the tributaries of Gaya and those of the Barakar River , which traverses the Koderma and Giridih districts in an easterly direction. The slope of this plateau to
5244-576: The LKEPCI. During this period of relatively cool temperatures, the ITCZ became narrower, while the strength of both summer and winter monsoons in East Asia was directly correlated to atmospheric CO 2 concentrations. Laramidia likewise had a seasonal, monsoonal climate. The Maastrichtian was a time of chaotic, highly variable climate. Two upticks in global temperatures are known to have occurred during
5358-532: The Late Cretaceous, where lizards remained rare, with their remains outnumbering terrestrial lizards 200:1. Choristoderes , a group of freshwater aquatic reptiles that first appeared during the preceding Jurassic, underwent a major evolutionary radiation in Asia during the Early Cretaceous, which represents the high point of choristoderan diversity, including long necked forms such as Hyphalosaurus and
5472-555: The Late Cretaceous-Early Palaeogene Cool Interval (LKEPCI). Tropical SSTs declined from around 35 °C in the early Campanian to around 28 °C in the Maastrichtian. Deep ocean temperatures declined to 9 to 12 °C, though the shallow temperature gradient between tropical and polar seas remained. Regional conditions in the Western Interior Seaway changed little between the MKH and
5586-486: The MKH. Mean annual temperatures at the poles during the MKH exceeded 14 °C. Such hot temperatures during the MKH resulted in a very gentle temperature gradient from the equator to the poles; the latitudinal temperature gradient during the Cenomanian-Turonian Thermal Maximum was 0.54 °C per ° latitude for the Southern Hemisphere and 0.49 °C per ° latitude for the Northern Hemisphere, in contrast to present day values of 1.07 and 0.69 °C per ° latitude for
5700-412: The MKH. The poles were so warm that ectothermic reptiles were able to inhabit them. Beginning in the Santonian, near the end of the MKH, the global climate began to cool, with this cooling trend continuing across the Campanian. This period of cooling, driven by falling levels of atmospheric carbon dioxide, caused the end of the MKH and the transition into a cooler climatic interval, known formally as
5814-404: The Maastrichtian, bucking the trend of overall cooler temperatures during the LKEPCI. Between 70 and 69 Ma and 66–65 Ma, isotopic ratios indicate elevated atmospheric CO 2 pressures with levels of 1000–1400 ppmV and mean annual temperatures in west Texas between 21 and 23 °C (70 and 73 °F). Atmospheric CO 2 and temperature relations indicate a doubling of pCO 2 was accompanied by
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#17327724766205928-549: The Raru River (to the east of Ranchi city) and forms the said falls. The Hazaribagh plateau is often subdivided into two parts – the higher plateau and the lower plateau . Here the higher plateau is referred to as Hazaribagh plateau and the lower plateau as Koderma plateau. The Hazaribagh plateau on which Hazaribagh town is built is about 64 km (40 mi) east by west and 24 km (15 mi) north by south with an average elevation of 610 m (2,000 ft). The north-eastern and southern faces are mostly abrupt; but to
6042-472: The Sankh River (Ranchi plateau) are examples of scarp falls. Sometimes waterfalls of various dimensions are formed when tributary streams join the master stream from great heights forming hanging valleys. At Rajrappa (10 m), the Bhera River coming over from the Ranchi Plateau hangs above the Damodar River at its point of confluence with the latter. The Jonha Falls (25.9 m) is another example of this category of falls. The Ganga River hangs over its master stream,
6156-419: 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. During most of the Late Cretaceous, North America would be divided in two by the Western Interior Seaway , a large interior sea, separating Laramidia to the west and Appalachia to
6270-514: The Southern and Northern hemispheres, respectively. This meant weaker global winds, which drive the ocean currents, and resulted in less upwelling and more stagnant oceans than today. This is evidenced by widespread black shale deposition and frequent anoxic events . Tropical SSTs during the late Albian most likely averaged around 30 °C. Despite this high SST, seawater was not hypersaline at this time, as this would have required significantly higher temperatures still. On land, arid zones in
