1995. 2002-06-01T04:00:00Z. 2016-07-20T21:24:09Z. O'Sullivan, Robert Brett, 1923-. U.S. Geological Survey ; For sale by U.S. Geological Survey Information Services. English. cartographic image. Public. Colorado, Montezuma County, Dolores County, San Miguel County, Dolores County., Montezuma County., and San Miguel County. Jurassic.