Subject: Abandoned coal mines / Language: English - Yale University Library GeoBlacklight Search Results

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1. Map showing the extent of mining, locations of mine shafts, adits, air shafts, and bedrock faults, and thickness of overburden above abandoned coal mines in the Boulder-Weld Coal Field, Boulder, Weld, and Adams counties, Colorado [computer file]

2001. 2002-06-01T04:00:00Z. 2023-02-11T04:46:19Z. Geological Survey (U.S.). The Survey. English. Public. Colorado, Boulder County, Weld County, and Adams County.

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1. Map showing the extent of mining, locations of mine shafts, adits, air shafts, and bedrock faults, and thickness of overburden above abandoned coal mines in the Boulder-Weld Coal Field, Boulder, Weld, and Adams counties, Colorado [computer file]

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