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Our camp in the Ponderosa Pinr forest of the Black Hills of South Dakota. |
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Jewel Cave National Monument - the second longest cave in the world. It is covered with crystals and flowstone. |
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Jewel Cave - note the "drapery" formations on the right |
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The long strip in the middle is called a ribbon - this oe looked like a giant piece of bacom due to the coloring from the iron. |
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This shows a "soda straw" - a hollow tube formed as the mineral rich water flows. |
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