John Cancalosi / Cross-Section of Utah Septarian Nodule, Utah. A type of geode, Utah Septarian Nodules are found about 15 miles east of Zion National park. They were formed in an ancient sea floor during the Cretaceou...
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Philippe Clement / Geode, geological secondary formation within sedimentary and volcanic rock. Geodes are hollow, vaguely circular rocks showing minerals / crystals
