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The history of Earth can be found in the rocks that cover it. The type of rock, the minerals it contains, the size and shape of the sediments or crystals, and the presence or lack of fossils provide clues to the processes that formed the rock and the conditions that existed at the time it was formed.


Define the following:

1. Principle of Uniformitarianism

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2. Principle of Superposition

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Observation Questions:

1. What process formed the rock?

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2. What type of sediment is in the rock (size or composition)?

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3. In what environment might the sediments have been deposited?

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4. What was the possible agent of erosion or deposition?

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Geologic Profiles A B C D Conglomerate Breccia Conglomerate Breccia Sandstone Shale Shale Sandstone Limestone Dolostone Rock Salt Rock Gypsum Rock Gypsum Limestone Limestone Rock Salt Coal Coal Coal Coal Procedure: 1. Using the geologic profile assigned to you, arrange your rock samples from oldest to youngest. 2. Complete in the table by writing the observable characteristics in the second column and the inferences based on your observation in the third column. Rock Type Observations Inferences

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Geologic Profiles A B C D Conglomerate Breccia Conglomerate Breccia Sandstone Shale Shale Sandstone Limestone Dolostone Rock Salt Rock Gypsum Rock...
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