Black Chasm Cavern National Natural Landmark
15701 Pioneer Volcano Rd, Volcano, CA 95689, USA
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