GEOL105 Study Guide - Midterm Guide: Oceanic Crust, Divergent Boundary, Continental Drift

• School: University of Delaware
• Department: Geology
• Course: GEOL105
• Professor: Kohut Edward

Document Summary

Disaster: hazardous event over a limited time/ area. Catastrophe: my life: jk: massive disaster that costs 303793037930379$ Risk: probability of it happening x the consequences. Earth materials + energy = process > change: when ppl get inolved, you get a catastrophe. Magnitude frequency relation: inverted: the largest events are the most infrequent. It is rare for a volcano to explode and kill 28,000 ppl often. Most common elements in crust: oxygen, silicon, calcium, aluminum, iron, magnesium. Minerals: natural, solid compound w. speci c composition and crystal shape: silicates: formed by weathering of other silicates in groups of small particles. Weak - > good for erosion ex: quarts: carbonate: co2 that would be in atmosphere ex. Rocks: aggregate ( solid mix) of minerals. Compositional layers: metallic core > iron, nickel, solid, rocky mantle > silicon, magnesium, iron > 70% of earth, thin crust > continental and oceanic. Oceanic: less dense than mantle, some of mantle, 5-10 km thick.