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Topic: Geological History of NY State Take out ESRT pages 8 & 9

Topic: Geological History of NY State Take out ESRT pages 8 & 9. Take out you ESRT open to pages 8 & 9. Geological History of New York State. Division of Geological Time. Largest Unit. Smallest Unit. Eon: an indefinitely long period of time. Precambrian 4600 Ma to 570 Ma. Phanerozoic

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Topic: Geological History of NY State Take out ESRT pages 8 & 9

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  1. Topic: Geological History of NY StateTake out ESRT pages 8 & 9

  2. Take out you ESRT open to pages 8 & 9 Geological History of New York State

  3. Division of Geological Time Largest Unit Smallest Unit

  4. Eon: an indefinitely long period of time. Precambrian 4600 Ma to 570 Ma Phanerozoic 570 Ma to present Ma means million of years ago

  5. ERAS are broken down to Time Periods.

  6. The Phanerozoic Eon is divided into time segments called ERAS. Mesozoic 245 Ma to 66.4 Ma Cenozoic 65 Ma to present Paleozoic 570 Ma to 245 Ma

  7. Time Periods are broken down into Epochs.

  8. Important Geological Events in NYS Rock Record in NYS Time Distribution of Fossils Positions of Earth’s landmasses Life on Earth

  9. Different periods in the ESRT

  10. Precambrian Eon • 85% of Earth’s history • intense volcanic activity; oceans form; meteorite bombardment • atmosphere develops from primitive through out-gases from volcanoes to one with free oxygen (and ozone layer) • life begins with unicellular organisms (blue-green algae and bacteria) and evolves to multi-cell organisms like worms • few fossils exist because most did not have hard parts

  11. Precambrian Events listed on ESRT Oldest Events

  12. Cenozoic 65 Ma to present Why do we know more about the phanerozoic than the Precambrian, if the Precambrian was a larger span of time? Mesozoic 245 Ma to 65 Ma Paleozoic 570 Ma to 245 Ma

  13. Paleozoic Era = Ancient Life Cambrian Period

  14. Mesozoic Era = Middle Life

  15. Cenozoic Period = Recent Life Age of the Mammals

  16. Time Distribution of Fossils

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