![MusselRock](https://webarchive.library.unt.edu/eot2008/20081111181419im_/http://3dparks.wr.usgs.gov/3Dbayarea/images/MusselRock.jpg) |
MusselRock.jpg - Mussel Rock Park is a nature preserve that incompasses
several very large and active landslides along the San Mateo County coast.
The massive landslide deposits mask the trace of the San Andreas Fault here,
where it runs offshore into the Pacific Ocean beyond San Francisco's Golden
Gate. The high bluff along the skyline in this image has been a site of
disaster for homeowners as the seacliff continues its natural collapse and
retreat due to erosion and mass wasting. A smaller landslide in the foreground
is forming on top of a more massive landslide that extends uphill to the
base of the escarpment.
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![MusselRock](https://webarchive.library.unt.edu/eot2008/20081111181419im_/http://3dparks.wr.usgs.gov/3Dbayarea/images/MusselRock2.jpg) |
MusselRock2.jpg - This view is looking north along the coast from
Mussel Rock Park toward the eroding seacliffs Thornton State Beach and Fort
Funston (part of Golden Gate National Recreation Area). The seacliffs consist
of poorly consolidated sandstone, mudstone and shale of the Merced Formation
of Quaternary age. Highlands of Marin County are in the distance. |
![MusselRock](https://webarchive.library.unt.edu/eot2008/20081111181419im_/http://3dparks.wr.usgs.gov/3Dbayarea/images/MusselRock3.jpg) |
MusselRock3.jpg - Looking down onto Mussel Rock. Mussel Rock consist
of Mesozoic-age greenstone (altered seafloor basalt) of the Franciscan Complex.
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![MusselRock](https://webarchive.library.unt.edu/eot2008/20081111181419im_/http://3dparks.wr.usgs.gov/3Dbayarea/images/MusselRock4.jpg) |
MusselRock4.jpg - The entire green slope in the foreground is part
of the massive landslide complex at Mussel Rock Park. Thornton State Beach
is to the north in the distance. |
![MusselRock](https://webarchive.library.unt.edu/eot2008/20081111181419im_/http://3dparks.wr.usgs.gov/3Dbayarea/images/MusselRock5.jpg) |
MusselRock5.jpg - The massive landslide and escarpment at Mussel Rock
Park. |