February 19th - - Yellowstone is actually a giant volcano.-...

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February 19 th Stick Slip=  The fault remains stuck for centuries before it ruptures and moves at once. Creep Fault=  This fault slowly moves. Items built on it will eventually offset. * Examples: University of Santa Barbara, many streets in California. - There are 7 major faults running through California. * The Hayward fault is the most dangerous. 1)  Hot Spots - Long lasting magma sources that develop beneath the lithosphere - Important:  These may provide fixed reference points - There are many hot spots; dozens: * There are many different degrees of activity * Accordingly, there are many different numbers of estimations - On moving oceanic plates volcanic islands will form and then move off of the hotspot.  Next they will sink due to Isostacy. - Hawaii was formed underneath OCTL.
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Unformatted text preview: - Yellowstone is actually a giant volcano.- The Galapagos Islands are owned by Ecuador.- Iceland is directly on top of a mid ocean ridge. 2) Initiation of a Plate Boundary- Divergent boundary initiates where a plate splits: RIFTING- This can occur in the middle of CCTL.- Initiated by: * Hot spots * Upwelling of hot mantle * Excessively large continents * Impacts perhaps?- There are some examples on Earth of all 4 steps: * Unparched continental crust; stretched, possibly some volcanism ~ Colorado Plateau * Rifting continues, faulting thins the crust, basaltic volcanism ~ Rio Grande Rift * First oceanic crust; ocean invades ~ Red Sea * Spreading center well defined, ocean basin widens ~ Atlantic Ocean...
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This note was uploaded on 04/30/2008 for the course GEOL 120 taught by Professor Maglouihlin during the Spring '08 term at Colorado State.

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February 19th - - Yellowstone is actually a giant volcano.-...

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