GEOL 11040 Lecture Notes - Lecture 13: Columbia River Gorge, Volcanic Explosivity Index, Common Application
23 Oct 2018
School
Department
Course
Professor
GEOL 11040 verified notes
13/31View all
Document Summary
10 vei 4 (>0. 1 km^3) eruptions in last 10 years. 10 vei 5 (> 1 km^3) eruptions in the last 130 years. 10 vei 6 (> 10 km^3) eruptions in the last ~500 years. > vei 6 eruptions definitely witnessed by people: Only 1, mt tambora - june 1815 eruption largest in recorded history. 160 km^3 of material thrown into atmosphere during this eruption. Crater lake formed by vei 7 eruption ~7,500 years ago. Yellowstone national park is mostly comprised of a giant caldera about 30 km wide by 45 km long, formed in a vei 8 eruption. Ash bed from this eruption can be found over much of continental usa. Columbia river gorge, washington: many basaltic lava flows, most. 15-16 million years old, stacked on top of each other. Large igneous provinces are suspects in many of the mass extinction events in earth"s history. Presently erupting or at least showing signs of seismic and thermal activity.
