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Prizomwala, S. P.
- Distribution of Indus born Mica along Gulf of Kachchh Coast: Implications in Understanding Current Dynamics
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Authors
Affiliations
1 Department of Geology, M.S. University of Baroda, Vadodara - 390 002, IN
1 Department of Geology, M.S. University of Baroda, Vadodara - 390 002, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 79, No 6 (2012), Pagination: 557-562Abstract
Indus is one of the major sources of sediments to the Gulf of Kachchh. Yet only its <63 micron fraction is studied in detail with regards to the offshore current dynamics. Hence here we present our study on characteristic signature of the Indus sediment load (i.e. mica minerals) in >63 micron size fraction along the coast of Gulf of Kachchh. The spatial distribution of mica minerals along the Gulf of Kachchh coast was studied which showed in general decreasing trend as we move along the northern and southern coast of the Gulf of Kachchh but, an increase in amount near the southern mouth at Okha. The study shows that the earlier proposed tidal barrier is ineffective in restricting movement of mica across the mouth of the gulf due to its characteristic transport mechanism. Also the presence of mudflats along the gulf of Kachchh coast plays a vital role as sediment receptors in the active sediment transport processes and mica minerals prove to be a promising simple tracer in studying the Indus born sediments in the region.Keywords
Mica Minerals, Sediment Pathways, River Indus, Gulf of Kachchh.
References
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- Late Pleistocene Relative Sea-Level Changes from Saurashtra, West Coast of India
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Authors
Affiliations
1 Active Tectonics Group, Institute of Seismological Research, Gandhinagar 382 009, KP
2 Department of Geology, The M.S. University of Baroda, Vadodara 390 002, KP
3 Department of Geology, Kangwon National University, Kangwon 24341, KP
1 Active Tectonics Group, Institute of Seismological Research, Gandhinagar 382 009, KP
2 Department of Geology, The M.S. University of Baroda, Vadodara 390 002, KP
3 Department of Geology, Kangwon National University, Kangwon 24341, KP
Source
Current Science, Vol 115, No 12 (2018), Pagination: 2297-2301Abstract
The fluvial systems of Saurashtra, Gujarat, India have archived signatures of sea-level stands for the Late Quaternary Period. Based on geomorphology, sedimentology and optical dating, the lower reaches of Noli river in southwestern Saurashtra reveal the presence of marine, fluvially reworked and aeolian forms of miliolite. Optical chronology permits us to extend the age range of fluvially reworked miliolites from 75 (as previously believed) to 114 ka. The fluvial sequence of southwestern Saurashtra has responded to sea-level changes through meandering. Presence of aeolian miliolites dated to 23 ka suggests regional aridity during the time of their deposition and preservation. Marine notches in Diu mark Middle Holocene high sea-level stand and their preservation implies active tectonism in the region.Keywords
Fluvial Response, Optical Dating, Miliolites, Sea-Level Change.Full Text
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