Ring Mountain (California)
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Ring Mountain is an elevated landform on the Tiburon Peninsula in Marin County, California. This mountain was named for George E. Ring, who served as a Marin County Supervisor from 1895 to 1903.
Ring Mountain Open Space Preserve
Phyllis Ellman Trailhead on Ring Mountain
Pecked curvilinear nucleated petroglyphs on a rock on Ring Mountain
Blueschist block embedded in serpentinite matrix melange on the west side of Ring Mountain.
Lawsonite
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Lawsonite is a hydrous calcium aluminium sorosilicate mineral with formula CaAl2Si2O72·H2O. Lawsonite crystallizes in the orthorhombic system in prismatic, often tabular crystals. Crystal twinning is
Ring Mountain (California)
…characteristic of greenschist facies, blueschist facies, amphibolite facies, and eclogite facies metamorphism and is the type location of the mineral Lawsonite. The lower slopes are underlain by greywacke sandstones and shales of prehnite-pumpellyite metamorphic grade, but the contact between the sandstones…
Sample from the type locality in California with two elongated, lustrous and translucent crystals of pastel pink, lawsonite in mica schist. Size: 6.1 cm × 3.2 cm × 2.5 cm (2.4 in × 1.3 in × 1.0 in)