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Somnath Dasgupta ¹

Affiliations
1 Department of Geological Sciences, Jadavpur University, Calcutta - 700 032, IN

Abstract

No Abstract.

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Asru K. Chaudhuri ¹, Somnath Dasgupta ², Goutam Bandyopadhyay ², Subir Sarkar ², P. C. Bandyopadhyay ², K. Gopalan ³

Affiliations
1 Geological Studies, Unit, Indian Statistical Institute, Calcutta, IN
2 Department of Geological Sciences, Jadavpur University, Calcutta 700032, IN
3 National Geophysical Research Institute, Hyderabad, IN

Abstract

The Proterozoic sequence around Adilabad, Andhra Pradesh comprises a distinct lithostratigraphic unit of 'Group' status and has been given the name Penganga Group. The Penganga Group has been classified into three Formations which are, in order of younging, Pranhita Sandstone, Chanda Limestone and Sat Nala Shale. The sequence is dominated by limestones and shales which were deposited in relatively deep water environment and, thus, contrast sharply with the conglomerate, sandstone and shallow water limestones of the Pakhal Group. Radiometric dating of fresh glauconites from middle part of the Penganga Group gives an age of 770 ± 30 Ma. Thus, the Penganga Group is the youngest of all other Proterozoic sequences in Pranhita-Godavari Valley.

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E. V. S. S. K. Babu ¹, V. M. Tiwari ¹, Somnath Dasgupta ²

Affiliations
1 CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad 500 007, IN
2 Indian Institute of Science Education and Research, Kolkata, Mohanpur, Nadia 741 246, IN

Abstract

Understanding the geodynamic processes that underpin the formation of continents is fundamental to decoding the complex evolutionary history of the Earth and the terrestrial planets. In the Phanerozoic Eon, the paradigm of plate tectonics and Wilson-cycle processes not only constitutes a robust and unifying mechanism to explain the orogenic processes of crust formation, recycling and preservation, but also the complex interactions among the solid earth, biosphere, hydrosphere and atmosphere relevant to evolution of life and climate. However, there is yet no consensus on a global geodynamic framework for the Hadean and Archean Eons.

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Somnath Dasgupta ¹

Affiliations
1 Indian Statistical Institute, Kolkata 700 108, India and Indian Institute of Science Education and Research, Kolkata 741 246, India, IN

Abstract

No Abstract.

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