A review of the stratigraphy of Marwar Supergroup of west-central Rajasthan |
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Authors: | D K Pandey Tej Bahadur |
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Institution: | (1) Department of Geology, University of Rajasthan, Jaipur, 302 055, India |
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Abstract: | The lithostratigraphy, depositional environment and age of the Marwar Supergroup have been reviewed in the light of report
of δ13C depletion recorded in the carbonates of the Bilara Group (middle part of Marwar Supergroup) and discovery of trilobite-like
trace fossils from the ·Red bedsŽ of Nagaur Group (upper part of Marwar Supergroup). The δ13C depletion observed in Bilara carbonates is not a result of glaciation rather due to rapid burial and poor water circulation
in the low energy water of the protected basin. Secondly, the trace fossils are, in fact, traces of notostracan crustaceans
found in shallow fluvial and shallow lacustrine environment. The present paper also records a spiral, burrowing trace-fossil,
possibly Gyrolithes, from a cross-bedded sandstone of the Jodhpur Group. |
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Keywords: | Lithostratigraphy Depositional environment Age Gyrolithes Marwar Supergroup Rajasthan |
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