GEOL 1001 : Review 1
Document Summary
Schiebout: ancient climate (geochemists: bao, the main difference between earth science and the rest of the sciences (except for astrophysics) is the use of deep time . For us a million years passes like a 15-minute break: geological processes can take place more slowly than people can notice. Mantle, inner core interact: e. g. volcanic degassing creates warm periods in earth"s history, the oceans buffer greenhouse gases, the core"s magnetic field allows migration of fish and birds. Key concepts: continental drift, seafloor spreading, convergent plate boundary, divergent plate boundary, transform-fault plate boundary, why do plates move, magnetic anomalies, pangaea. Lecture outline: plate tectonics, the unifying theory of the earth sciences, the outer portion of the earth is made up of about 20 distinct. Magnetic data: the seafloor as a magnetic tape recorder. During and after wwii, it was noticed that the magnetic field near the ocean floor exhibited significant variation.
