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2. Map showing outcrops of pre-quaternary ash-flow tuffs and volcani-clastic rocks, basin and range province, Nevada
3. Map showing outcrops of pre-quaternary basaltic rocks, basin and range province, Oregon
4. Map showing outcrops of pre-Quaternary ash-flow tuffs and volcaniclastic rocks, basin and range province, Arizona
5. Map showing outcrops of pre-quaternary basaltic rocks, basin and range province, Arizona
6. Map showing total thickness of the Swift Formation, Montana
7. Map showing total thickness of the Fox Hills-Lower Hell Creek aquifer, Montana
8. Map showing total thickness of the Lakota Formation and equivalent rocks, Montana
9. Map showing altitude of the top of the Lakota Formation and equivalent rocks, Montana
10. Map showing altitude of the top of the Eagle Sandstone, Montana
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