Sand dunes. View of desert sand dunes with narrowleaf cottonwood trees,Populus augustifolia,in the foreground. Dunes are hills of loose sand which form in areas where there is a strong prevailing wind. The movement of grains of sand due to the wind causes the dunes to migrate across land. Sand dunes have a characteristic shape with the side facing the prevailing wind being longer and less steep than the side opposite. Photographed in Great Sand Dunes National Monument,Colorado,USA | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Ervin, William |
Taille de l’image : | 3758 px × 2615 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |