![]() ![]() Evidence of human occupation of California dates from at least 17,000 BCE.As the ice sheets melt, sea levels rise 300 feet (91 m) over the next 4,000 years, and the valley fills with water from the Pacific. The rivers of the Central Valley run out to sea through a canyon that will become the Golden Gate. During the Quaternary glaciation beginning 2.58 million years ago, the basin that will be filled by the bay is a large linear valley with small hills, similar to most of the valleys of the Coast Ranges.9.5 million years ago, the Moraga Volcanics produces most of the lavas that underlie the East Bay ridges from present day Tilden Regional Park to Moraga.The San Andreas Fault (pictured) begins to form in the mid Cenozoic about 30 million years ago.Prehistory San Andreas Fault San Andreas Fault in the Bay Area Mission San Jose (Ohlone) people This is a timeline of the San Francisco Bay Area in California, events in the nine counties that border on the San Francisco Bay, and the bay itself.Īn identical list of events, formatted differently, may be found here. ( Learn how and when to remove this template message) This article may need to be rewritten to comply with Wikipedia's quality standards.
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