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, a new tool to create lithological/sedimentological logs online..
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The Sequoia Underground: An Exploration of Crystal Cave
It's true that Crystal Cave in Sequoia National Park can hardly be described as a wild cave. Since its discovery in 1918 and its development as a park attraction in 1940, the cave has been visited by more than a million people. Dynamite was used by workers to widen passageways, and besides the lighting and pathways, there was a generator, and underground bathrooms. And yet there is still