6384-487: The Subarnarekha River on the east to the Angarbira range to the west of Chaibasa, is a very fertile area. Saranda forest is reputed to have the best Sal forests in Asia. The Chota Nagpur Plateau has an attractive climate. For five to six months of the year, from October onward the days are sunny and bracing. The mean temperature in December is 23 °C (73 °F). The nights are cool and temperatures in winter may drop below freezing point in many places. In April and May
6498-403: The Tethys to the Arctic Ocean and enabling biotic exchange between the two oceans. At 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
6612-425: The ancestors of modern-day birds also diversified. They inhabited every continent, and were even found in cold polar latitudes. Pterosaurs were common in the early and middle Cretaceous, but as the Cretaceous proceeded they declined for poorly understood reasons (once thought to be due to competition with early birds , but now it is understood avian adaptive radiation is not consistent with pterosaur decline ). By
6726-408: The continental crust were covered with shallow seas. The Tethys Sea connecting the tropical oceans east to west also helped to warm the global climate. Warm-adapted plant fossils are known from localities as far north as Alaska and Greenland , while dinosaur fossils have been found within 15 degrees of the Cretaceous south pole . It was suggested that there was Antarctic marine glaciation in
6840-475: The country. Massive coal deposits are found in the central basin spreading over 2,883 square kilometres (1,113 sq mi). The important coalfields in the basin are Jharia , Raniganj , West Bokaro , East Bokaro , Ramgarh , South Karanpura and North Karanpura . Cretaceous The Cretaceous ( IPA : / k r ɪ ˈ t eɪ ʃ ə s / krih- TAY -shəss ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It
6954-443: The day temperature may cross 38 °C (100 °F) but it is very dry and not sultry as in the adjacent plains. The rainy season (June to September) is pleasant. The Chota Nagpur Plateau receives an annual average rainfall of around 1,400 millimetres (55 in), which is less than the rainforested areas of much of India and almost all of it in the monsoon months between June and August. The Chota Nagpur dry deciduous forests ,
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#17327724766207068-544: The early and mid-Cretaceous (becoming extinct during the late Cretaceous Cenomanian-Turonian anoxic event ), plesiosaurs throughout the entire period, and mosasaurs appearing in the Late Cretaceous. Sea turtles in the form of Cheloniidae and Panchelonioidea lived during the period and survived the extinction event. Panchelonioidea is today represented by a single species; the leatherback sea turtle . The Hesperornithiformes were flightless, marine diving birds that swam like grebes . Baculites , an ammonite genus with
7182-437: The east is uniform and gentle and is continued past the river, which bears to the south-east, into the Santhal Parganas and gradually disappears in the lower plains of Bengal. The western boundary of the plateau is formed by the deep bed of the Lilajan River .The southern boundary consists of the face of the higher plateau, as far as its eastern extremity, where for some distance a low and undistinguished watershed runs eastward to
7296-462: The east the Damodar River passes tamely into the Manbhum sector of lowest step of the Chota Nagpur plateau. The Palamu division generally lies at a lower height than the surrounding areas of Chota Nagpur Plateau. On the east the Ranchi plateau intrudes into the division and the southern part of the division merges with the Pat region. On the west are the Surguja highlands of Chhattishgarh and Sonbhadra district of Uttar Pradesh. The Son River touches
7410-399: The east, and on the north-west edge of the plateau Sendraili at 670 m (2,210 ft) and Mahuda at 734 m (2,409 ft) are the most prominent features. Isolated on the plateau, in the neighbourhood of Hazaribagh town are four hills of which the highest Chendwar rises to 860 m (2,810 ft). On all sides it has an exceedingly abrupt scarp, modified only on the south-east. In
7524-437: The east, then receded late in the period, leaving thick marine deposits sandwiched between coal beds. Bivalve palaeobiogeography also indicates that Africa was split in half by a shallow sea during the Coniacian and Santonian, connecting the Tethys with the South Atlantic by way of the central Sahara and Central Africa, which were then underwater. Yet another shallow seaway ran between what is now Norway and Greenland, connecting
