October 20, 2013 — A narrow band of white volcanic tuff in Bouquet Canyon. Located on the north (northeast) side of Coarse Gold Road, about 0.9 miles west of the Coarse Gold turnoff from Bouquet Canyon Road. Coarse Gold Road is a U.S. Forest Service road.
Tuff is condensed volcanic ash that's ejected from vents during an eruption. Volcanic ash, by definition, is less than 2mm in diameter, basically a grain of sand or smaller. It can be magma or rock that's pulverized when blasted into the air by gases.
Some of the tuff at this location is chalky to the touch; when ground up, it is like a fine talc.
Some say it is possible at this location to find fossilized leaves of 12-million-year-old trees including live oak, sycamore, sumac and mountain mohogany, among others.
If we'd been able to verify it, we'd be showing you a closeup.