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This image is a reconstruction of a paleocommunity based on a recently described fossil assemblage from the Wapiti Formation at Kleskun Hill Park, near Grande Prairie, Alberta, Canada (Fanti and Miyashita, 2009). The scene is a wide-angle view of a large bend in a slow-flowing river from the Campanian Late Cretaceous (about 74 million year ago). It represents the northernmost dinosaur nesting site ( Hypacrosaurus stebingeri) known in North America. The great number of Troodon teeth recovered, along with the abundance of Hypacrosaurus hatchling-to-nestling material supports the hypothesis that the theropod hunted young hadrosaurs. In the image, a pair of Hypacrosarus hatchlings (left and center) wander a short distance from their nesting colony (far right) near the banks of the river. A tyrannosaurid prowls the bald cypress forest (right center).
Fanti, F. and Miyashita, T. 2009. A high latitude vertebrate fossil assemblage from the Late Cretaceous of west-central Alberta, Canada: evidence for dinosaur nesting and vertebrate latitudinal gradient. Palaeogeography, Palaeoclimatology, Palaeoecology. 275:37-53.