OF-98-01 Geologic Map of the Basalt Quadrangle, Eagle, Garfield, and Pitkin Counties, Colorado Download Publication Details Includes cross section, booklet of extended descriptions of map units, geologic setting, economic geology, and references. Black and white map of the Basalt Quadrangle, Eagle, Garfield, and Pitkin Counties. 18 pages. 1 plate (1:24,000). Superseded by colorized, digital map MS-39. Digital PDF download. OF-98-01D Citations Streufert, Randall K., Beth L. Widmann, and Robert M. Kirkham. “OF-98-01 Geologic Map of the Basalt Quadrangle, Eagle, Garfield, and Pitkin Counties, Colorado.” Geologic, 1:24,000. Open File Report. Denver, CO: Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources, 1998. https://doi.org/10.58783/cgs.of9801.gkno8510. CGS Publications. https://coloradogeologicalsurvey.org/publications/geologic-map-basalt-quadrangle-eagle-garfield-pitkin-colorado/.