7638-425: The economy, alongside growing steel production, power generation, and related infrastructure developments. However, agriculture remains important, with rice, maize, and pulses as staple crops. Chota Nagpur plateau is a store house of mineral resources such as mica , bauxite , copper , limestone , iron ore and coal . The Damodar valley is rich in coal, and it is considered as the prime centre of coking coal in
7752-535: The end of the AACS, which ended around 111 Ma with the Paquier/Urbino Thermal Maximum, giving way to the Mid-Cretaceous Hothouse (MKH), which lasted from the early Albian until the early Campanian. Faster rates of seafloor spreading and entry of carbon dioxide into the atmosphere are believed to have initiated this period of extreme warmth, along with high flood basalt activity. The MKH was punctuated by multiple thermal maxima of extreme warmth. The Leenhardt Thermal Event (LTE) occurred around 110 Ma, followed shortly by
7866-448: The end of the Cretaceous. The high sea level and warm climate of the Cretaceous meant large areas of the continents were covered by warm, shallow seas, providing habitat for many marine organisms. The Cretaceous was named for the extensive chalk deposits of this age in Europe, but in many parts of the world, the deposits from the Cretaceous are of marine limestone , a rock type that is formed under warm, shallow marine conditions. Due to
7980-411: The end of the period only three highly specialized families remained; Pteranodontidae , Nyctosauridae , and Azhdarchidae . The Liaoning lagerstätte ( Yixian Formation ) in China is an important site, full of preserved remains of numerous types of small dinosaurs, birds and mammals, that provides a glimpse of life in the Early Cretaceous. The coelurosaur dinosaurs found there represent types of
8094-407: The enlarged ridges—enriched the oceans in calcium ; this made the oceans more saturated, as well as increased 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
8208-528: The extinction fed on insects , larvae , worms , and snails, which in turn fed on dead plant and animal matter. Scientists theorise that these organisms survived the collapse of plant-based food chains because they fed on detritus . In stream communities , few groups of animals became extinct. Stream communities rely less on food from living plants and more on detritus that washes in from land. This particular ecological niche buffered them from extinction. Similar, but more complex patterns have been found in
8322-558: The first records of the gharial-like Neochoristodera , which appear to have evolved in the regional absence of aquatic neosuchian crocodyliformes. During the Late Cretaceous the neochoristodere Champsosaurus was widely distributed across western North America. Due to the extreme climatic warmth in the Arctic, choristoderans were able to colonise it too during the Late Cretaceous. In the seas, rays , modern sharks and teleosts became common. Marine reptiles included ichthyosaurs in
8436-602: The general land.The plateau is composed of Precambrian rocks (i.e., rocks more than about 540 million years old). The plateau has been formed during the Cenozoic by continental uplift due to tectonic forces. The Gondwana substrates attest to the plateau's ancient origin. It is part of the Deccan Plate , which broke free from the southern continent during the Cretaceous to embark on a 50-million-year journey that
8550-503: The genus Berriasella , but its use as a stratigraphic indicator has been questioned, as its first appearance does not correlate with that of C. alpina . The boundary is officially considered by the International Commission on Stratigraphy to be approximately 145 million years ago, but other estimates have been proposed based on U-Pb geochronology, ranging as young as 140 million years ago. The upper boundary of
8664-625: The group Maniraptora , which includes modern birds and their closest non-avian relatives, such as dromaeosaurs , oviraptorosaurs , therizinosaurs , troodontids along with other avialans . Fossils of these dinosaurs from the Liaoning lagerstätte are notable for the presence of hair-like feathers . Insects diversified during the Cretaceous, and the oldest known ants , termites and some lepidopterans , akin to butterflies and moths , appeared. Aphids , grasshoppers and gall wasps appeared. Rhynchocephalians (which today only includes
