Weathering and erosion. View of part of Bryce Canyon,showing the pinnacles formed by many millennia of erosion and weathering. The canyon was formed by the erosive power of a river,cutting into the rock as it was uplifted. The exposed rock faces and internal faults were then weathered,creating these bizarre pinnacles. The main weathering process was 'freeze-thaw'. Water from occasional rain or dew found its way into cracks in the rock. When the water froze,it expanded and broke parts of the rock away. After a thaw,the water could find its way into other cracks. The canyon is largely made of banded sandstone sediments,and is in Utah,USA | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Fraser, Simon |
Taille de l’image : | 4878 px × 3661 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |