A9R18EC.tmp 5 - Continental drift b History (Wegener,1912,...

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Prof. M. Fall - University of Ottawa 5 The The ocean ocean crust crust (in black color in the figure) is thin (7 km in average). It is mainly made from basalt and gabbro rocks. This crust is relatively young, since it is continually created by the plate tectonic. Basalts (pillows-lava) OCEAN CRUST Source: Université Lil e 2.2 Structure de la Terre (8) Crust Upper mantle (lithospheric) Upper mantle (asthenopheric) 2.2…. Dynamic of the Earth (1) 2. The Earth Which movements drive the Earth? The Earth What is it inside the Earth? Which movements drive it? The Earth’s crust is not static. The Earth’s crust is moving due to the plate tectonics 2.2…. Dynamic of the Earth (2) 2. The Earth Which movements drive the Earth’s crust?
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Unformatted text preview: Continental drift b History (Wegener,1912, 1915) 2. The Earth 2.2…. Dynamic of the Earth (3) 2. The Earth 2.2…. Dynamic of the Earth (4) Continental drift: History (Wegener,1912, 1915) Alfred Wegener was the first who proposed that the continents once existed as a vast supercontinent, Pangea, that later fragmented Wegener — Continental Drift Source : Essentials of Geology by Declan DePaor Continental drift b History (Wegener,1912, 1915) b The supporting arguments b Climatic Climatic conditions conditions b Geological Geological b Paleontologic b Geographic (puzzle). .. (puzzle). .. 2. The Earth 2.2…. Dynamic of the Earth (3)...
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This note was uploaded on 03/21/2011 for the course GNG 4124 taught by Professor Soils during the Spring '11 term at Uni. of Nottingham Ningbo.

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