Title: Altered wallrocks in the central part of the Front Range mineral belt, Gilpin and Clear Creek Counties, Colorado
Subjects: Geology, Hydrothermal alteration, Igneous Rocks, Metamorphic Rocks, Metamorphism, Metamorphism (Geology), Mineralogy, Ore deposits, Petrology
Places: Clear Creek County, Colorado, Front Range, Front Range (Colo. and Wyo.), Gilpin County