Sheldon J
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From and more photos and story at https://www.geologyin.com/2018/12/gemstone-turns-out-to-be-fossil-of.html?fbclid=IwAR0DlOSFVbPFDyrM75KNr5jBfa5fH9QR92kAR5SL7uKsOLQVmhv-sxdTWeM
Gemstone Turns Out to Be Fossil of an Unknown Dinosaur
A new kelpie-sized dinosaur has been identified in the Lightning Ridge opal fields, 100 million years after it roamed prehistoric floodplains.
A new dinosaur has been added to the more than 700 already named after a chance discovery of a jawbone fragment in a bucket of opal rubble from near Lightning Ridge, New South Wales.
The kelpie-sized reptile, which lived in the Cretaceous Period about 100 million years ago, has been dubbed Weewarrasaurus pobeni — a name that recognises the fossil’s unearthing in the Wee Warra opal field, and honours Mike Poben, an Adelaide-based opal buyer who donated the specimen for research.
Lightning Ridge is the only place in the world where dinosaur bones routinely turn to opal.