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Chunky Geologic History

Chunky Geologic History. W hat is happening now happened in the past. You need your ESRT. What is the oldest layer?. G. How do you know it’s the oldest?. It’s on the bottom. What is the line between B & C?. An unconformity. What process changed layers C-G?. Folding.

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Chunky Geologic History

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  1. Chunky Geologic History What is happening now happened in the past.

  2. You need your ESRT

  3. What is the oldest layer? • G

  4. How do you know it’s the oldest? • It’s on the bottom.

  5. What is the line between B & C? • An unconformity

  6. What process changed layers C-G? • Folding

  7. How do you know that the sill formed after the shale layer above it? • Contact metamorphism

  8. What is the name of this index fossil? • Eurypterus

  9. During which geologic period did Eurypterus live? • Silurian

  10. Near which city in NY might these fossils be found? • Syracuse or Niagra Falls

  11. During which geologic period did the initial opening of the Atlantic Ocean take place? • Jurassic

  12. What is the estimated time of origin of Earth and solar system? • 4600 million or 4.6 billion years

  13. How long ago was the area that is now NYS on the equator? • 359 million years ago

  14. Why can’t fossils be found near Old Forge, NY? • The bedrock is not sedimentary.

  15. Why couldn’t cavemen have a battle with T. rex? • T. rex was extinct

  16. The following describes what useful tool in relative dating: Lived over a wide area for a relatively short period of time. • Index fossil

  17. Who is this guy? Elliptocephalla

  18. During which geologic period did it live? • Cambrian

  19. What radioactive isotope is used for dating wood? • C14

  20. How many half-lifes has occurred with this isotope. • 2

  21. If this isotope has a half-life of 10,000 years, what is the age of the sample? • 20,000 years

  22. What two events are good time markers because a layer of sediment is laid down quickly? • Volcanic eruption & meteor strike

  23. The meteor strike that brought dinosaurs to extinction signaled the end of which geologic era. • Mesozoic

  24. Correlate these outcrops. What is the top layer • Tan siltstone

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