File:Coquina 2.jpg
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| Description |
English: Coquina is a distinctive variety of fossiliferous limestone. It's composed of finely-busted up seashells, typically clam shells and snail shells (bivalves and gastropods). Coquinas have high porosity - a significant amount of empty space between the grains. This results in coquina having a somewhat spongy appearance. Coquinas are composed of calcite (CaCO3), as are all limestones, and they bubble in acid.
Coquina had military significance in early American history. Some military forts in Florida were constructed with coquina walls. The coquina “sucked up” cannonballs that were shot at the fort. Coquina is a fairly common sedimentary rock in the Quaternary of southeastern America (e.g., Florida). Stratigraphy: unrecorded, but possibly the Anastasia Formation, Upper Pleistocene to lower Holocene Locality: unrecorded, but possibly Florida, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/51161575629/ |
| Author | James St. John |
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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/51161575629. It was reviewed on 6 May 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:17, 6 May 2021 | | 3,643 × 2,301 (5.97 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51161575629/ with UploadWizard |
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