File:Travertine drapery (cave bacon) (Shenandoah Caverns, Quicksburg, Virginia, USA) 9.jpg

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English: Travertine drapery ("cave bacon") in a cave in Virginia, USA.

"Cave formations" in caves are technically called speleothem. Most speleothem is composed of travertine, a crystalline-textured chemical sedimentary rock composed of calcite (CaCO3). Travertine forms in most caves and at some springs by precipitation of crystals from water. Pure travertine is white. The colors seen in the travertine shown above are from iron oxides. Travertine speleothem occurs in a wide variety of forms. The most common variety of travertine speleothem is dripstone, which forms by the action of dripping water. Draperies are subplanar to wrinkled curtains of travertine dripstone, formed as water drips descend along a slanted cave ceiling or wall. The drapery shown above is an excellent example of "cave bacon" - it is translucent when backlit and shows bands of iron oxide impurities, reminiscent of bacon.

Shenandoah Caverns is developed in structurally tilted carbonates of the Conococheague Formation (Upper Cambrian).

Locality: Shenandoah Caverns, Quicksburg, southern Shenandoah County, northern Virginia, USA
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Source https://www.flickr.com/photos/47445767@N05/27778969842/
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/27778969842. It was reviewed on 22 February 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

22 February 2023

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