Article by Merritt R. Blakeslee
Geography -April 2006 -Colorado Central Magazine
IN 1949 TWO GEOLOGISTS in the Denver office of the U.S. Geological Survey were assigned the task of updating the geological description of that portion of Gunnison and Chaffee counties covered by the USGS Garfield Colorado 15-minute quadrangle. The geology of this area had been cursorily surveyed by the Hayden Survey1 and was the subject of a detailed study in 1913;2 and the two geologists were charged with bringing this previous work up to date.