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Septarian nodule

Septarian nodule

C012/5052

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Credit

DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY

Caption

Septarian nodule. This is a round mineral deposit of claystone (grey) filled with cracks formed when the claystone dried up. These cracks fill with other minerals, often calcite, a form of calcium carbonate. The variety of patterns that can form are often prized for their beauty. This specimen, from the Appenine mountains, Italy, measures 350 millimetres in diameter.

Release details

Model release not required. Property release not required.

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