Source location

Location of the Annadel source

NAME ANNADEL
LOCATION Sonoma County, North Coast Ranges, central western California.
CHEMICAL
SOURCE(S) 		Annadel.
DESCRIPTION The Annadel obsidian source is located within Annadel State Park and consists of a series of obsidian quarries and workshops. Two other geochemically-distinct minor sources of glass, Guilicos A and B, are also known from Annadel State Park, although these sources are only rarely recognized in archaeological contexts. Prehistoric source use of the main Annadel source is documented primarily from the local North Coast Ranges region surrounding the source. Artifacts from the source are also relatively common at archaeological sites in the San Francisco Bay region and central Great Valley.

Obsidian Hydration:Experimental evidence suggests that obsidian from this source hydrates at a slower rate than obsidian from the Napa Valley source.

REFERENCES Basgall 1993
Ericson 1981
Ericson et al. 1976
Fox 1983
Frederickson 1989
Heizer and Treganza 1944
Higgins 1983
Jackson 1986, 1989
Origer 1987
Parkman 1983
Tremaine 1989, 1993
Tremaine and Fredrickson 1988
CREDITS --

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Last Updated: 08/12/2004 Compiled by Northwest Research Obsidian Studies Laboratory