Pachyrhinosaurus is an extinct genus of centrosaurine ceratopsid dinosaur from the Late Cretaceous period of North America. The first examples were discovered by Charles M. Sternberg in Alberta, Canada, in 1946, and named in 1950. From Wikipedia
Researchers in Alberta are investigating a catastrophic flood that preserved a Pachyrhinosaurus herd 72 million years ago, offering new insights into herd dynamics and paleoecology.
