Friday, January 16, 1970

Places: CA-Pluto's Cave


Pluto's Cave (quad)   (long, lat)
Pluto's Mine-705' (Valley Springs)   (38.2235290, -120.8491041)
Mount Pluto-8,609' (Tahoe City)   (39.2415733, -120.1396385)

Description:
Forest Service: Pluto's Cave is a lava tube that was formed by an eruption of basaltic lava which originated from a vent about 8 miles to the northeast, between Deer Mountain and The Whaleback. Visitors can safely hike approx 1200 feet into the cave.

October 10 in the morning we went to visit a cave about three-quarters of a mile distant, just discovered, and of which extraordinary stories were told. It was, indeed, quite a curiosity. It is called Pluto’s Cave. The surface of the country is a gentle lava slope, very rocky, with but little soil and with stunted cedars and bushes, the lava rising into innumerable hummocks a few feet high. Under this the cave extends. It looks as if the surface of the great lava flow had cooled, but that the crust had broken somewhere lower down and a long stream of the fluid had run out, leaving a long, empty channel or gallery. The roof of this gallery is beautifully arched—in places it is at least fifty feet high and as many broad. The bottom is of broken blocks of lava, and the sides are occasionally ornamented with fantastic shapes of stone, where the melted or viscous fluid has oozed through cracks, sometimes in a thick, black stream, like tar, then cooled, in others like froth on the surface of the molten mass—but all now cool enough, hard, rough, black rock. We went in near a mile, to the end, or at least to where the fallen fragments blocked up the way.  Multitudes of bats lived in it, even to the very end. Near the entrance the roof had broken in in several places, and there were many skulls of mountain sheep that had got in and perished. From Up and Down California by William Brewer, Book 4  Chapter 7


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