Question

In which of the following district Lacustrine deposits are found?
1. Nandurbar
2. Kolhapur
3. Nagpur
4. Ratnagiri

Answer 1

Correct Answer - Option 3 : Nagpur

The Correct answer is Nagpur.

• Lacustrine deposits are sedimentary rock formations that formed at the bottom of ancient lakes. 
• A common characteristic of lacustrine deposits is that a river or stream channel has carried sediment into the basin.
• Lacustrine deposits form in all lake types including rift graben lakes, oxbow lakes, glacial lakes, and crater lakes.
• Lacustrine environments, like seas, are large bodies of water.
• They share similar sedimentary deposits which are mainly composed of low-energy particle sizes.
• Lacustrine deposits are typically very well sorted with highly laminated beds of silts, clays, and occasionally carbonates. In regards to geologic time, lakes are temporary and once they no longer receive water, they dry up and leave a formation.
• Such lacustrine deposits are formed in Nagpur and the Surrounding area in Maharashtra.
• Lacustrine deposits can form in every variety of basins found in nature.
• Rift graben lakes are formed from crustal stretching also known as rifting.
• Sediment influx is typically dominated by precipitation runoff and discharge through channels migrating towards the depression.
• Oxbow lakes form lacustrine deposits from seasonal overbank flooding as well as precipitation runoff which refills these isolated basins with fresh water and new sediments.
• Glacial lakes form when terminal moraines block water from escaping the newly carved valley from glacial erosion. As the glacier melts, the valley fills with meltwater that creates a glacial lake.
• Crater lakes can be meteoritic or of the caldera variety. Crater lakes sediments are provided from precipitation runoff descending their steep slopes.