Geology GEOL-G 130 Lecture Notes - Lecture 2: West Antarctic Ice Sheet, Plate Tectonics, Mid-Atlantic Ridge
Document Summary
Earthquakes and volcanoes are not distributed evenly and occur at plate boundaries. Earthquakes with volcanoes occur with mountains above sea level and below. Mid atlantic ridge is an underwater mountain range. Continents plus oceans on a single plate. Plate boundaries: plates can move away from each other (mid-atlantic) Divergent plate boundary: plates can converge and run into each other (collide) Convergent plate boundary: have different rock types so they can tell us about past plate boundaries if we know the age, atlantic is growing 1 /year. Can grow with new crust, new rock. Circulation where something hot rises as it moves away from the heat source and then it cools, sinks back, down, and makes a big loop. A way to transport heat: density=mass/volume. Bowling ball, mass is greater, greater density. Will rise away from the heat sources. Basalt contains more heavy minerals: density is controlled by.
