Earth Sciences 1022A/B Lecture : Geology and Plate Tectonics
17 Jan 2012
School
Department
Course
Professor
Document Summary
Definition: geo = earth, ology = study of y earth approx. 4. 5 billion years y nebular hypothesis ~ 5 billion years ago: centripetal force, nebula (cloud) made of h and he contracted under gravity into the flat disc of our solar system (see text pg. for diagram, earth formed. pangea means all earth: fit of continents, good 900m below sea level, fossils match across oceans, rocks and structures also match across ocean basins, dated to be the same age, ancient climates. find glacial rocks where glaciers could not exist today: find coal fields in today s cold polar areas (only form in tropical areas)
