On October 1, 2008, the new monograph on the Pipestone Creek dinosaur was officially launched at Grande Prairie Regional College:

Philip Currie, Wann Langston, Darren Tanke: A New Horned Dinosaur from an Upper Cretaceous Bone Bed in Alberta (published by National Research Council Canada and available at their website).

Read the press releases here.
 

The Pachyrhinosaurus was an Ornithischian dinosaur, belonging to the larger group of Ceratopsians, (horned, herbivorous dinosaurs). It lived in the late Cretaceous of North America, about 72-68 million years ago.

The Pachyrhinosaurus was a fairly large animal (like the present day rhinoceros), reaching up to 23 feet in length. As its name suggests, it had a thick (pachy) bony knob on its nose (rhino) rather than a horn. Its relatively broad skull had a short crest or frill on the back. The beak was narrow.

Pachyrhinosaurus remains are known from the North slopes of Alaska, from Southern Alberta, and most importantly from the Pipestone Creek Bonebed site close to the city of Grande Prairie
in Northwest Alberta.

Al Lakusta found the bonebed along Pipestone Creek in 1972. The Pipestone Creek site was excavated by the Royal Tyrrell Museum during the summers of 1986-89. It has extreme significance, because of the density of disarticulated skeletons. The bonebed contains up to 100 bones per square  meter.  3500 bones, including 14 skulls have been removed from the site. Apparently, the site resulted from a mass mortality event. It is thought that Pachyrhinosaurus herds migrated seasonally, following the availability of plant food resources. During the migration our herd crossed a river in flood. The animals may have panicked and similarly to the mass mortality of the Quebec caribou herd in the early 1980’s, the dinosaurs perished in the flood.
Their carcasses were washed downriver and over time were ravaged by carnivors and became disarticulated. Shed teeth prove the fact, that before the remains finally were buried, predators had lots of opportunity to feed on them.

Five composite skeletons were created for the ExTerra project, and one for the Royal Tyrrell Museum. One of these skeletons is now on display at the Grande Prairie Regional College
main hall.

The Pipestone Creek site indicates that the herd contained animals from juveniles to fully grown ones, indicating they cared for their young.  Because of the abundance of the skulls, it could be established that some specimens had a convex nasal boss, while others a concave nasal boss.  Also, these specimens had a unicorn horn in the middle of the parietal bar over the eyes.
In 2008 Dr. Philip Currie, Dr. Wann Langstone and Darren Tanke described the Pipestone Creek Pachyrhinosaurus as a new species. (Currie, P. J., Langston Jr., W., and Tanke, D. H. (2008). A New Horned Dinosaur from an Upper Cretaceous Bone Bed in Alberta. Ottawa: NRC Research Press)