GEOSC 020 Study Guide - Midterm Guide: Plate Tectonics, Continental Crust, Oceanic Crust
Document Summary
Geology definition: factors such as climate and the availability of water, that are critical to ecosystems. Where the rocks creating these natural resources deposit themselves, or where magma invaded. Age of rocks and how they formed. Oceanic: average composition that is the same as basalt (dark lava)(4 mi) Core: outer core is molten while the inner core is solid. Thickness of crust: regions that have high elevation generally have thick crust. Isostasy: relationship between crustal thickness and elevation. The thicker the block, the higher the block. Relative age of rock layers (youngest to oldest, top to bottom) Shape and sharpness of rocks and pebbles. Plates: large, continent sized slabs that break up the lithosphere. Alfred wegener"s theory of continental drift: pangaea. Evidence: trans atlantic connection(coal deposits and mountain ranges matching up), rock ages/geologic history, and fossils. 3. 4 how do plates move relative to one another: divergent: two plates move apart relative to one another.