8778-412: The high sea level, there was extensive space for such sedimentation . Because of the relatively young age and great thickness of the system, Cretaceous rocks are evident in many areas worldwide. Chalk is a rock type characteristic for (but not restricted to) the Cretaceous. It consists of coccoliths , microscopically small calcite skeletons of coccolithophores , a type of algae that prospered in
8892-551: The highest rates of extinction and turnover. Thylacocephala , a class of crustaceans, went extinct in the Late Cretaceous. The first radiation of the diatoms (generally siliceous shelled, rather than calcareous ) in the oceans occurred during the Cretaceous; freshwater diatoms did not appear until the Miocene . Calcareous nannoplankton were important components of the marine microbiota and important as biostratigraphic markers and recorders of environmental change. The Cretaceous
9006-469: The impact of a large asteroid that formed the Chicxulub crater in the Gulf of Mexico. The end of the Cretaceous is defined by the abrupt Cretaceous–Paleogene boundary (K–Pg boundary), a geologic signature associated with the mass extinction that lies between the Mesozoic and Cenozoic Eras . The Cretaceous as a separate period was first defined by Belgian geologist Jean d'Omalius d'Halloy in 1822 as
9120-767: The last epoch of the Jurassic, the Tithonian, continued into the Berriasian, the first age of the Cretaceous. The North Atlantic seaway opened and enabled the flow of cool water from the Boreal Ocean into the Tethys. There is evidence that snowfalls were common in the higher latitudes during this age, and the tropics became wetter than during the Triassic and Jurassic. Glaciation was restricted to high- latitude mountains, though seasonal snow may have existed farther from
9234-575: The late Valanginian (~ 134 million years ago) found in Israel and Italy, initially at low abundance. Molecular clock estimates conflict with fossil estimates, suggesting the diversification of crown-group angiosperms during the Late Triassic or the Jurassic, but such estimates are difficult to reconcile with the heavily sampled pollen record and the distinctive tricolpate to tricolporoidate (triple grooved) pollen of eudicot angiosperms. Among
9348-465: The late Cretaceous, and all else that depended on them suffered, as well. Herbivorous animals, which depended on plants and plankton as their food, died out as their food sources became scarce; consequently, the top predators , such as Tyrannosaurus rex , also perished. Yet only three major groups of tetrapods disappeared completely; the nonavian dinosaurs , the plesiosaurs and the pterosaurs . The other Cretaceous groups that did not survive into
9462-574: The latest Albian. Approximately 94 Ma, the Cenomanian-Turonian Thermal Maximum occurred, with this hyperthermal being the most extreme hothouse interval of the Cretaceous and being associated with a sea level highstand. Temperatures cooled down slightly over the next few million years, but then another thermal maximum, the Coniacian Thermal Maximum, happened, with this thermal event being dated to around 87 Ma. Atmospheric CO 2 levels may have varied by thousands of ppm throughout
9576-711: The l’Arboudeyesse Thermal Event (ATE) a million years later. Following these two hyperthermals was the Amadeus Thermal Maximum around 106 Ma, during the middle Albian. Then, around a million years after that, occurred the Petite Verol Thermal Event (PVTE). Afterwards, around 102.5 Ma, the Event 6 Thermal Event (EV6) took place; this event was itself followed by the Breistroffer Thermal Maximum around 101 Ma, during
9690-517: The middle Cretaceous, becoming the dominant group of land plants by the end of the period, coincident with the decline of previously dominant groups such as conifers. The oldest known fossils of grasses are from the Albian , with the family having diversified into modern groups by the end of the Cretaceous. The oldest large angiosperm trees are known from the Turonian (c. 90 Mya) of New Jersey, with
9804-684: The middle of the Cretaceous. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth by the end of the Cretaceous, coincident with the decline and extinction of previously widespread gymnosperm groups. The Cretaceous (along with the Mesozoic) ended with the Cretaceous–Paleogene extinction event , a large mass extinction in which many groups, including non-avian dinosaurs, pterosaurs , and large marine reptiles , died out, widely thought to have been caused by
