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Kushwaha, R. A. S.
- Ichnology of Bhuban and Boka Bil Formations, Oligocene-Miocene Deposits of Manipur Western Hill, Northeast India
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Authors
Affiliations
1 Department of Geology, Imphal College, Imphal - 795 001, IN
2 PG Department of Geology, RTM Nagpur University, Nagpur - 440 001, IN
3 Department of Earth Sciences, Manipur University, Imphal - 795 003, IN
1 Department of Geology, Imphal College, Imphal - 795 001, IN
2 PG Department of Geology, RTM Nagpur University, Nagpur - 440 001, IN
3 Department of Earth Sciences, Manipur University, Imphal - 795 003, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 76, No 6 (2010), Pagination: 573-586Abstract
Oligocene-Miocene deposits of Bhuban and Boka Bil Formations, Surma Group, Manipur Western Hill consist of well preserved ichnofossil assemblages. These formations are represented by eight lithofacies such as Massive sandstone (Sm), Rippled marked argillaceous sandstone (Sr), Wavy laminated sandstone-siltstone-silty shale (Sw), Laminated shale (Fl), Massive mudstone (Fm), Trough cross-bedded sandstone (St), Lenticular laminated sandstonesiltstone- silty shale (Sll) and Laminated to massive sandstone-siltstone (Ssc). Fifteen ichnospecies were identified, which further categories into Skolithos, Cruziana, and Skolithos/Cruziana ichnofacies. Overall distribution pattern and behavioural nature of the ichnoassemblage and sedimentological attributes suggests that the sediments of Bhuban and Boka Bil Formations were deposited under frequent fluctuating sea level, moderate to strong energy condition, subtidal to lower intertidal environment, rich in organic nutrients.Keywords
Ichnofossil, Depositional Environment, Oligocene-Miocene, Surma Group, Manipur.
- Plant Remains from the Laisong Formation of Manipur
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Authors
Affiliations
1 Department of Geology, Imphal College, Imphal - 795 001, IN
2 Department of Earth Sciences, Manipur University, Imphal - 795 003, IN
3 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
1 Department of Geology, Imphal College, Imphal - 795 001, IN
2 Department of Earth Sciences, Manipur University, Imphal - 795 003, IN
3 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 79, No 3 (2012), Pagination: 287-294Abstract
Some plant remains are described from the Laisong Formation (Barail Group) of Thoubal and Senapati districts of Manipur. The flora is diverse comprising gymnospermous, monocotyledonous and dicotyledonous forms and indicates tropical to subtropical climate in the vicinity of the area during the deposition of the host rocks.Keywords
Gymnosperms, Arecaceae, Rosaceae, Eocene-Late Oligocene, Palaeoclimate.References
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