Black Chasm Cave

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Black Chasm Cave is a cave near Volcano, California and is a National Natural Landmark. Black Chasm Cave was designated as a National Natural Landmark by the National Park Service in 1976. It was recommended for this protection by members of the National Speleological Society who had made explorations of its numerous chambers in the 1960s. One of the outstanding geological features of this cave (and a major reason for its NNL designation) is the profusion of helictite crystals located in the Landmark Room. These unusual speleothems or formations are probably created by hydrostatic pressure (although there is still some speculation on the exact cause) resulting in horizontal orientation.