GEOG 1202 Study Guide - Final Guide: Lava Dome, Divergent Boundary, Mid-Ocean Ridge
Document Summary
****plate tectonics****: expansion and contraction (preexisting theory to explain mountain ranges and earthquakes) Continental drift: theory that proposed that the present continents were originally connected as one or two large landmasses that have broken up and drifted apart over the last several hundred million years. Seafloor spreading: the pulling apart of lithospheric plates to permit the rise of deep- seated magma to earth"s surface in mid ocean ridges. Continental-oceanic: volcanoes and accretion- subduction- melting- mild metamorphism. Oceanic-oceanic: volcanoes island arc- deepest tranches in the world. Divergent: magma from the asthenosphere wells up in the opening between plates (moving apart) Transform: two plates slip past one another laterally. This slippage occurs along great vertical features called transform faults. San andreas fault: in cali, is on a transform boundary between the. Mid plate volcanic activity develops over narrow plumes of heated material rising through the mantle perhaps originating as deep as the core-mantel boundary.
