Geologic concretion,Theodore Roosevelt National Park,North Dakota. A concretion is a clearly bound body of rock within generally softer enclosing sediments of the same composition | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Newman, Mark |
Taille de l’image : | 5103 px × 3407 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
|