9918-408: The most promising candidates for fixing the Jurassic–Cretaceous boundary. In particular, the first appearance Calpionella alpina , coinciding with the base of the eponymous Alpina subzone, has been proposed as the definition of the base of the Cretaceous. The working definition for the boundary has often been placed as the first appearance of the ammonite Strambergella jacobi , formerly placed in
10032-496: The north-western corner of the division and then forms the state boundary for about 72 kilometres (45 mi). The general system of the area is a series of parallel ranges of hills running east and west through which the North Koel River passes. The hills in the south are the highest in the area, and the picturesque and isolated cup-like Chhechhari valley is surrounded by lofty hills on every side. Lodh Falls drops from
10146-605: The north. The highest hills in this area are called after the villages of Kasiatu, Hesatu and Hudu, and rise fronting the south 180 m (600 ft) above the general level of the plateau. Further east along the southern face a long spur projects right up to the Damodar river where it ends in Aswa Pahar, elevation 751 metres (2,465 ft). At the south-eastern corner of the plateau is Jilinga Hill at 932 metres (3,057 ft). Mahabar Jarimo at 666 m (2,185 ft) and Barsot at 660 m (2,180 ft) stand in isolation to
10260-824: The oceans. Extinction was more severe among animals living in the water column than among animals living on or in the seafloor. Animals in the water column are almost entirely dependent on primary production from living phytoplankton, while animals living on or in the ocean floor feed on detritus or can switch to detritus feeding. The largest air-breathing survivors of the event, crocodilians and champsosaurs , were semiaquatic and had access to detritus. Modern crocodilians can live as scavengers and can survive for months without food and go into hibernation when conditions are unfavorable, and their young are small, grow slowly, and feed largely on invertebrates and dead organisms or fragments of organisms for their first few years. These characteristics have been linked to crocodilian survival at
10374-653: The oldest records of Angiosperm macrofossils are Montsechia from the Barremian aged Las Hoyas beds of Spain and Archaefructus from the Barremian-Aptian boundary Yixian Formation in China. Tricolpate pollen distinctive of eudicots first appears in the Late Barremian, while the earliest remains of monocots are known from the Aptian. Flowering plants underwent a rapid radiation beginning during
10488-419: The plateau’s ecological resources. About 6 percent of the ecoregion's area is within protected areas, comprising 6,720 square kilometres (2,590 sq mi) in 1997. The largest are Palamau Tiger Reserve and Sanjay National Park . The Chota Nagpur region is a culturally rich area with a diverse population comprising various indigenous tribes and ethnic communities. The region is home to tribes like
10602-452: The poles. Many of the dominant taxonomic groups present in modern times can be ultimately traced back to origins in the Cretaceous. During this time, new groups of mammals and birds appeared, including the earliest relatives of placentals & marsupials ( Eutheria and Metatheria respectively), and the earliest crown group birds. Acanthomorph fish, the most diverse group of modern vertebrates, appeared in aquatic habitats around
10716-523: The poles. After the end of the first age, however, temperatures began to increase again, with a number of thermal excursions, such as the middle Valanginian Weissert Thermal Excursion (WTX), which was caused by the Paraná-Etendeka Large Igneous Province's activity. It was followed by the middle Hauterivian Faraoni Thermal Excursion (FTX) and the early Barremian Hauptblatterton Thermal Event (HTE). The HTE marked
10830-539: The precipitous escarpments of the plateau and enter the area of significantly lower elevation. The North Karo River has formed the 17 m (56 ft) high Pheruaghaugh Falls at the southern margin of the Ranchi plateau. Such falls are called scarp falls. Hundru Falls (75 m) on the Subarnarekha River near Ranchi, Dassam Falls (39.62 m) on the Kanchi River, east of Ranchi, Sadni Falls (60 m) on
