Daspletosaurus
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Daspletosaurus is a genus of tyrannosaurid dinosaur that lived in Laramidia between about 78 and 74.4 million years ago, during the Late Cretaceous Period. The genus Daspletosaurus contains three named species. Fossils of the earlier type species, D. torosus, have been found in Alberta, while fossils of a later species, D. horneri, have been found only in Montana. D. wilsoni has been suggested as an intermediate species between D. torosus and D. horneri that evolved through anagenesis, but this theory has been disputed by other researchers.
The D. torosus holotype specimen mounted at the Canadian Museum of Nature.
Originally believed to be a specimen of Gorgosaurus, this skull was later sold to the Field Museum and is now reassigned to Daspletosaurus torosus
Dinosaur Park specimen (FMNH PR308), mounted at the Field Museum
Horseshoe Canyon Formation
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The Horseshoe Canyon Formation is a stratigraphic unit of the Western Canada Sedimentary Basin in southwestern Alberta. It takes its name from Horseshoe Canyon, an area of badlands near Drumheller.
Horseshoe Canyon Formation at Horsethief Canyon, near Drumheller. The dark bands are coal seams.
Contact (red arrow) between the underlying marine shales of the Bearpaw Formation and the coastal Horseshoe Canyon Formation. Coal beds (black bands) are common in the Horseshoe Canyon Formation and were formed in coastal swamps.
Edmontosaurus
Hypacrosaurus