Hand sample of Obsidian,an extrusive igneous rock with a glassy appearance formed by the rapid cooling of rhyolitic lavas | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Schneider, Mark A. |
Taille de l’image : | 4256 px × 2848 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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