Rocks in the San Francisco Bay, California
Castro Rocks with harbor seals TheCastro Rocks are several rocks inRichmond, California , protruding from the waters inSan Francisco Bay betweenCastro Point andRed Rock Island . The rocks lie almost directly under theRichmond-San Rafael Bridge (I-580 ).[ 1]
The Castro Rocks are named after DonVíctor Castro , aCalifornio ranchero and politician. The rocks are named afterDon Víctor Castro , a local rancho-era land owner.[citation needed They are shown as "Castro Rocks" on an 1850 survey map of theSan Francisco Bay area made byCadwalader Ringgold .[ 2]
Castro Rocks are the home of manyharbor seals ,[ 3] [ 4] [ 5] Mowry Slough ,Brooks Island ,Yerba Buena Island , andMare Island .[ 6]
The seals at this location have high levels of toxic pollutants including theDDT ,PCBs ,PBDEs ,PFOS ,PFOA , andmercury .[ 7]
^ Topographic map , TopoQuest, retrieved July 6, 2008^ Ringgold, Cadwalader; Stuart, Fred D.; Everett, Chas.; Harrison (1850)."General Chart embracing Surveys of the Farallones Entrance to the Bay of San Francisco, Bays of San Francisco and San Pablo, Straits of Carquines and Suisun Bay, and the Sacramento and San Joaquin Rivers, to the Cities of Sacramento and San Joaquin, California" .David Rumsey Map Collection . San Francisco Common Council. Retrieved25 February 2021 . ^ Tagging program Archived 2007-09-09 at theWayback Machine , SFSU, retrieved August 1, 2007^ SFSU Archived 2007-09-06 at theWayback Machine , Castro Rocks page, retrieved August 1, 2007^ NOAA Seeks Comments On A Proposed Reauthorization For California Department Of Transportation To Harass Seals During Bridge Reconstruction Archived 2008-02-12 at theWayback Machine , NOAA Press Release, February 12, 1999, retrieved August 4, 2007^ vhfmapweb.jpg Archived September 11, 2007, at theWayback Machine , Radio tagging map, San Francisco State University, February 2004, retrieved August 4, 2007^ Harbor seals may help determine effect on humans of eating toxic fish , by Jane Kay,San Francisco Chronicle 37°55′58″N 122°25′01″W / 37.932817°N 122.416963°W /37.932817; -122.416963
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