File:Septarian nodule arp.jpg

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English: 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.
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Author Adrian Pingstone (Arpingstone)

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Public domain This work has been released into the public domain by its author, Arpingstone. This applies worldwide.

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Arpingstone grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

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current22:52, 26 January 2008Thumbnail for version as of 22:52, 26 January 20081,703 × 1,447 (2.71 MB)Arpingstone (talk | contribs)Septarian nodule

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