State Rock
Mount Tamalpais SP
Outcroppings of green Serpentine, the state rock of California, are found all along the trails covering Mount Tamalpais, especially the Rock Springs Trail, pictured here. Photo © copyright by Robert Faucher.
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Outcroppings of green Serpentine, the state rock of California, are found all along the trails covering Mount Tamalpais, especially the Rock Springs Trail, pictured here. Photo © copyright by Robert Faucher.