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Here is a nice piece of Jurassic fossil dinosaur bone, from the world-famous Bone Cabin Quarry in Wyoming. It lived about 150 million years ago, in what today is called the Morrison Formation.
It is a piece of a Stegosaurus bone, measuring about 0.90" (22.8 mm) using calipers. We don't know exactly what bone this was a part of, but it came from a group of Stegosaurus bones that were close together, including a full back plate, so we do know the species. Excavated in September 2020.
No paint or restoration has been applied. I would strongly suggest keeping the specimen dry, and displayed out of reach of many hands.
Stegosaurus is one of the most popular dinosaurs in the world. It was a plant eater that could grow up to 30 feet in length. It is immediately recognized by the 2 columns of large plates on its back which stood up vertically, and 4 large spikes on its tail. The spikes probably made a decent defense against predators. It probably did not outwit its enemies, as its brain (yes, it had just one brain) was about the size of a walnut.
Popular as Stegosaurus is, it is a pretty rare event to find a fossil Stegosaurus.
As fascinating as the Stegosaurus was and is, that is only part of the story here. The Bone Cabin Quarry got its name because of its proximity to the famed Bone Cabin. We are going to quote Wikipedia here:
"Bone Cabin Quarry is a dinosaur quarry that lies approximately fifty-five miles northwest of Laramie, Wyoming near historic Como Bluff. During the summer of 1897 Walter Granger, a paleontologist from the American Museum of Natural History, came upon a hillside littered with Jurassic period dinosaur bone fragments. Nearby was a sheepherder's cabin built entirely out of fossil bones, hence the name "Bone Cabin Quarry."
After Granger's discovery in late August 1897, the quarry was kept secret until the summer of 1898, when the manpower could be amassed to undertake a full-scale excavation. Bone Cabin Quarry was excavated from 1898 until 1905, when the productivity of specimens thinned.
Today, qualified, licensed diggers are excavating again.
The true genus Stegosaurus has only been found in the western US and is a very uncommon find, with a couple also in Portugal and China (see Mindat map). Stegosaurus is a member of the family Stegosauridae, which of course includes Stegosaurus, but also a number of other genus members. For example, multiple Portland Stegosaurs have been found in the UK. They are similar to Stegosaurus (same family) but they are not Stegosaurus.
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We are happy to enclose a COA (Certificate of
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nice-looking COA’s, some that are wrong, mis-describing a specimen.
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