Devils Tower National Monument,Wyoming,USA. This basalt tower rises almost 300 metres above a plain. It was formed by the cooling of a plug of underground magma produced by a volcano around 60 million years ago. Erosion of the softer surrounding soil and rock over the centuries slowly exposed the hard rock,causing it to project above the surface | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / West, Jim |
Bildgröße: | 5125 px × 3417 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |