A geode is a concretion,an irregular or ball-shaped object created when minerals fill a cavity in rock. Geodes form in different ways in different rock types. Water percolating through rocks,for example,may deposit various minerals on the inside of cavities in the rocks. Quartz and calcite are the most common minerals that form geodes. Geodes may contain a variety of minerals,often in crystals,that formed before the water stopped flowing through the open space | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Arem, Joel |
Taille de l’image : | 3855 px × 2553 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
|