1. Geologic map of the Highlands Ranch Quadrangle, Arapahoe and Douglas Counties, Colorado [cartographic material] Yale Public content 1977. 2012-06-05T18:41:10Z. 2012-06-13T15:04:31Z. Maberry, John O., 1935-. The Survey. English. Public. Colorado, Arapahoe County, Douglas County, and U.S.