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law that states sedimentary rock, when undisturbed is older the further you go down. |
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igeneous rock is always younger than the rock it intrudes |
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dating compared to something elses age |
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dating that is to an exact number |
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sedimentary rocks will always be layed down horizontally |
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any erosion surface creates ot, layer on top does not ____. |
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graph that shows ratio parent to daughter |
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What are offtened radio isotopes used for dating |
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major mountain building sequence |
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what are the oldest fossils called |
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what rock is found under michigan |
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waht are some events assiociated with plate techtonics that could produce a wide spread biological extinction? |
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ALL IN OCEAN primative marine life |
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oxgenation atmosphere, volcaoes |
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What is the only remain feature from paleozoic era? |
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What does the canadian sheild prove? |
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Only canada was above sea level before paleozoic era. |
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When were appalacian mtns uplifted? |
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what type of mtns is the rockies |
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what type of mtns are kalarney |
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mass extinction of trilobites, seed ferns |
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first organism to have head thorax and abdomine |
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hudson froms, rockies are uplifted |
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alps and himalayas formed |
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what are 4 types of fossils |
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resin mold cast petrification replaced remains trace |
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what time did the a)Horse b)ferms c)clams d) insects e) apes exist? |
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a. merozoic-now b. paleozoic-now c. paleozioc-now d. paleozoic-now e. cenozoic-now |
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