Wave ripple marks in the sandstone at Dinosaur Ridge, Morrison, Colorado, USA. The ripple marks were left 100 million years ago when the area was a beach. Visitors can see hundreds of dinosaur footprints along the ridge, just west of Denver, Colorado, USA. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / West, Jim |
Taille de l’image : | 6720 px × 4480 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |