National Geologic Map Database
Product Description Page
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Title: Geologic map of the Challis 1 degree x 2 degrees quadrangle, Idaho [updated GIS data available]
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Author(s): Fisher, F.S., McIntyre, D.H., and Johnson, K.M.
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Publishing Organization: U.S. Geological Survey
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Series and Number: Miscellaneous Investigations Series Map I-1819
- Publication Date: 1992
- Map Scale: 1:250,000
- Cross Section: Yes
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.