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Welcome To Class

Welcome To Class. www.kendricknovak.wikispaces.com. Agenda. Turn in homework Geologic time scale Notes Fossil Reading 2 Review for test. Geologic Time. If time was a 30 day month Recorded human history would be .18 minutes or 10.8 seconds

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Welcome To Class

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  1. Welcome To Class www.kendricknovak.wikispaces.com

  2. Agenda • Turn in homework • Geologic time scale • Notes • Fossil Reading 2 • Review for test

  3. Geologic Time • If time was a 30 day month • Recorded human history would be .18 minutes or 10.8 seconds • First Homo sapiens would be .013 days or 18.72 minutes or 1123.2 seconds • Cenozoic would be .42 days or 604 minutes • Mesozoic would be 1.18 days or 1700 minutes • Paleozoic would be 1.95 days or 2808 minutes • Precambrian would 26.4 days or 38106 minutes http://www.athro.com/geo/hgfr1.html

  4. In a day… • Human history = 2.5 seconds • Home sapiens = .6 minutes • Cenozoic = 20.2 minutes • Mesozoic= 56.5 minutes • Paleozoic= 93.6 minutes • Precambrian= 1269.7 minutes

  5. Geologic Time Scale • Geologic time scale – chart that divides Earth’s history into units of time • Divisions based on geologic events and major changes in living things

  6. Geologic Time Scale Divided into eons, eras, and periods

  7. PRECAMBRIAN TIME Length– beginning of time (4.6 billion yrs) – 542 million years ago Makes up 88% of Earth’s history

  8. Precambrian Time • Major Events • Earth forms • Rocks and minerals form • Stromatolites (algae) are most common fossils

  9. PALEOZOIC ERA

  10. Paleozoic Era • Length – 542 – 251 million years ago • Major Events • Supercontinent, Pangea, formed • Shelled marine animals common • Land Plants and animals appear • Fish, amphibians, reptiles appear • Permian mass extinction

  11. Paleozoic Broken Down • Cambrian • Ordovician • Silurian • Devonian • Carboniferous • Mississippian • Pennsylvanian • Permian

  12. MESOZOIC ERA

  13. Mesozoic Era • Length – 251-65 million years ago • Age of the Dinosaurs • Major Events • Pangea broke up • Dinosaurs • First Birds • First flowers • Dinosaur extinction

  14. Mesozoic Broken Down • Periods in the Mesozoic • Triassic • Jurassic • Cretaceous

  15. CENOZOIC ERA

  16. Cenozoic Era • Length – 65 million years ago-present • Age of mammals • Major Events • Mammals appear • Continents in current places • First humans

  17. Cenozoic Broken Down • Tertiary • Paleocene • Eocene • Oligocene • Miocene • Piliocene • Quaternary • Pleistocene • Holocene

  18. Fossil Reading • Due today

  19. Review • Worksheet due on test day • Create a Note card (tomorrow)

  20. Which are the oldest? • Remember the laws/principles/unconformities • Law of Superposition • Principle of Original Horizontality • 3 Unconformities • Law of Cross Cutting Relationships

  21. Absolute Age • Radiometric/carbon dating • Half life

  22. Interpret a half life graph 5.8 days

  23. .25 half lives

  24. 28 years

  25. Review • Work on the worksheet • Due on the TEST!! • Create a note card www.kendricknovak.wikispaces.com

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