GEOSCI 100 Lecture Notes - Lecture 16: Supercontinent, Plate Tectonics, Orogeny

• School: UW-Madison
• Department: Geoscience
• Course: GEOSCI 100
• Professor: Meyers, Stephen R

Document Summary

-midterm next thursday (3/22) is all multiple choice-- *stratigraphic diagram - way of summarizing rock history at a particular location - 3 related concepts : geologic time, the rock column at a particular location, mahir rock units shows. The cyclical opening and closing of ocean basins caused by movement of the earth"s plates begins with a rising plume of magma and the thinning of the overlying crust. A trip through a plate tectonic cycle aka the wilson cycle . -for something to sink it has to be denser. -it"s really hot in the center (spreading ridge) and then it cools toward the outer edges which makes it more dense so eventually it sinks or subducts . *accretion = the basic process = the gradual accumulation of additional layers or matter. Lecture slideshow slide #39: accretion along a transform fault, accretion of an island arc to a continent, accretion of a buoyant fragment to a continent.