Septarian Nodule

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Septarian nodule from Ohio. The name septarian comes from many of the rocks having seven cracks. In these nodules the cracks are filled with calcite. Each specimen is about 5 cm across.
Septarian nodule from Ohio. The name septarian comes from many of the rocks having seven cracks. In these nodules the cracks are filled with calcite. Each specimen is about 5 cm across.
Filename: septarian-iron-nodule_0071.jpg
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