10944-412: The principal food of mosasaurs , a group of giant marine lizards related to snakes that became extinct at the boundary. Omnivores , insectivores , and carrion -eaters survived the extinction event, perhaps because of the increased availability of their food sources. At the end of the Cretaceous, there seem to have been no purely herbivorous or carnivorous mammals . Mammals and birds that survived
11058-547: The punctuation mark at the end of a progressive decline in biodiversity during the Maastrichtian age. The result was the extinction of three-quarters of Earth's plant and animal species. The impact created the sharp break known as the K–Pg boundary (formerly known as the K–T boundary). Earth's biodiversity required substantial time to recover from this event, despite the probable existence of an abundance of vacant ecological niches . Despite
11172-806: The region dates back to the Mesolithic-Chalcolithic period, as evidenced by various ancient cave paintings. Stone tools from the Chota Nagpur Plateau indicate human activity dating back to the Mesolithic and Neolithic periods. Additionally, ancient cave paintings at Isko in Hazaribagh district date to the Meso-Chalcolithic period (9000–5000 BCE). The region has seen an dominance of non-tribal populations over time, owing to growth in mining and industrial activities. Large-scale extraction industries in coal and iron mining dominate
11286-744: The rise of angiosperms, during the Jurassic and the Early Cretaceous, the higher flora was dominated by gymnosperm groups, including cycads , conifers , ginkgophytes , gnetophytes and close relatives, as well as the extinct Bennettitales . Other groups of plants included pteridosperms or "seed ferns", a collective term that refers to disparate groups of extinct seed plants with fern-like foliage, including groups such as Corystospermaceae and Caytoniales . The exact origins of angiosperms are uncertain, although molecular evidence suggests that they are not closely related to any living group of gymnosperms. The earliest widely accepted evidence of flowering plants are monosulcate (single-grooved) pollen grains from
11400-451: The severity of the K-Pg extinction event, there were significant variations in the rate of extinction between and within different clades . Species that depended on photosynthesis declined or became extinct as atmospheric particles blocked solar energy . As is the case today, photosynthesizing organisms, such as phytoplankton and land plants , formed the primary part of the food chain in
11514-601: The south it falls almost sheer in a swoop of 670 m (2,200 ft) to the bed of Bokaro River , below Jilinga Hill. Seen from the north the edge of this plateau has the appearance of a range of hills, at the foot of which (on the Koderma plateau) runs the Grand Trunk Road and NH 2 (new NH19 ). The Koderma plateau is also referred to as the Hazaribagh lower plateau or as the Chauparan-Koderma-Girighi sub-plateau. The northern face of
11628-422: The strong regionality of most biostratigraphic markers, and the lack of any chemostratigraphic events, such as isotope excursions (large sudden changes in ratios of isotopes ) that could be used to define or correlate a boundary. Calpionellids , an enigmatic group of planktonic protists with urn-shaped calcitic tests briefly abundant during the latest Jurassic to earliest Cretaceous, have been suggested as
11742-501: The survival and movement of native wildlife, particularly larger species such as elephants, tigers, and leopards that require extensive, undisturbed areas. Some conservation efforts are underway, including the establishment of protected areas and wildlife corridors aimed at reconnecting fragmented habitats. However, challenges remain due to limited enforcement of conservation policies and the economic dependence of local communities on mining and agriculture, which places continual pressure on
11856-633: The terrestrial fauna of the late Cretaceous Hell Creek Formation . Other important Cretaceous exposures occur in Europe (e.g., the Weald ) and China (the Yixian Formation ). In the area that is now India, massive lava beds called the Deccan Traps were erupted in the very late Cretaceous and early Paleocene. Palynological evidence indicates the Cretaceous climate had three broad phases:
