Slate quarry. Excavator moving rocks in a slate quarry. Slate,a metamorphic rock,is formed when a fine-grained sedimentary rock,such as mudstone,is subjected to high temperatures and pressures within the Earth's crust. This changes its crystal structure,and it forms a grey rock that can be split into thin,flat sheets. This property makes it a useful material for the construction industry for use as roof or wall coverings. Photographed near Machynnleth,Wales | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Marten, Michael |
Taille de l’image : | 4800 px × 3896 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |