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Geology Subjects 'Cave Bacon' / - Andradite Andradite - Aurichalcite Aurichalcite - Barite on Plancheite Barite on Quartz - Bonneville Salt Flats Bournonite - Caledonite Campito Mountain (California) - Chalcocite Chalcocite - Close-up of Rock Cobaltian Dolomite - Covellite Crater Mountain (California) - Devil's Homestead Lava Dillon Pinnacles / - Electrum on Quartz En-echelon Veins in - Fiery Furnace Area Fin Canyon area - Frost Cracking of Fumarole / Lassen - Glacial Till Glacial Till - Gold and Chalcopyrite Gold and Coloradoite - Gold Wires Gold with Fluorite - Hematite with Quartz Hemimorphite - Jointing in the Jurrasic Aztec Sandstone - Leightonite Lembert Dome / - Megabreccia in the Mesolite on Analcime - Mt. Conness and Mt. Dome / - Navajo Sandstone Navajo sandstone and - Pahoehoe Lava / Painted Dunes at - Prehnite Prehnite - Pyromorphite Pyromorphite - Rhodochrosite and Sphalerite Rhodochrosite and Sphalerite - Rosasite Royal Arches / - Serpentinite Outcrop (Serpentine) Shastina Crater on - Smithsonite on Rosasite Smoky Quartz - Squeeze-ups on a Stalactites / Lehman - Sulfur Sulfur - Thermal Pool at Thermal Pools along - Turret Arch / Turret Arch Area - Volcanic Crater/ Ubehebe Volcanic Dome - - Witherite Wollastonite in Calcite - Witherite