Sample of shale. Shale is a dense sedimentary rock that forms when layers of mud are buried and compressed. Mud is largely composed of clay particles. When these are compacted the resulting layers can be readily separated along the clay particle surfaces | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Trevor Clifford Photography |
Taille de l’image : | 5125 px × 3431 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |