Source location

Location of the Kelly Mountain source

NAME KELLY MOUNTAIN
LOCATION Plumas County, California.
CHEMICAL
SOURCE(S) 		Kelly Mountain.
DESCRIPTION
Kelly Mountain obsidian Kelly Mountain obsidian

With their prominent phenocrysts and variegated black and mahogany colors,
the flakes above are typical of those from the Kelly Mountain source.

Glass from this source is of marginal artifact quality and was utilized primarily in the local vicinity of the source. Outside of the local source area, glass from Kelly Mountain is only rarely encountered. Obsidian from the source typically contains small phenocrysts and is commonly mahogany and black in color.

The trace element composition of glass from this source is similar to that of the East Medicine Lake source (Medicine Lake Volcano area) and the determination of barium is sometimes necessary to accurately distinguish between the two sources.

REFERENCES Ericson 1981
Hughes 1986:309-310
CREDITS Specimens for trace element analysis were provided by Mike Dugas (Lassen National Forest).

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Last Updated: 02/22/2004 Compiled by Northwest Research Obsidian Studies Laboratory