Crystal geode. Palaeontologist holding a geode found in a rock on a sea-shore. A geode is a concretion, an irregular or ball-shaped object created whe

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Crystal geode. Palaeontologist holding a geode found in a rock on a sea-shore. 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. Here the geode formed from a cavity left by a fossilised ball of algae.

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Size: 3744px × 5616px
Photo credit: © PASCAL GOETGHELUCK/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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