Question

Which one of the landforms is caused by the winds?
A) Sinkholes
B) Mushroom Rock
C) Lapies
D) Headland

Answer 1

Hint: A landform is a feature of the topography that is found on the Earth's surface. Mountains, hills, plateaus, and plains are the four main types of landform. Minor landforms include things like buttes, canyons and basins. Land can be eroded by water and wind, creating valleys and canyons. Both methods require an extremely long time to complete, potentially millions of years.

Complete answer:
A mushroom rock, also known as a rock pedestal or gour, is a common mushroom-shaped landform created by wind erosion. The material-carrying capacity of the wind is at its peak at a height of two to three feet (0.6 to 0.9 m) from the base, therefore abrasion (erosion by the wind in which transported materials hit an exposed rock surface and polish or scrape it) is likewise at its peak. Erosion occurs when harder rocks are stacked horizontally over weaker rocks in some circumstances.

Wind erosion of an isolated rocky outcrop develops at a different rate at its bottom than at its top, resulting in the formation of these rocks over thousands of years. They're mainly found in desert environments. The abrasion of wind-borne sand grains is most common within the first three feet (0.9 m) above the ground, causing outcrop bases to erode faster than their tops. A similar effect can be achieved using running water.

Therefore the correct answer is option ‘B’.

Note: Similar to the arrangement of boulders that produce a cascade, a mushroom rock may eventually grow from an initially flat patch of hard rock atop a soft rock. Weathering of the exposed hard rock layer exposes the below rock to erosion due to wind, water, salt intrusion, and other forces, depending on local conditions. The softer rock layer is more easily eroded, resulting in the formation of a blowout or depression.