The Glenwood Springs quadrangle covers about 58 square miles in Garfield County, and includes the town of Glenwood Springs near the center of the quadrangle. Includes two cross sections; booklet of extended description of map units, rock analysis table; and references. 22 pages. 1 color plate (1:24,000). Digital PDF download. MS-31D
Note that MS-31 is the digitally produced, full color version of the original black and white Open File Report OF-95-03. The mapped units in MS-31 match those in OF-95-03. However, MS-31 was subsequently updated by MS-38, which resulted in slight modifications to some of the mapped units. For example, MS-38 incorporates (1) improved knowledge of the regional late Cenozoic evaporite collapse, and (2) more recent results of detailed mapping of the Proterozoic.