The San Francisco Bay Area’s crazy quilt-pattern of rock formations — shaped by earthquakes — are the key to understanding the region’s landscapes. From ice-age dune sand in San Francisco to recently subsided land in the Santa Clara Valley or the veritable maze of earthquake faults in the East Bay, the geology is a fascinating blueprint of the region’s natural history.
The oak-dotted, rounded hills of Contra Costa and eastern Alameda counties are a familiar sight, but do you know how they got to be that way?
Still trying to sort through the confusion of rocks and minerals that make up the Bay Area? Then you might want to visit the Menlo Park offices of the U.S....
Independent, nonprofit environmental journalism connecting people with nature in the San Francisco Bay Area.
