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Salt is extracted from seawater by natural evaporation in shallow ponds ringing San Francisco Bay.
mouth of Alameda Creek, north of Coyote Hills RP, near Newark, CA (1980).
Borax mined in Death Valley was originally transported to market in heavy wagons drawn by 20 mules.
Harmony Borax Mill, Death Valley NM, CA (1985).
Solar salt produced around San Francisco Bay is harvested in the fall, following the long dry summer.
Oliver Brothers Salt Company, Hayward, CA (1977).