Cut surface of Jurassic oolitic limestone
Bildnummer 11741389
| Oolitic limestone. Cut surface of oolitic lime- stone,a type of sedimentary rock derived from coral reefs. The numerous,round particles in this rock are "ooliths". These form in shallow tropical seas from fragments of shell that act as nuclei for the precipitation of dissolved calcium carbon- ate (CaCO3). Some of the shell nuclei can still be seen here. After growing to up to 2mm wide,ooliths fall into the layer of carbonate sand on the sea bed,and eventually become compacted into limestone rock. This 160 million year old sample from France was formed during the Jurassic period,when the dinosaurs were at their peak. Magnification x4 at 35mm size | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Bernard, George |
| Bildgröße: | 5121 px × 3461 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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