File:Beekite rings on surface of silicified solitary rugose coral (Devonian; Ohio, USA) (15182130416).jpg
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[edit]DescriptionBeekite rings on surface of silicified solitary rugose coral (Devonian; Ohio, USA) (15182130416).jpg |
Beekite rings on a the surface of a partial silicified solitary rugose coral (1.1 cm across) from the Devonian of Ohio, USA. The surface details of the coral have been almost completely destroyed. Classification: Animalia, Cnidaria, Anthozoa, Rugosa Replacement is a fossil preservation style involving the crystal structure and the mineral of an organism's hard parts being changed. The most common replacement mineral is quartz (silica) (SiO2) - fossils that have been replaced by quartz are said to be silicified (silicification). Many silicified fossils have rounded to pustulose structures covering their surfaces. These are called beekite rings, but they're composed of ordinary quartz. Other common replacment materials include the mineral pyrite (FeS2 - iron sulfide) and calcium phosphate. These replacement styles are called pyritization and phosphatization. Numerous other minerals have been found replacing minerals - many of them are quite rare. Reported fossil replacement minerals include: anglesite, apatite, barite, calamine, calcite, cassiterite, celestite, cerargyrite, cerussite, chalcocite, cinnabar, copper, dolomite, fluorite, galena, garnet, glauconite, gumbelite, gypsum, hematite, kaolinite, limonite, magnesite, malachite, marcasite, margarite, opal, pyrite, romanechite/psilomelane, siderite, silica/quartz, silver, smithsonite, specular hematite, sphalerite, sulfur, uranium minerals, and vivianite. (List mostly from info. in Hartzell, 1906 and Klein & Hurlbut, 1985) |
Date | |
Source | Beekite rings on surface of silicified solitary rugose coral (Devonian; Ohio, USA) |
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@N05/15182130416 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
7 December 2019
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current | 18:54, 7 December 2019 | ![]() | 1,313 × 1,045 (374 KB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 15:48, 18 October 2007 |
Color space | Uncalibrated |