Frickin’ huge! Recently a whole fossil forest was discovered in eastern Illinois in an underground coal deposit. According to the Smithsonian, a four-mile swath of forest-land suddenly sunk 15 to 30 feet, was filled in with sand and mud and fossilized over the next 300 million years. And in October 2008, Cosmos ran an article that says the world’s largest fossil may be a coral reef the size of the Great Barrier Reef that sunk to up to 70 meters deep and may extend 700 to 800 kilometers.
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