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16.11: Earth's History- Challenge 2

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    1. Earth's earliest crust was made up of ___.
    2. The presence of ancient greenstones in cratons indicates the presence of ___.
    subduction zones
    3. The continental collisions that create supercontinents also create mountain ranges through the process of ___.
    4. The Paleozoic began with the supercontinent ___ and ended with the supercontinent ___.
    Rodinia; Pangaea
    5. At the end of the Paleozoic, there existed ___ and ___.
    one supercontinent called Pangaea; one super-ocean called Panthalassa
    6. Sea levels fall and land is gained from the sea during ___.
    marine regressions
    7. A rise in sea level is a marine ___.
    8. Marine transgressions and regressions leave characteristic rock layers known as sedimentary ___.
    9. The subduction of the oceanic Farallon plate beneath western North America during the late Jurassic and early Cretaceous produced ___ intrusions.
    10. The subduction of the Farallon plate created the ___ mountains.
    Sierra Nevada
    11. If vigorous seafloor spreading can cause marine transgressions, slow seafloor spreading can cause ___.
    marine regressions
    12. Africa collided with ___ to create the Alps.
    13. When Antarctica drifted over the South Pole region, ___.
    the continent began to grow an ice cap
    14. The Quaternary and Holocene are part of the ___ era.

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