⁴⁰Ar/³⁹Ar age of the Manson, Iowa, impact structure and coeval impact ejecta in the Crow Creek member of the Pierre Shale, South Dakota and Nebraska
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Reston, Va. :
U.S. Dept. of the Interior, Geological Survey,
[1997]
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| Series: | U.S. Geological Survey open-file report
97-523 |
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