GEOLOGY

Detailed explanation-1: -A nuée ardente is a turbulent, fast moving cloud of hot gas and ash erupted from a volcano.

Detailed explanation-2: -Glowing clouds (nuées ardentes) are formed during pelean eruptions.

Detailed explanation-3: -A pyroclastic flow is a dense, fast-moving flow of solidified lava pieces, volcanic ash, and hot gases. It occurs as part of certain volcanic eruptions. A pyroclastic flow is extremely hot, burning anything in its path. It may move at speeds as high as 200 m/s.

Detailed explanation-4: -A dense fire cloud from a volcano is called a NUEE ARDENTE. One such eruption in 1902 killed 28, 000 people in the town of St. Pierre on the Caribbean island of Martinique. LAHAR-a mudflow created by a the heat of a volcanic eruption that melts ice trapped on the top of a volcano.

Detailed explanation-5: -Pyroclastic flows contain a high-density mix of hot lava blocks, pumice, ash and volcanic gas. They move at very high speed down volcanic slopes, typically following valleys.