Which Indian state is made up of soft unconsolidated river deposits and is also known as 'molasses basin'?

Correct option is A

The correct answer is (a) Mizoram.

Explanation:

1. Molasses Basin: The term "molasses basin" refers to a region formed by the deposition of soft, unconsolidated river sediments over time, usually in a synclinal basin.
2. Mizoram's Geology: Mizoram is known for its unique geological structure and is part of the Surma Basin, which is primarily composed of soft, unconsolidated river deposits, making it resemble a molasses basin.
3. Location and Features:
• Mizoram lies in the northeastern region of India and is part of the hilly terrains of the Purvanchal range.
• It is characterized by folded sedimentary formations and river deposits, which are key features of molasses basins.

Key Points:

• Geological Composition: The region consists of rocks formed by river deposits such as sandstone, shale, and siltstone.
• Surma Valley Basin: Mizoram is part of the Surma Valley structural basin, formed during the Tertiary period.
• Landforms: The soft sedimentary deposits make the land susceptible to erosion, landslides, and other geological activities.