GEOL 1120 Lecture Notes - Lecture 20: Juan De Fuca Plate, Plate Tectonics, Appalachian Mountains
2 Dec 2018
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Document Summary
Where two continental plates converge, the plates crumple and thicken, forming large mountain belts. The appalachians formed in a continent-continent collision ~300 myr ago. Which mountain belts is a result of continent-continent collision. Some microplates are the last remnants of plates that have almost entirely subducted (e. g. juan de fuca plate) At transform plate boundaries, plates slide past one another laterally. Transform faults transform motion from one fault to another. How fast are the plates moving (~2-20 cm/yr) The net global plate motion must sum to zero. If the sum of the plate movement vectors were not equal to 0, then. Earth would either get bigger or smaller. The plates move because the mantle moves, and the mantle moves because heat makes it convect. In the future, is the wilson cycle likely to slow down. Shield volcanoes are much bigger than stratovolcanoes, which are much bigger than cinder cones.
