Quarry for extraction of a beautiful green lapidary-grade calcite locally called "onyx marble". Pliocene beds, alternating compact and porous layers, hosted discordantly in sedimentary and metamorphic country rock. Color varies from yellowish green to grayish green, with veins of brownish limonitic alteration. Younger, less abundant aragonite, grey to white, filling fractures. A little celestine is also found. Recent secondary travertine occurs in surroundings.
