GEO 1401 Lecture 12: GEO Test 3
4 Apr 2016
School
Department
Course
Professor
Document Summary
Divergent oceanic oceanic produces: mid oceanic ridge. Magma luid located in the (mantle) asthenosphere. Olivine: liquid ions: 93 natural chemical elements. 8 very common: oxygen (o, silicon (si, calcium (ca, potassium (k, sodium (na, aluminum (al, magnesium (mg) Magma luid erupts from volcano and as the gases escape into the atmosphere it becomes lava. Consolidaion forms igneous extrusive rocks (very small silicates: volcanic glass (sio2) with no internal structure (obsidian or pumice) Types of explosions: quiet explosion basalic lava, pahoehoe: ropey texture, aa: ragged texture, fumaroles toxic gases (co2, so2, h2ov, explosive pyroclasic flow (volcanic glass, pyroclasic material ( ire fragments ) from smallest to largest. All volcanism in hawaii and emperor islands. Convergent oceanic coninental, convergent oceanic oceanic, coninental hotspots. Most violent and explosive: explosions= sound waves that create earthquakes, hot debris, ires, toxic gasses, landslides, and pyroclasic low. Form the ring of fire in the paciic ocean.
