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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Ervin, William |
Bildgröße: | 3758 px × 2615 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |