Porphyry Basin is a basin located in San Juan County, Colorado. It appears on the Ironton USGS 7.5-minute topographic quadrangle. The nearest populated place is Chattanooga (historical), approximately 1.6 miles to the SE.
San Juan County · Colorado
Porphyry Basin is a basin located in San Juan County, Colorado. It appears on the Ironton USGS 7.5-minute topographic quadrangle. The nearest populated place is Chattanooga (historical), approximately 1.6 miles to the SE.