Question

A valley formed by sinking of ground between two almost parallel faults iscalled

Answer 1

Answer:Fault, in geology, a planar or gently curved fracture in the rocks of the Earth’s crust, where compressional or tensional forces cause relative displacement of the rocks on the opposite sides of the fracture. Faults range in length from a few centimetres to many hundreds of kilometres, and displacement likewise may range from less than a centimetre to several hundred kilometres along the fracture surface (the fault plane).

Explanation:

Answer 2

Valley formed by sinking of ground between two almost parallel faults is rift valley.

Explanation:

• Rift valley is a lowland depression which is caused when the tectonic plates of the Earth move apart i.e in case of a geographical fault.

• When the 'hanging wall' drops down and the resulting force is creating extension it is called a normal fault.

• But when the force is creating compression and the 'hanging wall moves up it is called a reverse fault'.

• And in situations when the hanging wall doesn’t move upwards or downwards, it just moves sideways it is called trans current fault.

• All such faults result in a section of the Earth’s crust being lowered or elevated which is called horst and graben respectively.

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