Geologist Abel Ramirez hefts two pumice boulders. Because of the large number of air pockets,pumice is relatively light. Panum Crater,California | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / KEN M. JOHNS |
Taille de l’image : | 3828 px × 2550 px |
Model Release : | Disponible |
Property Release : | Non requis |
Restrictions : |
|