Question

The tops of the block mountains are mostly _____________.
A. Steep
B. Conical
C. Flat
D. None of the above

Answer 1

Hint: Slow but giant motions of the earth's crust shape the mountains. The crust of the Earth consists of six immense slabs called plates that match together like a jigsaw puzzle. The soil will be forced uphill, forming mountains as two slabs of the earth's crust collide into each other. Owing to tremendous collisions between continents, many of the world's greatest mountain ranges have formed.

Complete answer:
When two tectonic plates shift away from each other, creating cracks on the surface of the Earth, Block Mountains are formed. The strip of land or the block of land between them can be lifted as simultaneous cracks or defects occur, resulting in the creation of block mountains. The upward block is referred to as a horst.
Block mountains, an example of extensional tectonics, frequently arise from rifting. This, such as the East African Rift zone, maybe small or form extensive rift valley networks. A smaller case is Death Valley in California. Two major types of block mountains exist; uplifted blocks between two faults and tilted blocks managed largely by one fault.
The upstanding portions of the earth between two faults or on either side of a rift valley are defined by Block mountains. Essentially, due to faulting in the ground surface, block mountains are formed. So, the top of the block is largely smooth.
The Sierra Nevada in California and Nevada, the Tetons in Wyoming, and the Harz Mountains in Germany are examples of block-mountains.
So, the correct answer is Option C.

Note: Since most stresses contribute to the tectonic action of shifting plates, most displacement between blocks is lateral, that is, through strike-slip faults, parallel to the Earth's surface. Nevertheless, vertical block movement yields even more drastic effects. Landforms are often produced where there is a significant vertical displacement in the faults. Strong escarpments may be created by adjoining raised blocks (horsts) and down-dropped blocks (grabens). Sometimes, due to compaction or stretching of the crust at that point, the displacement of these blocks is followed by tilting.