Maps 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
U.S. Department of the Interior, U.S. Geological Survey ; compiled by S.B. Roberts, J.L. Hynes, and C.L. Woodward ; prepared in cooperation with the Colorado Geological Survey.
U.S. Geological Survey geologic investigations series ; I-2735
[Reston, Va.?] : The Survey, 2001.
Scale 1:48,000 (W 105⁰15ʹ00ʺ--W 104⁰52ʹ30ʺ/N 40⁰08ʹ00ʺ--N 39⁰52ʹ30ʺ)
Mode of access: Internet from the USGS Web site (PDF file only). Address as of 10-31-01: http://greenwood.cr.usgs.gov/pub/i-maps/i-2735/i-2735.pdf; current access is available via PURL. System requirements: Adobe Acrobat Reader.
Title from HTML index page (viewed on Oct. 18, 2001). Distributed to depository libraries in paper on shipping list no.: 2002-0011-P. Includes location map, table, bibliographical references, 1 figure, and ancillary maps.