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View from about 300' inside Petlog Cave, a rarely visited lava tube in the Medicine Lake Volcano area of Northern California. The cave has a couple of initial breakdown openings & this lower-elevated passage goes for about 1,500 feet w/in & contains a well-preserved passage w/ minimal breakdown. It is part of the same cave system as Harvestmen Cave which is just up the slope. The unique feature of this cave is a section of shelf that resembles a petrified log.
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