Maps
Explore geologic and other maps related to the USGS Energy Resources Program.
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Geologic map showing springs rich in carbon dioxide or or chloride in California Geologic map showing springs rich in carbon dioxide or or chloride in California
Carbon dioxide- and chloride-rich springs occur in all geologic provinces in California, but are most abundant in the Coast Ranges and the Great Valley. The carbon-dioxide-rich springs issue mainly from Franciscan terrane; they also are rich in boron and are of the metamorphic type (White, 1957). Based on isotopic data, either the carbon dioxide or the water, or both, may be of...