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Black Chasm Cavern National Natural Landmark

15701 Pioneer Volcano Rd, Volcano, CA 95689, USA

Outdoors- Other
Cave

Black Chasm Cavern is a cave nestled in the hamlet of Volcano, located in Amador County, California. It is a dissolution cave, formed by sulfuric acid resulting from Geo-thermal hydrogen sulfide reacting with down-moving oxygenated surface water.

Location of Black Chasm Cavern National Natural Landmark