Geology of the Mount Aetna Volcanic Center, Chaffee and Gunnison Counties, Colorado, U.S. Geological Survey Bulletin 1864
Denver, CO: United States Government Printing Office, 1990. softcover, stapled binding, 11" tall, clean tight copy, foldout map inside rear cover, 44 pages. A description of a deeply eroded mid-Tertiary volcano on the southern fringes of the Mount Princeton batholith in the Sawatch Range. DS1. More