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?
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Out of an Ancient Sea
April 1, 2001 •
Join us for the next two Bay Nature Talks on March 10th and 18th!
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?