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slate was quarried for hundreds of years and is still quarried today up to 38 feet in depth
but not the scales of the cone
Mene rhombea had a laterally compressed body
A definitive explanation for their mass extinction is yet to be agreed upon
Parasaurolophus walkeri, left lower jaw (juvenile) hadrosaur Pteranodon slate was quarried for hundredsParasaurolophus was a long crested, duck billed (hadrosaur) dinosaur. Its extremely long, backwards leaning, hollow, bony crest was as bigger than the rest of its skull and may have been used to produce a low frequency, foghorn like sound, enhance its sense of smell, and or used in courtship displays. The Parasaurolophus' nostrils (at the end of its snout) went up through the crest and back down it, forming four tubes. The crest was up to 6 feet (1. 8
US$ 13.00
US$ 41.77
US$ 172.00