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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gurmeet Singh posted an Question
January 08, 2021 • 19:39 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
9. when sea level rise, the sea invades a river valley, producing a nearshore body of water with mixed and variability salinity is termed as a. an atoll b. a la
9. When sea level rise, the sea invades a river valley, producing a nearshore body of water with mixed and variability salinity is termed as A. An atoll B. A lagoon D. A jetty (ISM-2016) C. An estuary 140. A matrix supported conglomerate with planar, non-erosional base and clast imbrication 1s interpreted as a product of: A. Channel lag deposition B. Debris flow deposition C. Glacial outwash deposition D. Residual lag deposition (ISM-2016)
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Saurabh 1 Best Answer
1) It has to be estuary for sure. As estuary is found where the freshwater or the water with least or minimal salinity is mixed with the seawater of varied amount of salinity (depending on the various factors like density and temperature). This mixing leads to brackish conditions and is home to varied biology. 2) In case of channel lag like fluvial deposits, the conglomerate is clast supported mainly but when it comes to debris flow, deposits are unstratified and poorly sorted composed of loose fragments like mud, sand or even some larger fragments in their vicinity that have preferred orientation.