Royal Tyrrell Museum of Palaeontology
"Coronosaurus" is known from two bone beds, BB 138 and MRR BB, located in the upper unit of the Oldman Formation, of the Belly River Group, excavated by Philip Currie between 1996 and 2000. Most of the ceratopsid material, if not all, from BB 138 in Dinosaur Provincial Park, Alberta, and the MRR BB near Warner, Alberta, was referred to "C. brinkmani". Bone bed 138 is located approximately from Brooks, Alberta, in the Oldman Formation and below the contact with the Dinosaur Park Formation. The MRR BB located approximately southwest of BB 138, is also from the Oldman Formation. These bone beds date to the middle Campanian stage of the Late Cretaceous period. Both the specimens and the precise localities are archived at the Royal Tyrrell Museum of Palaeontology, in Drumheller, Alberta.