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PALEONTOLOGY

PALEONTOLOGY. STUDY OF ANCIENT LIFE (Not humans). Smithsonian. What is a fossil?. Evidence of life preserved in rock Age?. What becomes a fossil?. Hard parts! Shells, bones, teeth, wood Buried quickly Sea life floods Replaced by rock (petrified) Atom by atom replacement RARE.

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PALEONTOLOGY

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  1. PALEONTOLOGY STUDY OF ANCIENT LIFE (Not humans)

  2. Smithsonian

  3. What is a fossil? • Evidence of life preserved in rock • Age?

  4. What becomes a fossil? • Hard parts! • Shells, bones, teeth, wood • Buried quickly • Sea life • floods • Replaced by rock (petrified) • Atom by atom replacement RARE

  5. Type of fossils • Cast- replacement of living organism • Most common • Mold- imprint of organism • Resins- petrified sap (amber) tar may preserve actual critter

  6. Cast and molds

  7. Mold; cast

  8. Cast or mold?

  9. ammonites

  10. amber

  11. Trace fossils • Indirect evidence (not actual organism) • Tracks • Burrows • Coprolite • gastrolith

  12. Where to look for fossils? • Fine sediment • Time period? • Dino fossils in Wyoming

  13. Make latex mold out of actual fossil Pour plaster into mold to replicate fossil Paint it Making of a museum display

  14. Fake!

  15. Dinosaur Bones to Model • Many bones are usually found together • Who’s bones are who’s? • Not entire dino is found

  16. Fossil pile

  17. Brontosaurus story

  18. Lot of unknowns • Color of skin? • Didn’t drag tails! • Muscle structure? • Sounds?

  19. Apatosaurus- goof by US postal service

  20. Jurassic Park problems • No blood inside amber insects ever found • No dino DNA ever found • DNA deteriorates over time- only partial • most meals are extinct too • Most dinos portrayed were Cretaceous

  21. T-REX SUE The most famous dinosaur ever!

  22. First glimpse, with discoverer Sue HendricksonAugust, 1990

  23. All volunteers furiously dig Sue out

  24. The skull is found intactAug. 22, 1990

  25. Every bone is incased in plaster

  26. Preparing the skull by the Black Hills Institute, 1991

  27. Finished Skull

  28. Teeth

  29. Artist rendition

  30. Other bones were found with Sue

  31. Forearm; only two ever found from a T-Rex

  32. Sue’s wishbonefirst one ever found in a T-Rex

  33. Bones are seizedMay14, 1992

  34. On display at the Chicago Field MuseumMay 17, 2000

  35. Only bones not found, seen in black

  36. Working paleontologist at the McDonalds Lab in the Field Museum

  37. Petrified Forest

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