EARTHSC 1G03 Chapter Notes -Marine Reptile, Hydrothermal Vent, Basalt
10 Sep 2014
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Pangaea- wegener definition for the supercontinent that assembled at the end of the paleozoic era and then fragmented into separate continents into where they are found today. Continental drift- continents have moved and are still moving across the earth"s surface. Seafloor spreading- hess and dietz suggested that continents moved toward each other when old ocean floor between them sinks back down into earth"s interior, this process is now called subduction. Theory of plate tectonics- the theory that the lithosphere consists of separate plates that move with respect to one another. Glaciers are rivers or sheets of ice that flow across the land surface. As a glacier flows it carries sediments of grains of all sizes. Grains protruding from the base of the moving ice carves scratches called striations in the substrate. When the ice melts it leaves the sediment in deposit called till and buries striations.
