Hauling field gear up Gothic Mountain…
A detailed comparison of the Permo-Pennsylvanian strata in the Sangre de Cristo, San Juan, Crested Butte, and other areas of southwestern Colorado and north-central New Mexico, shows that the Permo-Pennsylvanian mountains in southwestern Colorado occupied the position of the present San Luis Valley, La Garita Hills, Cochetopa Hills, Vernal Mesa, Uncompahgre Plateau, and probably extended even farther to the northwest. This ancient highland is named the "San Luis Mountains."
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