Glen Ellen Green Valley Creek Sonoma Creek Penngrove Napa Petaluma River Napa River Fairfield Petaluma Skaggs Island COAST MIWOK American Suisun Slough Canyon PATWIN Mount Burdell y Bay Grizzl y Novato Creek a Novato B n u i s Vallejo u S S a n P a b l o B a y Car mento and San J quinez Strait Sacra oaquin Rivers Benicia Crockett Port Chicago Gallinas Creek Terra Rodeo Linda Point Walnut Creek Fairfax Pinole Martinez Pinole San Pinole Creek San Anselmo Rafael Greyson Creek Corte Madera Creek San Rafael Creek it a tr S lo Point b El Sobrante a San Pablo San Pablo Creek P San n BOLINAS RIDGE a Rafael S San Pablo B AY M I W O K Bay Wildcat Creek San Mount Tamalpais Corte Richmond Madera Quentin Mill Valley Distribution of El Cerrito Arroyo Corte Madera del Shell Mounds Presidio Tiburon S Brooks Is. in the it R a tr ic S Berkeley San Francisco h a a n r o d co s c o a Strawberry Creek n R Bay Region Sausalito B a n y Angel Is. Emeryville Recorded by Nels Nelson, 1909 Current coastline Mounds still present (1909) Mounds disappeared te O a k l a n d Ga en 0 1 2 3 4 ld Go Yerba Lake Buena Is. Merritt MILES F Alameda San Francisco r P a M. galloprovincialis a San Leandro c i Lake n f Merced San Leandro Creek i c c Castro Valley O Daily i City c San Lorenzo Creek e s South a San Francisco c FREMONT HILLS n Ostrea lurida o Hayward Pacifica San B Andreas Lake Millbrae a Alameda Creek y San Mateo Mytilus trossulus San Vincente Creek SANTA CRUZ MOUNTAINS Montara COSTANOAN Fremont Denniston Creek Half Moon Bay H al f M Milpitas oo n Arroyo Ojo Menlo Park B ay San Fransquito Creek Alviso Palo Alto San Tomas AquinoGuadalupe Creek River Stanford Mountain View Magallana gigas Santa Clara Map adapted by John Blanchard Sources: Nels Nelson, 1909; Open Street map; Stamen relief maps San Jose.