bn:00463283n
Noun Concept
Categories: Cascadian folklore, Gemstones, Symbols of Oregon, Igneous rocks, Minerals
EN
thunderegg  Thunder egg  Thundereggs
EN
A thunderegg is a nodule-like rock, similar to a filled geode, that is formed within rhyolitic volcanic ash layers. Wikipedia
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EN
A thunderegg is a nodule-like rock, similar to a filled geode, that is formed within rhyolitic volcanic ash layers. Wikipedia
Nodule-like rock, that is formed within rhyolitic volcanic ash layers Wikidata
A roughly spherical, nodule-like geological structure, similar to a geode, that is formed within a rhyolitic lava flow. Wiktionary
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