Resources
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The Quaternary: Mountains of Ice
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The Cenozoic: Volcanism and Tectonism
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The Mesozoic: A Story of Mountains and Seas
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The Paleozoic: Formation of a Continent
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Precambrian Beginnings: Roots of the Northwest Central
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The Northwest Central States: The Big Picture
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Geologic History of the Northwest Central US: Reconstructing the Geologic Past
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