ATOC 185 Lecture Notes - Lecture 10: Mount St. Helens, Landslide, Richter Magnitude Scale
29 Nov 2017
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Document Summary
Major constituents include water, carbon dioxide, chl, so2 and hf. Volcano explosivity index (vei) is similar to richter scale for quakes. Hawaiian eruptions can produce lava but not as much ash. Strombolian eruptions produce bombs and lapilli and more ash. Vulcanian eruptions have an ash plume and only minor blocks. Pilnian eruptions have lots of ash, minimal lapili and blocks. ^ in ascending order of amounts of sio2. Cabada gas :active: volcanoes (black triangles) which post potential threat in bc. Another major hazard is ashfall from explosive eruptions of cascade volcanoes in washington state. Monterigian hills (royal, st hilaire, rougemont, brome, megantic, oka) Baited one by one and the age of each pluton is 125 mya - have all the same age meaning they developed during same tectonic phenomena. Based on previous activity high porbability that will erupt again before end of. Based on previous activity high porbability that will erupt again before end of the millenium.
