ENGLISH LITERATURE (CBSE/UGC NET)

Detailed explanation-1: -Pyroclastic flows can generate lahars when extremely hot, flowing rock debris erodes, mixes with, and melts snow and ice as it travel rapidly down steep slopes. Lahars can also be formed when high-volume or long-duration rainfall occurs during or after an eruption.

Detailed explanation-2: -One cause of a volcano lahar is an eruption, when volcanic ash mixes with a volcano glacier, creating a muddy mixture. It is also possible for a lahar to form when a lake or dam breaks, mixing water with ash already on the side of a volcano.

Detailed explanation-3: -Lahars. Lahars, also known as volcanic mudflows, are hot or cold mixtures of water, rock, sand, and mud moving down the flanks of a volcano and running away from it. Lahars look like fast-moving masses of wet concrete that carry tephra ranging in size from a few millimeters to more than 10 m in diameter.

Detailed explanation-4: -A flow of volcanic mud formed by the mixing of water with Volcanic Ash, often taking the destructive power of an avalanche is known as Lahar. The water may be supplied by seasonal rainfall or by the overflow from a Crater-Lake.

Detailed explanation-5: -When volcanic ash mixes with sufficient water it can be eroded, transported and later deposited downslope. When moving, it can look like a mass of wet concrete. Such flows are known as secondary lahars, which can vary in size and speed. These flows can deposit ash and other debris over large areas requiring clean up.