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Today Pre Cambrian Geology DUE: Coastal Geology Project Monday Paleozoic Tectonics

Today Pre Cambrian Geology DUE: Coastal Geology Project Monday Paleozoic Tectonics LAB Geology of North America DUE: Choice of Fossil for Fossil Poster Next Wednesday Paleozoic Climate & Life Mesozoic Tectonics. Outline of Pre-Cambrian Time. Age & Origin of Earth

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Today Pre Cambrian Geology DUE: Coastal Geology Project Monday Paleozoic Tectonics

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  1. Today • Pre Cambrian Geology • DUE: Coastal Geology Project • Monday • Paleozoic Tectonics • LAB Geology of North America • DUE: Choice of Fossil for Fossil Poster • Next Wednesday • Paleozoic Climate & Life • Mesozoic Tectonics

  2. Outline of Pre-CambrianTime

  3. Age & Origin of Earth • Oldest Rocks & Minerals • Archean Tectonics • Origin of Atmosphere & Life

  4. The Oldest Terrestrial Rocks: Acasta Gneiss4.0 billion years old! Source:Sam Bowring/MIT

  5. The Oldest Rocks on Earth : Meteorites4.5 billion years old! Source: http://www-curator.jsc.nasa.gov/outreach1/expmetmys/slideset/Slides16-20.htm http://pds.jpl.nasa.gov/planets/captions/smallbod/iron.htm

  6. 01_13and15.jpg

  7. Zoomable Art PC Mac 01_Featured_Art.jpg

  8. 23_03.jpg

  9. Hadean: Hell on Earth? (Fig. 13-4)

  10. Oldest Rocks & Minerals

  11. Archean Crust

  12. World’s Oldest Rock: Acasta Gneiss 4.0 b.y. (Fig. 12-25)

  13. Source: http://www.gly.fsu.edu/~salters/GLY1000/13Age_of_Earth/Slide19.jpg

  14. World’s Oldest Mineral Grain: Zircon form Jack Hills Australia Source: http://www.geology.wisc.edu/zircon/Earliest%20Piece/Earliest.html

  15. Australian Craton Source: http://earthobservatory.nasa.gov/Study/Zircon/

  16. Jack Hills Metaconglomerate Source: http://www.geology.wisc.edu/zircon/Earliest%20Piece/Earliest.html

  17. World’s Oldest Sedimentary Rock: Isua Metasediments 3.8 b.y. Source: http://news.bbc.co.uk/2/hi/science/nature/3321819.stm

  18. Source: http://www.geology.wisc.edu/zircon/Earliest%20Piece/Earliest.html

  19. Archean Tectonics

  20. Why so little Archean Crust?

  21. Granulite/gneiss and greenstone belts

  22. Granulite Greenstone Belts

  23. Archean Pillow Basalts

  24. Formation of greenstone beltsArc Model

  25. Formation of greenstone beltsArc Model (Fig. 13-5)

  26. Pre-Cambrian of North America

  27. 13_06.jpg

  28. For Monday 5/17 • On-line Readings • Early and Late Paleozoic Events

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