Chapter 12- Geologic Time Quiz – Flashcards
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If the relative age of two formations (with respect to one another) is known, then the numerical ages for each formation can be determined
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False
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Relative ages expressed on the geologic time scale primarily resulted from the study of
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Fossil content and spatial relationships among sedimentary rocks
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Uniformitarianism is succinctly summarized by which phrase
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The present is the key to the past
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In an undisturbed sequence of sedimentary rocks, younger layers overlay older layers. This is the principle of
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Superposition
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Precisely speaking, a measured radiometric age for a mineral crystal within an igneous rock denotes the amount of the time that has passed since the
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Temperature of the crystal became equal to the closure temperature for that material
