Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

Vinod C. Tewari ¹, M. Fasiullah Qureshy ¹

Affiliations
1 Wadia Institute of Himalayan Geology, Dehra Dun 248001, IN

Abstract

Algal pisolites, oncoids, columnar stromatolites and columnar layered stromatolites have been recorded from cherty dolomitic limestones from Upper Krol and Lower Tal formations. The algal mat facies show bird's eye structures and irregular fenestral fabric suggesting an intertidal supratidal environment of deposition for Upper Krol (D and E) Formation of Garhwal syncline. The basal Lower Tal Formation of Mussoorie syncline also represents a complex algal oncoidal-stromatolitic (protected tidal flat/lagoonal) facies with restricted circulation. The association of phosphorite with stromatolites and oncoids proves the phosphorite to be deposited in a shallow water environment. The presence of pyrite and associated black shales indicate an erobic condition.

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Vinod C. Tewari ¹

Affiliations
1 Wadia Institute of Himalayan Geology, Dehradun, IN

Abstract

No Abstract.

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Vinod C. Tewari ¹, B. S. Paliwal ², K. Venkatakrishna ³

Affiliations
1 Wadia Institute of Himalayan Geology, Dehra Dun - 248 001, Uttaranchal, IN
2 J.N.V. University, Jodhpur - 340 005, Rajasthan, IN
3 Centre for Laser Spectroscopy, Manipal Academy of Higher Education, Manipal, IN

Abstract

Aromatic amino acids Phenylalanine, prosine and Tryptophan have been identified for the first time from the Didwana-Rajod meteorite which fell on Earth (most probably from asteroid belt between Mars and Jupiter in our Solar system) in 1991 near Didwana in Nagaur district of Rajasthan.

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