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Geology of San Francisco city + county — in the San Francisco Bay Area of California. Subcategories. This category has the following 2 subcategories, out of 2 total. H.
The Franciscan Complex or Franciscan Assemblage is a geologic term for a late Mesozoic terrane of heterogeneous rocks found throughout the California Coast Ranges, and particularly on the San Francisco Peninsula. It was named by geologist Andrew Lawson, who also named the San Andreas Fault that defines the western extent of the assemblage. [1]
In 1893, the San Francisco Call confidently bragged that according to an agent from the United States Department of Labor, there were no slums in the city. Although Chinatown was mentioned as a notable exception, the "unsavory, unsightly quarter" was thought to be "rapidly growing smaller and may finally reach the vanishing point" as immigration had been throttled by the Chinese Exclusion Act ...
The oldest rocks in California date back 1.8 billion years to the Proterozoic and are found in the San Gabriel Mountains, San Bernardino Mountains, and Mojave Desert.The rocks of eastern California formed a shallow continental shelf, with massive deposition of limestone during the Paleozoic, and sediments from this time are common in the Sierra Nevada, Klamath Mountains and eastern Transverse ...
The Mussel Rock formation itself is a sea stack of Cretaceous period greenstone, from the Franciscan Complex bedrock, dated 80 to 90 million years ago.Contrasted with the nearby 3 million year old sedimentary rocks of the Merced Formation, the metamorphosed marine basalt comprising the greenstone of the Mussel Rock Formation from the Franciscan complex is more resistant to erosive forces.
A two-day pogrom is waged against Chinese immigrants in San Francisco by the city's majority white population, resulting in four deaths and the destruction of more than $100,000 worth of property belonging to the city's Chinese immigrant population. The Argonaut literary journal is founded by Frank M. Pixley (pictured) in San Francisco
The Hetch Hetchy Aqueduct, which supplies 270 to 315 million gallons of water per day to the City of San Francisco and other Bay Area communities, directly crosses the Hayward Fault in Fremont. A 2002 report by the Bay Area Economic Forum suggests that a breakdown in the aqueduct due to an earthquake could cut off Hetch Hetchy water to the Bay ...
Perhaps by Alexander Gardner, 'Seal Rocks' in Pacific Ocean, near San Francisco, from Across the Continent on the Kansas Pacific Railway, 1869. Seal Rocks, Cliff House, San Francisco, California. Seal Rock (or Seal Rocks) is a group of small rock formation islands in the Lands End area of the Outer Richmond District in western San Francisco ...