January 24th - January 24th Geologically Fast Processes(100 years or less Volcanic Eruptions Earthquakes faults(Discontinuity or breaks in Earth`s

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January 24 th Geologically Fast Processes (100 years or less) - Volcanic Eruptions - Earthquakes, faults (Discontinuity or breaks in Earth’s crust) - Landslides, avalanches - Tsunamis (‘Tidal waves’) -Meteorite Impacts - Floods, Mudflows What is geology? - Physical geology: materials and processes - Historical geology: physical and biological history Geological Time - Think in terms of geologic time… vast quantities; ‘deep time.’ * We see a snapshot of the evolution of Earth * The Earth changes every day, but just so slowly we are unaware. Phanerozoic (Visible Life) Divisions: Cenozoic (0 -65 Ma):  ‘Recent life’ - Mammals dominant, excellent record, K-T boundary marks beginning Mesozoic (65-245 Ma):  ‘Middle life’ - Dinosaurs Paleozoic (245-570 Ma):  ‘Early life’ - First well-preserved fossils at beginning of Paleozoic; invertebrates dominant. - Divisions established based on sedimentary rocks and fossils (stratigraphy). - Divisions (but not absolute ages) developed beginning approximately 150 years ago.
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This note was uploaded on 04/30/2008 for the course GEOL 120 taught by Professor Maglouihlin during the Spring '08 term at Colorado State.

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January 24th - January 24th Geologically Fast Processes(100 years or less Volcanic Eruptions Earthquakes faults(Discontinuity or breaks in Earth`s

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