Septarian nodule. Section through a septarian nodule,showing its inner structure. Septarin nodules are round mineral deposits of claystone (brown) filled with cracks formed when the claystone dried up. Claystone is a clastic sedimentary rock composed primarily of clay-sized particles. The cracks fill with other minerals,often calcite (calcium carbonate) forming a variety of patterns that are often prized for their beauty. This specimen is from Newcastle,UK | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 4998 px × 3567 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |