Host rockQuartz Monzonite · Intrusive Rocks Emplaced During Period Of Early Intermediate Eruptions;Early Intermediate Lavas And Breccias (Near-Source Facies)
Associated rockQuartz Monzonite,Gabbro,Andesite · Intrusive Rocks Emplaced During Period Of Early Intermediate Eruptions;Early Intermediate Lavas And Breccias (Near-Source Facies)
StructureSan Juan Volcanic Field, Summer Coon Volcanic Center, La Garita Caldera