Floristic, age and stratigraphical position of fossiliferous band in Chitra mine area, Saharjuri Outlier, Deogarh coalfield, Bihar

Bajpai, Usha

doi:10.54991/jop.1988.1628

Cited by 5 publications

(10 citation statements)

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“…External morphological study of all the known records of Noeggerathiopsis in the Indian Lower Gondwana flora suggests that they belong to only one species, N. hislopii (Bunbury) Feistmantel 1879. The species instituted on cuticular features also show similar external morphological character (Pant & Verma, 1964a;Lele & Maithy, 1964;Bajpai, 1990).…”

Section: Genus-noeggeratbiopsis Feistmantel 1879mentioning

confidence: 85%

Plant fossil assemblages from the Barakar Formation of Raniganj Coalfield, India

Srivastava¹

1990

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Morphological and systematic investigation of plant fossils namely Equisetales (Phyllotheca, Lelstotheca, Phyllothecan cone, Trizygia), Filicales (Neomariopteris, Palasthalia gen. nov. showing sterile frond with auriculate base and pecopteroid venation pattern), glossopterids (leaves of Euryphyllum, Gangamopteris, Glossopteris, Palaeovittaria, Gondwanophyllites, Maheshwariphyllum gen. nov. having complete midrib and dichotomizing lateral veins, Parth,, Scutum fructifications), Cordaitales (Noeggerathiopsis, Cordaites), detached seeds of Samaropsis and Cordaicarpus and scale leaves from different seams of Barakar Formation of Raniganj Coalfield are described. The flora of the lower seams (nos. B II-B IV) is comparatively more diversified and shows affinity with the Karharbari flora, whereas the flora of upper seams (nos. B V-B VII) is monotonous in composition in being mostly represented by Glossopteris species. The composition of the flora in relation to evolution and climatic changes suggests lineage towards the development of midrib character in the glossopterid leaves and existence of temperate climate with a change from warm moist to warm dry condition.

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Section: Genus-noeggeratbiopsis Feistmantel 1879mentioning

confidence: 85%

Plant fossil assemblages from the Barakar Formation of Raniganj Coalfield, India

Srivastava¹

1990

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“…Major extinerions have occurred at geologic time boundaries, such as Frasnian/Fammennian, Ordovician/Silurian, Permian/Triassic, Triassic/Jurassic and Cretaceous/Tertiary Plants seem ro have survived the great mass extinction events bener than animals; for example, at the Triassic/Jurassic boundary, gyrnnosperms of similar morphology dominated the vegetation on either side as did the angiosperms across the Cretaceous/ TenialY (KIT boundary) (Ricklefs et aI., 1990) With the amelioration of the climatic conditions, the flora diversified and some new elements, viz., BOliychiopsis, };'lIryphylllll11, Rlibidgea and Bliriadia appeared in the late Early Permian (Karharbari "Formation"). Species of the genera Noeggerathiopsis, Gangamopteris and Glossopteris also increased in number (Bajpai, 1990). By the end of Karharbari the number of palynotaxa almost doubled, the species multiplied four-fold, pteridophyric spores contributing ro about one third of the population.…”

Section: Past Climatic Changes and Diversitymentioning

confidence: 96%

Environmental change and biological diversity: Present, past and future

Raghubanshi

Singh

1990

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The present paper reviews the current distribution and factors determining the level of biological diversity. Past climate changes causing mass extinctions, lessons drawn from these past events and the impact of future climate change on biological diversity in its broadest sense are also considered. Large scale changes in vegetation zones and composition, over extensive parts of the globe are indicated. Displacement of isotherms due to rise in global temperatures would necessitate very rapid species shifts which may be possible only with human assistance except for plants propagated by spores or dust seeds. Rates of migration and behaviour of the migrating species will determine their range shift capabilities. Differences in migration rates may result in new combinations of species because of dissociation of communities into their component species. Species rigidly associated to a particular set of environmental conditions may well become extinct Characteristics such as large population size, broad geographical distribution and high dispersal potentials will protect species from extinction. Increased pressure from invaders, increased frequency of epidemics and alteration of productivity and species distributions are indicated. Elevated sea water temperatures may badly damage sea flora and fauna as is exemplified by present day El nino effects. Destruction of coastal habitats due to sea level rise may affect birds and fishes using sail marshes, estuaries and islets as breeding ground. Island species will be severely affected both due to reduced area and limitations of latitudinal migration. Changes in precipitation pattern may result in reduced avian and mammalian populations in many parts of the world.

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“…1, fig. 3) from Jayanti Coalfield, Maithy (1969) from Daltonganj Coalfield, Bajpai (1990) from Deogarh Coalfield and Srivastava (1992) from Raniganj Coalfield. Recently C. zeilleri was reported from Barakar Formation of Umrer Coalfield, Wardha Basin (Tewari et al, 2012).…”

Section: 10)mentioning

confidence: 99%

Further contribution to the mega- and microfossil assemblages from the Johilla-Ganjra Nala confluence, South Rewa Gondwana Basin, Madhya Pradesh, India

Gautam¹,

Pillai²,

Goswami

et al. 2013

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The present paper deals with mega- and microfossils recovered from the Early Permian sediments of the Johilla-Ganjra Nala confluence of Johilla Coalfield, Madhya Pradesh. Megafossils include Gangamopteris major, G. cyclopteroides, Glossopteris indica, G. gigas, G. conspicua, G. mohudaensis, Noeggerathiopsis hislopii, Samaropsis goraiensis, Cordaicarpus zeilleri, Alatocarpus indicus, few platyspermic seeds and Equisetalean axes. The palynological studies reveal that coal-bearing beds contain dominance of monosaccate pollen (Parasaccites, Plicatipollenites and Pachysaccus) in association with Callumispora gretensis, Crucisaccites monoletus, Barakarites indicus, Faunipollenites varius, Lunatisporites diffusus and Crescentipollenites fuscus indicating an Early Permian age to the coal beds exposed near the confluence of Johilla River and Ganjra Nala. The mega- and microflora recorded from these beds indicate a transitional zone of the Upper Karharbari and Lower Barakar formations. The study further suggests that the climatic conditions of Son Valley were cooler than the Damodar Basin.

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Floristic, age and stratigraphical position of fossiliferous band in Chitra mine area, Saharjuri Outlier, Deogarh coalfield, Bihar

Cited by 5 publications

References 1 publication

Plant fossil assemblages from the Barakar Formation of Raniganj Coalfield, India

Plant fossil assemblages from the Barakar Formation of Raniganj Coalfield, India

Environmental change and biological diversity: Present, past and future

Further contribution to the mega- and microfossil assemblages from the Johilla-Ganjra Nala confluence, South Rewa Gondwana Basin, Madhya Pradesh, India

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