A slightly modified color digital update of Colorado Geological Survey Open-File Report OF-97-01. This 7.5 minute quadrangle is located east of Durango, and includes portions of the Florida River and Los Pinos River, Texas Creek, and the small town of Columbus. The higher elevations include Rules Hill. The geologic structure of this quadrangle is shaped by the San Juan basin and Hogback Monocline. Both the upper and lower axis of the Hogback Monocline are present in the quadrangle. 2 plates (map, cross section and 3-D oblique view) and GIS data. Digital ZIP download. OF-14-11D.