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This Concept Map, created with IHMC CmapTools, has information related to: unit plan--ginasacc, 1929--Arthur Holmes Mantle--thermal convection led to 1961-1962-- Harry Hess & Richard Dietz, Plate Tectonic Theory main features Convection Currents, fracture Zones where Earthquakes occur, Plate Tectonic Theory evidence Ocean floor youth "ocean floor mapping", Mantle upper mantle & Crust make up Crust, Plates there are 8 Indian, Plate Tectonic Theory 1950's Mid-Ocean Ridge Discovery, Permian 225 MYA spits into Laurasia, Mountains example teh Himalaya's, Plates there are 8 African, Indian meet at Australian, Rock materials located between crust, Convergent 3 types Cont/Cont, Mantle upper mantle & Crust make up lithosphere, Divergent can form under Sea, Plate Tectonic Theory main features Mantle--source of heat, Rock materials located between core, Plates there are 8 Australian, on Continent called Continental Rift, 1596--Abraham Ortelius Belief that Americas torn away from Africa by floods and earthquakes led to Use of bathymetric Surveys