Flowstone

Flowstone is perhaps the most common of all cave deposits and is almost always composed of calcite or other carbonate minerals. It forms in thin layers which initially take on the shape of the underlying floor or wall bedrock beneath but tends to become rounded as it gets thicker. Flowstone masses are often fluted with draperies at their lower end, such as the area above the caver’s head. Impurities in the calcite may give a variety of colors to flowstone, such as the reddish areas on the right (likely due to iron).

Flowstone forms from actively flowing water (rather than water squeezed through cracks) in which carbon dioxide is lost, and carbonate material is deposited. This is the basic mechanism forming stalagmites as well, and the two often form together.

Continuous flowstone deposits may cover vast areas of a cave floor or flow for hundreds of vertical feet down the side of vertical shafts.

Virtual Cave Index:

Solutional Caves

Lava Tubes

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Sea Caves

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Erosional & Glacier Caves

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Cave Biology

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Cave Biology

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