ENV234H1 Lecture Notes - Lecture 2: Uranium-238, Absolute Dating, Deuterium
Document Summary
Toronto rocks: covers almost everything in section 1 of course. Image was taken in 1969 (first moon landing: important date because before this time scientists did not look at the earth as one entity, at this time people recognized the earth was one entity, and as a system. Can divide earth into systems: atmosphere, hydrosphere, lithosphere (geology happens here, ecosphere. There are feedback mechanisms between systems: creates complex system as whole. Geological analysis: allows us to understand long-term evolution of climate/environment. Study of structure, processes, and chronology of earth. Can have very fast processes (volcanic eruptions: also very localized. Can have very slow processes (plate tectonics: less localized. Graph gives us idea of time scales and spatial scales. Env234h1 september 15th, 2015: short-term process (one day) Next animation shows plate tectonics: long term process. Takes millions of years: shows continents moving over time, plate tectonics changes the climate (changes organisms and oceans)
