1. Map showing landslide deposits and areas of potential landsliding in the Parker quadrangle, Arapahoe and Douglas Counties, Colorado [cartographic material] Yale Public content 1972. 2013-02-21T16:38:28Z. 2013-03-18T20:56:37Z. Maberry, John O., 1935-. Geological Survey. English. Public. Colorado, Arapahoe County, and Douglas County.