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200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 Early Times Law of Super Position CategoriesChangesGrab Bag
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During the days of the dinosaurs, Where was Devils Tower?
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Under water
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The time of the Dinosaurs was known as what?
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Cretaceous
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Itty bitty particles that settle on the ocean floor
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Sediments
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After millions of years, these particles can harden into
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Sedimentary rock
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Which rocks were deposited first?
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Older rocks
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On the plains, which rocks are found close to the surface?
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Younger rocks
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Older rocks deposited first with younger rocks deposited last is what Law?
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The Law of Super position
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Which layer is the oldest?
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The Spearfish Formation
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What happened to Devils Tower about 66 to 44 MYA?
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Devils tower was no longer under water
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The Rocky Mountains and the Black Hills began to form. This is known as the
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Laramide Orogeny
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As the Black Hills were uplifted, What happened to the rock layers?
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The rocks were bent and cracked
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What forced its way up into the cracks in the rocks?
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Magma
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What happened to the Magma?
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The magma cooled and hardened – It took millions of years.
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Molten rock that cools and hardens is called what type of rock?
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Igneous
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Who said “To infinity – and beyond!”
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Who is Buzz Lightyear?
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Bulges on the Earth’s surface are called what type of mountain?
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Dome mountains
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What is a famous dome mountain found near Sturgis, South Dakota?
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Bear Butte
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There used to be many more layers of rock above and around Devils Tower. What is the term that caused them to disappear?
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Erosion
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Why isn’t Devils Tower eroded away like the sedimentary rocks that used to be on top of it?
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The rock that makes up Devils Tower is harder
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Daily Double!!! What other important event happened about 65 mya?
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The dinosaurs all died.
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Itty Bitty organisms can become
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Limestone
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Some ancient forests became
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COAL
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Does erosion make rocks bigger or smaller?
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smaller
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What type of rock is this?
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Igneous rock
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Is Devils Tower made of sedimentary rock?
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Devils Tower is made of IGNEOUS rock
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Final Jeopardy! Choose the amount you wish to risk…
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After millions and millions of years, what will happen to Devils Tower?
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It will erode away.
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