File:Coquina (Anastasia Formation, Quaternary; St. Augustine, Florida, USA) 1 (49136182942).jpg
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Summary[edit]
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| Description |
Coquina from the Quaternary of Florida, USA This is a distinctive variety of fossiliferous limestone called coquina. It is composed of finely-busted up seashells, typically clam shells & snail shells (bivalves & gastropods). Coquinas have high porosity - a significant amount of empty space exists between the grains. This results in coquina having a spongy appearance. Many samples are mixed with quartzose sand. Coquina had military significance in early American history. Some military forts in Florida were constructed with coquina walls. The coquina essentially absorbed any cannonballs that were shot at the walls. Stratigraphy: Anastasia Formation, Upper Pleistocene to Holocene Locality: unrecorded/undisclosed site at or near St. Augustine, northern part of the Atlantic Coast of Florida, USA |
| Date | |
| Source | Coquina (Anastasia Formation, Quaternary; St. Augustine, Florida, USA) 1 |
| 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@N05/49136182942 (archive). It was reviewed on 28 November 2019 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 | 18:29, 28 November 2019 | | 2,767 × 2,432 (4.53 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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