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A Re-Evaluation of the Stratigraphy of the Lameta-Jabalpur Contact Around Jabalpur, M.P.


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1 Department of Geological Sciences, Jadavpur University, Calcutta, India
     

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There has been some disagreement between Medlicott and Matley as regards the stratigraphy of the Lameta-Jabalpur contact in the type area. On the basis of fieid evidences integrated with petrologic data, it is shown in the present work that there is a well-marked unconformity at this contact, and the paraconformity observed in the eastern part actually passes into an erosional unconformity of a greater magnitude towards the south-west. The "apparent presumption of an unconformity" by Medlicott is thus confirmed. Post-Jabalpur tectonism, visualised on the basis of this presumption of the unconformity, although a cause for Lameta sedimentation, did not effectively change the tectonic framework in the type area.
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  • A Re-Evaluation of the Stratigraphy of the Lameta-Jabalpur Contact Around Jabalpur, M.P.

Abstract Views: 246  |  PDF Views: 2

Authors

S. K. Chanda
Department of Geological Sciences, Jadavpur University, Calcutta, India
Ajit Bhattacharyya
Department of Geological Sciences, Jadavpur University, Calcutta, India

Abstract


There has been some disagreement between Medlicott and Matley as regards the stratigraphy of the Lameta-Jabalpur contact in the type area. On the basis of fieid evidences integrated with petrologic data, it is shown in the present work that there is a well-marked unconformity at this contact, and the paraconformity observed in the eastern part actually passes into an erosional unconformity of a greater magnitude towards the south-west. The "apparent presumption of an unconformity" by Medlicott is thus confirmed. Post-Jabalpur tectonism, visualised on the basis of this presumption of the unconformity, although a cause for Lameta sedimentation, did not effectively change the tectonic framework in the type area.