Subject: Abandoned coal mines / Spatial Coverage: Boulder County - Yale University Library GeoBlacklight Search Results

Start Over Subject Abandoned coal mines Spatial Coverage Boulder County

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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