https://www.kqed.org/news/11704679/there-were-once-more-than-425-shellmounds-in-the-bay-area-where-did-they-go?fbclid=IwAR3pSCC4XUlkA86Lqv9R-0o0GtzlsCHFb-8IoU90UlJEM3eiutCmMz0NxhY
There Were Once More Than 425 Shellmounds in the Bay Area. Where Did They Go? | KQED
Shellmounds were used by Ohlone people as burial sites. People used them to navigate bay waters, and gathered on top of them. Now almost all the more than 425...