March 17, 2008

March 17, 2008 - March 17, 2008 o Tectonics: disruption of...

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March 17, 2008 o Tectonics: disruption of a planet’s surface by internal stresses o Convection of the mantle creates stresses in the crust called tectonic forces o Can be global or just local o Plate tectonics may be unique to earth o Rocks act like silly putty o Behavior depends on the time scales of the stresses Long time scales => flows Short time scales => breaks o Also depends on temperature High temp => rock flows easily Low temp => rock more brittle, breaks and cracks o Erosion o Erosion is the wearing down or building up of geological features by wind, water, ice and other phenomena of planetary weather Weather is key to erosion Without weather there would be no movement of wind water and ice Colorado river continues to carve Grand Canyon Glaciers carved the Yosemite valley o Connecting erosion to formation properties Erosion requires an atmosphere What kinds of planets create and atmosphere? o
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This note was uploaded on 04/07/2008 for the course ASTR 1110 taught by Professor Hornstein during the Spring '08 term at Colorado.

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March 17, 2008 - March 17, 2008 o Tectonics: disruption of...

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