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Geologic Map of the San Luis Hills Area, Conejos and Costilla Counties, Colorado Geologic Map of the San Luis Hills Area, Conejos and Costilla Counties, Colorado
This report is a digital image of the U.S. Geological Survey Miscellaneous Investigations Series Map I-1906, 'Geologic map of the San Luis Hills area, Conejos and Costilla Counties, Colorado,' which was published in 1989 by Thompson and Machette, scale 1:50,000 but has been unavailable in a digital version. The map area represents the southwestern portion of the Alamosa 30' x 60'...