Significance of transition between Talchir Formation and Karharbari Formation in Lower Gondwana basin evolution — A study in West Bokaro Coal basin, Jharkhand, India

Basal part of the Gondwana Supergroup represented by Talchir and Karharbari Formations (Permo-Carboniferous) records an abrupt change-over from glacio-marine to terrestrial fluviolacustrine depositional environment. The contact between the two is an unconformity. Facies analysis of the glacio-marine...

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Bibliographic Details
Published in:Journal of Earth System Science 2005-06, Vol.114 (3), p.275-286
Main Authors: Bhattacharya, H. N., Chakraborty, Abhijit, Bhattacharya, Biplab
Format: Article
Language:English
Subjects:
Basins
Carboniferous
Evolutionary biology
Geology
Gondwana
Lake deposits
Sediment
Sedimentary facies
Sediments
Storms
Troughs
Unconformity
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Summary:Basal part of the Gondwana Supergroup represented by Talchir and Karharbari Formations (Permo-Carboniferous) records an abrupt change-over from glacio-marine to terrestrial fluviolacustrine depositional environment. The contact between the two is an unconformity. Facies analysis of the glacio-marine Talchir Formation reveals that basal glaciogenic and reworked glaciogenic sediments are buried under storm influenced inner and outer shelf sediments. Facies associations of the Karharbari Formation suggest deposition as fluvio-lacustrine deposits in fault-controlled troughs. An attempt has been made in this paper to explain the sedimentation pattern in Talchir and Karharbari basins, and the abrupt change-over from glacio-marine to terrestrial fluviolacustrine depositional environment in terms of glacio-isostacy.[PUBLICATION ABSTRACT]
ISSN:0253-4126
0973-774X
DOI:10.1007/BF02702950