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Gemstones, Minerals & Fossils
Fossils
Scientists stunned by find in Outback desert
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<blockquote data-quote="user 4386" data-source="post: 658281" data-attributes="member: 4386"><p>Yes, they went extinct 66 million years ago during the K-T extinction event that wiped out the dinosaurs. They are not really the original bones of the dinosaurs, but rock, which is why they survive. Original bones only survive for decades to a few million years at most. However as they dissolve (buried in rock) they leave cavities (moulds) that are infilled with mineral material, often silica (sometimes even precious opal).</p></blockquote><p></p>
[QUOTE="user 4386, post: 658281, member: 4386"] Yes, they went extinct 66 million years ago during the K-T extinction event that wiped out the dinosaurs. They are not really the original bones of the dinosaurs, but rock, which is why they survive. Original bones only survive for decades to a few million years at most. However as they dissolve (buried in rock) they leave cavities (moulds) that are infilled with mineral material, often silica (sometimes even precious opal). [/QUOTE]
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Gemstones, Minerals & Fossils
Fossils
Scientists stunned by find in Outback desert
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