The Giant Geode of Pulpi is 25 feet long. Now Scientists Know How it Formed

Posted on Categories Discover Magazine

(Credit: Hector Garrido)

From one end to another, this giant geode is about as long as a small RV. If you wanted, you could comfortably house several adults within its dazzling interior. And the crystalline slabs that jut from its walls may even be taller than you are.

However you slice it, the geode of Pulpí is absolutely gigantic. The interior of the egg-shaped cavity — which measures 25 feet long, 7 feet wide and about 5 feet tall — is encrusted with shimmering crystals. These crystal

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