In deserts rocks have the shape of a mushroom. Why?
Answers
Explanation:
(i)Some rocks have a shape of a mushroom because winds erode the lower section of the rock more than the upper pa. rt. Therefore, such rocks have narrower base and wider top
(ii)Floodplains are very fertile because floods deposit layers of fine soil and other material.
Answer:
Mushroom rocks are a type of landform in desert areas. It is initially a normal piece of sedimentary rock. As wind blows through the rock, the larger particles in the sand will be blown at the lower area and lighter particles in the sand will be at top.
A mushroom rock, also called rock pedestal, or a pedestal rock, is a naturally occurring rock whose shape, as its name implies, resembles a mushroom. The rocks are deformed in a number of different ways: by erosion and weathering, glacial action, or from a sudden disturbance. Mushroom rocks are related to, but different from, yardang.[1]
A mushroom rock, rock pedestal, or gour is a typical mushroom-shaped landform that is formed by the action of wind erosion. At an average height of two to three feet (0.6 to 0.9 m) from the base, the material-carrying capacity of the wind is at its maximum, so abrasion (erosion by wind in which transported materials hit an exposed rock surface and polish it or scratch it) is also maximized. In some cases, harder rocks are arranged horizontally over a softer rock, resulting in such erosion.