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GEOLOGIC TIME

GEOLOGIC TIME. Time scale app?. PRECAMBRAIN. Longest era Earth was inhospitable Still cooling No atmosphere. Oldest known fossil 3.5 billion years cynobacteria Began producing oxygen Simple cell- no nucleus. STROMATOLITES. PALEOZOIC. Life flourishes in the ocean

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GEOLOGIC TIME

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  1. GEOLOGIC TIME Time scale app?

  2. PRECAMBRAIN • Longest era • Earth was inhospitable • Still cooling • No atmosphere

  3. Oldest known fossil 3.5 billion years cynobacteria Began producing oxygen Simple cell- no nucleus STROMATOLITES

  4. PALEOZOIC • Life flourishes in the ocean • Trilobites dominate era

  5. Cambrian • Multi-cellular life in seas begin • First shells

  6. First fish Ordovician

  7. Ordovician

  8. First land plants Fern-like Sea life continues to flourish SILURIAN ammonite

  9. DEVONIAN • Fish/ sharks • First insects appear

  10. swampy Huge insects Eventually created coal deposits Carboniferous(Mississippian & Pennsylvanian)

  11. Reptiles First amphibians Life in sea and land thriving PERMIAN

  12. MASS EXTINCTION THE GREAT DYING 80% of species went extinct!

  13. What happened? • Climate got hotter • Siberian traps • volcanoes = CO2

  14. MESOZOIC • Dinosaurs now dominate • PANGEA is formed

  15. Beginning of dinosaurs Many small Primitive mammals TRIASSIC

  16. Dinosaurs get bigger First birds JURASSIC

  17. ARCHAEOPTERYX

  18. CRETACEOUS • Intelligent dinosaurs (T-rex, raptors) • First flowering plants • Carnivorous mammals

  19. MASS EXTINCTION K/T BOUNDARY Dinosaurs go extinct

  20. Asteroid theory • Asteroid caused climate change • 1st- dust blocked out sun • 2nd- trapped in heat

  21. Evidence for asteroid theory? • Crater • Irridium • Found in space rocks • Shocked quartz

  22. Mammals dominate- CENOZOIC

  23. Tertiary • Mammals • First hominoids

  24. ArdiArdipithecus ramidus • 4.4 my

  25. Lucy • 3.5 my • Bipedal hominid

  26. Lucy LUCY LUCY

  27. ice ages Mammoths/mastodons Neanderthals QUATERNARY

  28. present • When will a new geologic time period start?

  29. resources • http://universe-review.ca/R10-19-animals.htm

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