Image:Septarian nodule arp.jpg
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Septarian nodule in Bristol City Museum, Bristol, England. This is a local concentration of calcite, forming a hard lump in mudstone. Radiating shrinkage cracks have filled with veins of calcite.
From the Middle Jurassic, Callovian Stage, Oxford clay, in Wiltshire, England.
Photographed by Adrian Pingstone in February 2006 and placed in the public domain.
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This image has been released into the public domain by its author, Arpingstone. This applies worldwide. In some countries this may not be legally possible; if so: العربية | Български | Deutsch | Ελληνικά | English | Español | Français | Italiano | 日本語 | 한국어 | Polski | Русский | Српски / Srpski | Svenska | தமிழ் | Українська | 中文(繁體) | 中文(简体) +/- |
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 22:52, 26 January 2008 | 1,703×1,447 (2.71 MB) | Arpingstone | (Septarian nodule) |
