Beach Rocks

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Member: Pinetree3
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Rocks strewn on the beach near Alameda Park.


Guest - Aug 23, 2005 09:35 PM EDT
This is a good question. I never thought to ask where they come from. This area on San Francisco Bay is built on fill. The base of the fill is made up is largely chunks of concrete. I think these "rocks" are really sea-worn concrete. I believe they have pulled down onto the beach from higher ground when we have had storms.
Guest - Aug 17, 2005 10:56 AM EDT
Ouch! This would be hard on bare feet. Does the surf bring these up from the ocean or do they roll down from the land?

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