Photographer Ted Grussing captured this image of the San Francisco Peaks on 9 Oct. 2018. The winter's first snow mantles the peaks and the flaming gold quaking aspen trees blanket the middle slopes.
The Pleistocene San Francisco Mountain is a stratovolcano and the largest volcanic vent in the San Francisco volcanic field.
Online resources:
Holm, 1988, Geologic Map of San Francisco Mountain, Elden Mountain and Dry Lake Hills, Arizona. https://ngmdb.usgs.gov/Prodesc/proddesc_9878.htm
Bezy, J.V., 2003, A Guide to the Geology of the Flagstaff Area.DTE-14, 56 p. http://repository.azgs.az.gov/uri_gin/azgs/dlio/1540