1. Geologic map of the Alamosa 30' X 60' minute quadrangle, south-central Colorado Author/Creator: Thompson, Ren A., cartographer Publication/Creation: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 2015 Format: Map Access & Availability: Loading
2. Geologic map of the Trinchera Peak quadrangle, Costilla, Huerfano, and Las Animas counties, Colorado Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Information Services Format: Map Access & Availability: Loading
3. Reconnaissance geologic map of the Cucharas Pass quadrangle, Huerfano and Las Animas counties, Colorado Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Information Services Format: Map Access & Availability: Loading
4. Geologic and structure-contour map of the Raton 30ʹ x 60ʹ quadrangle, Colfax and Union counties, New Mexico, and Las Animas County, Colorado Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Format: Map Access & Availability: Loading