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Which of the following states is also known as the тАШMolassis basinтАЩ, which is made up of soft unconsolidated deposits?
Assam
Meghalaya
Tripura
Mizoram
Mizoram
Mizoram is geologically known as the 'Molassis Basin' because it consists of soft, unconsolidated deposits formed by marine sediments. This region in Northeast India is characterized by a unique topography of synclinal valleys and anticlinal ridges.
Mizoram is geologically known as the 'Molassis Basin' because it consists of soft, unconsolidated deposits formed by marine sediments. This region in Northeast India is characterized by a unique topography of synclinal valleys and anticlinal ridges.
Geological History of Northeast India: Part of the Tertiary sedimentary belt formed during the Himalayan orogeny, primarily consisting of the Surma and Tipam groups of rocks.
Mizoram is geologically part of the Indo-Burma range.
The term 'Molassis' refers to sedimentary deposits that accumulate in a basin at the front of a mountain chain.
The region is prone to high seismic activity due to its soft soil composition.
The sedimentary rocks in Mizoram are primarily of the Tertiary period (roughly 2.6 to 66 million years old).
Assam is primarily known for its alluvial plains and the Brahmaputra valley system.
Tripura's landscape is also hilly, but Mizoram represents the most prominent example of this specific basin type in the context of the Himalayan geological evolution.
Option B (Meghalaya) is a plateau composed primarily of ancient Archaean rocks and basaltic traps, distinct from the Tertiary sedimentary Molassis basin.
D is correct тАФ Mizoram is known as the Molassis Basin due to its soft, unconsolidated, and geologically young sedimentary deposits.
Link this concept to the study of the 'Himalayan Orogeny'тАФthe same geological forces that created the Himalayas also created the depositional basins in the Northeast.
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