OCS 1005 Chapter : Plate Tectonics Part 1
15 Mar 2019
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Document Summary
Chapter overview: early theory continental drift, subsequent theory - plate tectonics, 3 main classifications of plate boundaries, intraplate land forms, satellite imagery confirms that tectonic plates continue to move today. Plate tectonics: #1 density and layering in fluids, #2 isostasy, #3 convection and convection cells, #10 modeling, first proposed by alfred. Wegener, a german meteorologist, in 1912: called it continental. Drift : noted puzzle-like fit of modern continents, originally suggested by. 1960"s that matched the 2000-m depth contour, which is mid-way between the coast and deep sea, and achieved a good fit. Evidence for continental drift: geologists compared rocks along edges of continents to corresponding locations on other land masses. In some areas the matching rocks are overlain with younger rock or eroded away, but supporting evidence still existed: they also examined mountain chain continuity. Evidence for continental drift: age of glacial deposits is. 250 ma, are located only in eastern south. Continental rock can not move through ocean rock.
