Eroded volcanic rocks. View of an eroded rhyolitic formation on the summit of Glyder Fach mountain. The rhyolitic rocks consist of several types of pyroclastic material ejected from a volcano,including agglomerates (breccias),tuffs and some intrusions. The rocks have been broken up first by tectonic forces as the ground was uplifted to form a mountain during the Caledonian orogeny and later by frost shattering during the Pleistocene ice age. The slabs of rock are resistant to erosion by wind and rain in the current climate,causing them to project from the ground as the surrounding area is worn away. Photographed in the Snowdonia National Park in Wales,Britain | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Bond, Martin |
Taille de l’image : | 3844 px × 4724 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |