Deformation structure in schist. Polarised light micrograph of quartz (multicoloured) surrounding a ball of pyrite (brown) in schistose rock (grey). The quartz was formed by intense pressure that acted on the schist. The pressure was a shear force,which caused the pyrite sphere to roll through the schist,changing it into quartz | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 4848 px × 3648 px |
Model Release : | Non requis |
Property Release : | Non requis |
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