A thunder egg is a rock formation resembling a filled geode, created within layers of rhyolitic volcanic ash. One of the great things about thunder eggs is you don't know what treasures behold the egg until you crack it open. | CBS Sunday Morning
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A thunder egg is a rock formation resembling a filled geode, created …
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Millions of years ago, in what would one day become Eastern Oregon's Owyhee Canyonlands, lava and water merged to create thundereggs – sphere-shaped rock formations containing agate, jasper or opal. Correspondent Conor Knighton digs into the history of Oregon's state rock, whose beauty is most apparent when sliced open. https://cbsn.ws/3zFe35c | CBS Sunday Morning
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Millions of years ago, in what would one day become Eastern Oregon'…
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What is a thunderegg? What to know about Oregon's iconic state rock
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