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Humbug
DogwoodGold Lake
Boca RidgeAlder Hill
Putnam Peak
Putnam Peak
Putnam Peak
Boca Spring
Watson Creek
Martis Creek
Davies Creek
Secret Meadow
Fillmore Hill
Sawtooth Ridge
Emigrant Ridge
Doud's Landing
IndependenceLake
Siefried Canyon Ridge
Alturas Airport Unknown
Meathouse Meadow
Seigler Creek
MODOCSISKIYOU
SHASTALASSEN
TEHEMA
PLUMAS
BUTTE
GLENN
SIERRA
MENDOCINO
TRINITY
COLUSALAKE
SONOMA NAPA
YOLO
SUTTER YUBANEVADA
PLACER
EL DORADO
SACRAMENTOAMADOR
ALPINE
SAN JOAQUINMARIN
SOLANO
CONTRA COSTA
CALAVERA
TUOLUMNE
0 30 6015
Kilometers FGV Source
´Northwest Research Obsidian Studies Laboratorywww.obsidianlab.comwww.sourcecatalog.comNovember 1, 2011
FINE-GRAINED VOLCANIC (FGV) TOOLSTONE SOURCESNorthern California
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