Final answer:
A pyroclastic flow, also known as a nuee ardente, is a dense cloud of volcanic ash and gas that flows rapidly down a volcanic slope. It is characterized by its high temperature, speed, and destructive power.
Step-by-step explanation:
A pyroclastic flow, also known as a nuee ardente, is a dense cloud of volcanic ash and gas that flows rapidly down a volcanic slope. It is characterized by its high temperature, speed, and destructive power.
During a volcanic eruption, the intense heat causes rocks and magma to be ejected into the air. This mixture of hot volcanic material, gas, and ash forms a pyroclastic flow that moves downhill due to gravity. Pyroclastic flows can reach speeds of over 100 kilometers per hour and temperatures exceeding 800 degrees Celsius.
These flows can cause devastation to anything in their path, including structures, vegetation, and wildlife. The density and heat of the flow can lead to the incineration or suffocation of living organisms.