Septarian nodule. Cut and polished interior of a septarian nodule. This is a round mineral deposit of claystone (grey) filled with cracks formed when the claystone dried up. These cracks (brown) fill with other minerals (white),often calcite,a form of calcium carbonate. The variety of patterns that can form are often prized for their beauty | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 3840 px × 4850 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |