GEOS 212 Lecture 30: GEOS 212
27 Apr 2016
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Homework box in gs building (turn them in before friday at 12) Surface area 70% ocean and 30% land (99% livable space in oceans?) Oceans are mostly deep, except shelf (coasts-parts of continent) Drill down to core to explode nuclear device. Encounter giant diamonds & tectonic plates in mantle. Lisophere= rigid = crust + upper mantle (100km) Contienetal crust = granite (lo density, 30km thick) Origin of most water in the oceans and most gases in the atmosphere! Ocean volcanoes carried by plate to make hawaii. 13,679 ft. elevation, 33,476 ft. above ocean floor! The key to the future is the past. Pyroclastic flow made up of hot rock, ash, magma. > source of most water & atmosphere on earth! Next possible huge earthquake in la in 2017. Next possible huge earthquake in bay area in 2026. Water covers part of floodplain every ~ 10 years. Covers all of floodplain every ~ 100 years.
