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Pandya, K. L.
- Some Unusual Structures in the Talchir Group, Talchir Gondwana Basin, Orissa
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Authors
Affiliations
1 P. G. Department of Geology, Utkal University, Bhubaneswar 751 004, IN
1 P. G. Department of Geology, Utkal University, Bhubaneswar 751 004, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 30, No 4 (1987), Pagination: 305-308Abstract
Some unusual structures resembling algal nodules are described from the limestones of the Talchir Group. Talchir Gondwana basin, Orissa. The external form of these structures and the petrography of the enclosing limestones points to an algal origin.- Lithofacies and Environments of Deposition of a Part of Talchir Group, Talchir Gondwana Basin, Orissa
Abstract Views :158 |
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Authors
Affiliations
1 P. G. Department of Geology, Utkal University, Vani Vihar, Bhubaneswar 751 004, IN
1 P. G. Department of Geology, Utkal University, Vani Vihar, Bhubaneswar 751 004, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 36, No 2 (1990), Pagination: 175-186Abstract
The Talchir sequence is divisible into three units named informally as 'Unit A', 'Unit B' and 'Unit C' from the base to the top. Eleven lithofacies have been recognised. The lithofacies associations and their inter-relationships suggest deposition of Unit A in a network of alluvial braided stream environment merging into a lake. Unit B represents three phases of delta advance into a lake basin with the development of prodelta, delta slope, subaqueous delta platform and deltaic distributary sediments. The sediments of Unit C were laid down in a quiet lake basin of moderate depth with the sedimentation being from suspension and chemical precipitation followed by intermittent clastic density underflows.Keywords
Sedimentology, Talchir Group, Gondwana, Orissa.- Palaeocurrent Pattern and Provenance of a Part of Gondwana Succession, Talchir Basin, Orissa
Abstract Views :176 |
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Authors
Affiliations
1 P.G.Department of Geology, Utkal University, Vani Vihar, Bhubaneswar - 75l 004, IN
1 P.G.Department of Geology, Utkal University, Vani Vihar, Bhubaneswar - 75l 004, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 50, No 4 (1997), Pagination: 425-433Abstract
The Talchir Group and the Karharbari Formation including a Boulder Gravel Unit of Damuda Group had a predominant northerly palaeoflow with a radiating sediment dispersal pattern suggesting a transverse filling of the basin. In contrast, the Barakar sedimentation had a unidirectional northwesterly palaeoflow implying an axial filling. The sediments were largely derived from the Eastern Ghat source which occurs along the southern boundary of the basin. The Talchir Group represents a denudation phase of source area with declining relief manifested by a decreasing mean grain size and increasing complexity in the heavy mineral suite due to unroofing of low rank metamorphic rocks at the source. The Damuda Group represents a syn-and post-tectonic phase of sedimentation displaying differences in tectonic style manifested by source area uplift, basin subsidence and steepening of alluvial surface documented by upward increase in grain size, increased complexity in heavy minerals by exposure of high rank metamorphic rocks at source and post-tectonic drainage deflection towards northwest during Barakar sedimentation.Keywords
Sedimentology, Palaeocurrent Studies, Gondwana. Talchir Basin, Orissa.- Quantitative Relationship between Net Subsidence and Coal Cycles in Barakar Formation, Talchir Coalfield, Orissa
Abstract Views :163 |
PDF Views:2
Authors
R. N. Hota
1,
K. L. Pandya
1
Affiliations
1 P. G. Department of Geology, Utkal University, Bhubaneswar - 751 004, Orissa, IN
1 P. G. Department of Geology, Utkal University, Bhubaneswar - 751 004, Orissa, IN