File:Watling's Well Banana Hole (San Salvador Island, Bahamas) 2 (16240672100).jpg
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| Description |
Watling's Well Banana Hole, just south of Sandy Point Manor House ("Watling's Castle"), southwestern San Salvador Island, eastern Bahamas. Banana holes are relatively small, relatively low caves having a subcircular shape in plan view. Traditionally, they are interpreted as phreatic dissolutional features that formed at the top of an ancient groundwater lens (at the water table), away from the margins of a carbonate island. Like flank margin caves, banana holes originally had no entrances to the surface. With erosional denudation of limestone bedrock surfaces, banana hole ceilings collapse, resulting in a cave entrance. Recent karst research has shown that banana holes are immature flank margin caves that started to develop at the margins of former fresh-groundwater lenses, where mixing with seawater occurred (see Myrloie et al., 2012). Freshwater-seawater mixing zone waters have high aggressivity, resulting in calcium carbonate dissolution and cave development. The banana hole shown above was modified during the mid- to late 1700s by the placement of a well for drinking water. Reference cited: Myrloie, J.E., J.L. Carew, H.A. Curran, F. Godefroid, P. Kindler & N.E. Sealey. 2012. Geology of New Providence Island, Bahamas: a Field Trip Guide. 58 pp. |
| Date | |
| Source | Watling's Well Banana Hole (San Salvador Island, Bahamas) 2 |
| Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/16240672100. It was reviewed on 2 March 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 21:11, 2 March 2015 | | 3,008 × 2,000 (2.16 MB) | Jacopo Werther (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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