11970-558: The territory was changed. The parganas of Ramgarh, Kharagdiha, Kendi and Kunda became parts of the South-West Frontier Agency and were formed into a division named Hazaribag as the administrative headquarters. In 1854, the designation of South-West Frontier Agency was changed to Chota Nagpur Division and it began to be administered as a Non-regulation province under the Lieutenant Governor of
12084-572: The then Bihar. In 1855-56 there was the great uprising of the Santhals against the British but was brutally suppressed. The Langta Baba Samadhi Sthal is located in Kharagdiha, about 30 km northwest of the town on the road towards Jamua. Langta Baba is revered by both Hindus and Muslims alike. People offer chaadars (shawls and blankets) to his samadhi as a ritual, and it is believed that
12198-483: The trunk having a preserved diameter of 1.8 metres (5.9 ft) and an estimated height of 50 metres (160 ft). During the Cretaceous, ferns in the order Polypodiales , which make up 80% of living fern species, would also begin to diversify. On land, mammals were generally small sized, but a very relevant component of the fauna , with cimolodont multituberculates outnumbering dinosaurs in some sites. Neither true marsupials nor placentals existed until
12312-789: The ultimate end of the Tithonian-early Barremian Cool Interval (TEBCI). During this interval, precession was the dominant orbital driver of environmental changes in the Vocontian Basin. For much of the TEBCI, northern Gondwana experienced a monsoonal climate. A shallow thermocline existed in the mid-latitude Tethys. The TEBCI was followed by the Barremian-Aptian Warm Interval (BAWI). This hot climatic interval coincides with Manihiki and Ontong Java Plateau volcanism and with
12426-628: The very end, but a variety of non-marsupial metatherians and non-placental eutherians had already begun to diversify greatly, ranging as carnivores ( Deltatheroida ), aquatic foragers ( Stagodontidae ) and herbivores ( Schowalteria , Zhelestidae ). Various "archaic" groups like eutriconodonts were common in the Early Cretaceous, but by the Late Cretaceous northern mammalian faunas were dominated by multituberculates and therians , with dryolestoids dominating South America . The apex predators were archosaurian reptiles , especially dinosaurs , which were at their most diverse stage. Avians such as
12540-575: The west it narrows and descends slowly in the neighbourhood of Simaria and Jabra where it curves to the south and connects with the Ranchi Plateau through Tori pargana. It is generally separated from the Ranchi plateau by the Damodar trough. The western portion of Hazaribagh plateau constitutes a broad watershed between the Damodar drainage on the south and the Lilajan and Mohana rivers on
12654-556: The western spurs of Parasnath Hills . The drainage to the south of this low line passes by the Jamunia River to the Damodar. The Damodar basin forms a trough between the Ranchi and Hazaribagh plateaus resulting from enormous fractures at their present edges, which caused the land between to sink to a great depth and incidentally preserved from denudation by the Karanpura, Ramgarh and Bokaro coalfields. The northern boundary of
12768-476: The wish made here by a true devotee always gets fulfilled. Chota Nagpur plateau The Chota Nagpur Plateau is a plateau in eastern India, which covers much of Jharkhand state as well as adjacent parts of Chhattisgarh , Odisha , West Bengal and Bihar . The Indo-Gangetic plain lies to the north and east of the plateau, and the basin of the Mahanadi river lies to the south. The total area of
12882-654: Was followed by the Aptian-Albian Cold Snap (AACS) that began about 118 Ma. A short, relatively minor ice age may have occurred during this so-called "cold snap", as evidenced by glacial dropstones in the western parts of the Tethys Ocean and the expansion of calcareous nannofossils that dwelt in cold water into lower latitudes. The AACS is associated with an arid period in the Iberian Peninsula . Temperatures increased drastically after
12996-630: Was interrupted by the collision with the Eurasian continent. The northeastern part of the Deccan Plateau , where this ecoregion sits, was the first area of contact with Eurasia. The history of metamorphism, granitic activities and igneous intrusions in the Chotanagpur area continued for a period from over 1000 Ma to 185 Ma. The Chota Nagpur region has a notable fossil presence. The fossil-rich sedimentary units host fossilized remains across
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