Manson impact structure
Manson impact structure
74 million year old impact structure in Iowa.
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Western Interior Seaway
Prehistoric inland sea that split the continent of North America.
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Eugene Merle Shoemaker
American geologist and astronomer (1928–1997).
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Manson, Iowa
City in Calhoun County, Iowa, United States.
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Cretaceous
Third and last period of the Mesozoic Era.
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Dinosaur
Clade of reptiles.
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Till
Unsorted glacial sediment.
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