USA, Hell Creek Formation, North Dakota, Late Cretaceous, Maastrichtian period, ca. 72.1 to 66 million years ago. A large vertebra from one of the most famous and charismatic of the dinosaurs. The Triceratops (Triceratops horridus) had three distinctive facial horns and a frill-like fan on the back of the head. In life, these animals grew to over twenty feet long and could weigh over 10,000 pounds. Their remains have been found throughout the Rocky Mountains from Alberta to Colorado; this particular example comes from private land near one of the most famous and fossil-dense find areas known from the Cretaceous period, the Hell Creek Formation, composed of various clays, mudstones, and sandstones. Here, over fifty unique Triceratops specimens have been found, alongside other famous dinosaurs like Tyrannosaurus. Size: 13.2" W x 16.5" H (33.5 cm x 41.9 cm); 17.3" H (43.9 cm) on included custom stand.
This specimen nicely shows the pleurocoel, hollow depressions on the lateral portions of vertebrae that decreased the weight of the bones in life without sacrificing strength. Paleontologists believe that they were filled with air sacs, and that, altogether in a full spinal column, may have reduced the weight of the animal by almost a ton!
Provenance: ex-private Arizona, USA collection, found on a ranch in North Dakota
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#139142
Condition
Loss to parts of the processes, as shown. Extensive surface wear commensurate with fossilization and extraction processes. The piece has been stabilized, and the three processes have been reattached; repairs are well done and difficult to see.