Geodes are more or less round, lump-like nodules in rocks that can be more or less hollow inside. They are mostly remnants of gas bubbles left behind

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Geodes are more or less round, lump-like nodules in rocks that can be more or less hollow inside. They are mostly remnants of gas bubbles left behind in lava after solidification. With time these may become partly or entirely filled with mineral precipitates, often chalcedony and/or crystals, most often quartz. Upon erosion of the host rock, the geode, being of harder substance, often comes out whole. When broken or cut open attractive scenery of crystals or agate become exposed. The geode here seen measures 30 cm across and is from Marrakech, Morocco.

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

Keywords: -, agate, bubble, crystals, earth, erosion, gas-bubble, geode, geological, geology, hollow, host-rock, infill, lump-, precipitate, precipitation, quartz, rock, sciences, solidification, south-morocco