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Neoarchaean Stromatolites from the Dharwar Supergroup, India


Affiliations
1 Department of Geology, Bangalore University, Bengaluru 560 056, India
2 Birbal Sahni Institute of Palaeosciences, 53 University Road, Lucknow 226 007, India
3 Bhoogarbhdhama, No. 19, 1st Main, 4th Cross Road, New Maruthi Nagar Extension, Near MEI International School, Kempapura Road, Chikkabanavara, Bengaluru 560 090, India
4 No. 291, JHBCS Layout, Near Dayanand Sagar College, Bengaluru 560 111, India
 

A new occurrence of Neoarchean stromatolite, older than 2600 Ma, has been found in the dolomite beds of Aleshpur Formation of the Chitradurga Group in the Shimoga Schist Belt, western Dharwar Craton. The occurrence is near Shanti Sagara lake (Sulekere) in the Davangere district of Karnataka. Stratiform, laminated, columnar with some showing branching forms indicate an advanced stage of evolution of stromatolites. The newly found stromatolite occurrence is an important addition to the inventory of Archaean stromatolites.

Keywords

Archaean, Dharwar Craton, Shimoga Schist Belt, Stromatolite.
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  • Neoarchaean Stromatolites from the Dharwar Supergroup, India

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Authors

Chethan Kumar
Department of Geology, Bangalore University, Bengaluru 560 056, India
Yogmaya Shukla
Birbal Sahni Institute of Palaeosciences, 53 University Road, Lucknow 226 007, India
Mukund Sharma
Birbal Sahni Institute of Palaeosciences, 53 University Road, Lucknow 226 007, India
S. B. Harish Kumar
Bhoogarbhdhama, No. 19, 1st Main, 4th Cross Road, New Maruthi Nagar Extension, Near MEI International School, Kempapura Road, Chikkabanavara, Bengaluru 560 090, India
N. Malarkodi
Department of Geology, Bangalore University, Bengaluru 560 056, India
Saleem Ahmed Khan
No. 291, JHBCS Layout, Near Dayanand Sagar College, Bengaluru 560 111, India

Abstract


A new occurrence of Neoarchean stromatolite, older than 2600 Ma, has been found in the dolomite beds of Aleshpur Formation of the Chitradurga Group in the Shimoga Schist Belt, western Dharwar Craton. The occurrence is near Shanti Sagara lake (Sulekere) in the Davangere district of Karnataka. Stratiform, laminated, columnar with some showing branching forms indicate an advanced stage of evolution of stromatolites. The newly found stromatolite occurrence is an important addition to the inventory of Archaean stromatolites.

Keywords


Archaean, Dharwar Craton, Shimoga Schist Belt, Stromatolite.

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DOI: https://doi.org/10.18520/cs%2Fv125%2Fi4%2F435-441