The Rock Cycle - Geosc 10 Thursday March 4th 1999...

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Geosc 10 Thursday, March 4th, 1999 Announcements: There was a 5 pt. attendance quiz given in today's lecture. Lecture notes: I. Preview A. "Surface Processes" (same as notes on Tuesday's lecture) B. Deposition --transfer of seidmentary materials through moving water into a stable area II. "The Rock Cycle" III. Terms A. Uniformitarionism --uniform, slow processes that occur everyday; rivers carrying sediments; plate tectonism is uniformitarion B. Catastrophism --every once in awhile there is a huge earthquake, volcano, etc. that causes a huge change in geography and topography; in the later part of the 18th century, this was the principle way of thinking C. Mass wasting -- Gros Ventre landslide (Grand Tetons, NW Wyoming) 1. Gros Ventre (summary of events) a. River eroded the stable toe (river event)
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b. Major landslide/debris flow (land event) c. Debris dammed river, formed lake (river event) d. Debris dam eroded after 2 years (land event) e. Down--river flooding destroyed town (river event) 2. Debris flow was triggered by wet conditions over the entire season
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