![67.2 Serpentinite gneiss. Bolinas-Fairfax Road, near Azalea Hill, Marin County, California. Aligned light yellow-green to darker blue-green serpentinite form a gneiss with black serpentinite veins oriented generally parallel to the foliation. Additional veins occur in an orientation generally perpendicular to the foliation. Analyses of similar blocks of serpentinite showed the serpentine to be antigorite. [Scale is standard GSA scale with cm divisions.]](../67.2.JPG)
67.2 Serpentinite gneiss. Bolinas-Fairfax Road, near Azalea Hill, Marin County, California. Aligned light yellow-green to darker blue-green serpentinite form a gneiss with black serpentinite veins oriented generally parallel to the foliation. Additional veins occur in an orientation generally perpendicular to the foliation. Analyses of similar blocks of serpentinite showed the serpentine to be antigorite. [Scale is standard GSA scale with cm divisions.]