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2013-04-24 16:42:03

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  1. What three periods comprise the mesozoic?
    • Triassic
    • Jurassic
    • Cretaceous
  2. Globally, what happens during the Mesozoic?
    The break up of pangea although it doesnt start until the end of the triassic
  3. What time period do the outcrops of North America come from?
    Mainly the cretaceous, there are barely any from the jurassic or triassic
  4. What are rift evaporites?
    As pangea rifted, shallow warm seas flooded in and evaporites were formed extensively
  5. What happens to the climate during the mesozic?
    The continental climate gets cooler as Pangea splits up.
  6. What is the Sonoma Orogeny?
    a volcanic island arc hits the west of the United States in the beginning of the Triassic
  7. What is the Chinle Formation?
    Proves that Pangea was not completely desertous as these rocks werelayed down in very wet forrested areas.  The petrified forest is part of this formation
  8. When does East Coast rifting occur?
    The end of the triassic
  9. What caused the Pallisades?
    Igneous activity from rifting
  10. When was the Cordilleran Orogeny and where did it take place?
    From tge Jurassic onwards, west coast
  11. What is the Farallon plate?
    An oceanic plate that was subducted under the west coast and caused the Cordilleran Orogeny
  12. What are the Navajo Sandstones?
    A jurassic deposit of desert sand dunes
  13. What was the sundance sea?
    A jurassic shallow sea that flooded the interior of North America
  14. What is the Morrison formation?
    Consists of deposits that were layed down in and around the sundance sea, famous for dino fossils.  Jurassic in age.
  15. Where is the Dinosaur National Monument?
    On top of the Morrison formation
  16. What was the Cretaceous interior seaway?
    North American interior seaway caused by faster spreading rates of continents
  17. What is special about the DFW cretaceous strata?
    It shows the transgression and regression of the Interior seaway
  18. What are coccoliths?
    microscopic creatures that form chalk
  19. What is special about the kimberly diamonds?
    They were brought up as a result of volcanic activity associated with the breakup of pangea in South Africa
  20. What was the Triassic Recovery?
    The first third of the triassic when life recovered from the extinction event
  21. When did dinosaurs evolve?
    During the Triassic
  22. How many extra holes do archosaurs have in their skull?
  23. What was special about these archosaurs?
    They had a vertical active posture
  24. What type of blood did they appear to have?
  25. What was the first known dinosaur?
  26. How were the saurischians and ornothischians different?
    They had different pelvic structures and saurichiands were mostly carnivours while ornothischians were mainly herbivores
  27. Why were feathers origially evolved?
    Insulation but later for ornamentation and attraction.
  28. What did the evolution of feathers create?
  29. What is the first known bird?
  30. What were the pterosaurs?
    They evolved in the triassic with a distinct anatomy for flight
  31. What was special about the marine reptiles?
    They evolved in the permian but increased in diversity during the mesozoic
  32. When did the first true mammals evolve?
    The triassic
  33. What was the first mammal?
  34. What were angiosperms?
    Flowering plants
  35. What was the first flowering plant?
  36. When did the extinction event occur and what does it mark?
    At the end of the cretaceous, the boundary between cretaceous and cenozoic
  37. Where was the Chichulub crater and why is it significant?
    The yucatan peninsula, significant because it seems to be where the meteorite struck that killed off 65% of life.
  38. What were the Deccan Traps?
    They were located in india and showed a huge outpouring of lava as well as poisonous gas.
  39. What is the Shiva Crater?
    A controversial crater that may be bigger that the chicxulub and may have actually helped with the extinction event