GEOL 106 Study Guide - Final Guide: Monetary Policy Of The United States, Geothermal Energy, Supervolcano

• School: Queen's University
• Department: Geological Sciences and Geological Engineering
• Course: GEOL 106
• Professor: John Hages

Document Summary

The anatomy of stratovolcanoes: dangerous components (continued) Ash flow (pyroclastic flow, a mixture of pyroclastic material and gases). Nu e ardente (glowing cloud) is most common. When an eruption column collapses, pyroclastic material flows down the sides. The pyroclastic material is burning hot and is gas charged. The pyroclastic flow travels at 200 km/hr and can travel more than 10 km. Peeele, in 1902, killed 30,000 people (only 2 people survived)! Pyroclastic surge (lateral blast) tends to have lower temperatures. This is a lateral blast out of the side of the volcano. The pyroclastic surge travels at 300 km/hr and can travel more than 30 km. St. helens, in 1980, killed 69 people and destroyed many trees. Old ash on the flanks of the volcano, the new ash, and the melted snow mix. Shasta, ca, 300,000 years ago, where weed (a town) is built. Nevado del ruiz, in 1985; mudflow buried armero (a town), killing 20,000.