Bearpaw Formation

Contact (red arrow) between the underlying marine shales of the Bearpaw Formation and the coastal Horseshoe Canyon Formation.
Bearpaw shale being excavated to recover ammonites for ammolite production.
A specimen of Placenticeras ammolite from the Bearpaw Formation.

Geologic formation of Late Cretaceous age.

- Bearpaw Formation

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Dinosaur Park Formation

Uppermost member of the Belly River Group , a major geologic unit in southern Alberta.

Dinosaur Park Formation exposed along the Red Deer River in Dinosaur Provincial Park, southeastern Alberta, Canada.
Restoration of the megafaunal dinosaurs of the Dinosaur Park Formation. From left to right: Chasmosaurus, Lambeosaurus, Styracosaurus, Scolosaurus, Prosaurolophus, Panoplosaurus, and a herd of Styracosaurus in the background

It was deposited in alluvial and coastal plain environments, and it is bounded by the nonmarine Oldman Formation below it and the marine Bearpaw Formation above it.

Bears Paw Mountains

Insular-montane island range in the Central Montana Alkalic Province in north-central Montana, United States, located approximately 10 miles south of Havre, Montana.

McCann Butte in the Bearpaws, view to the west across glacial moraine. 1920 USGS photograph.
Bearpaw Mountains. View south near Clear Creek, Blaine County, Montana. July 31, 1920.

The Cretaceous Bearpaw Formation outcrops in these mountains, and is named for the range.

Judith River Formation

Fossil-bearing geologic formation in Montana, and is part of the Judith River Group.

"Leonardo," a rare intact mummified Brachylophosaurus canadensis uncovered in the Judith River Formation.

It is overlain by the Bearpaw Formation.

Pierre Shale

Geologic formation or series in the Upper Cretaceous which occurs east of the Rocky Mountains in the Great Plains, from Pembina Valley in Canada to New Mexico.

A broken concretion with fossils inside; Late Cretaceous Pierre Shale near Ekalaka, Montana

It is correlative with other marine shales that occur farther west, such as the Bearpaw Shale, Mancos Shale and the Lewis Shale.


One of the thirteen provinces and territories of Canada.

A topographic map of Alberta, showing cities, towns, municipal district (county) and rural municipality borders, and natural features
Moraine Lake at Banff National Park. The Alberta Mountain forests makes up the southwestern boundary of Alberta.
Köppen climate types in Alberta
Southeastern Alberta features a semi-arid steppe climate.
The wild rose is the provincial flower of Alberta.
A bighorn sheep in Kananaskis Country. The bighorn sheep is the provincial mammal of Alberta.
Specimens at the Royal Tyrrell Museum of Palaeontology, located in the Horseshoe Canyon Formation at Dinosaur Provincial Park. Some of the specimens, from left to right, are Hypacrosaurus, Edmontosaurus, Lambeosaurus, Gorgosaurus (both in the background), Tyrannosaurus, and Triceratops.
Blackfoot Confederacy warriors in Macleod in 1907
Fort Chipewyan, a trading post and regional headquarters for the Hudson's Bay Company in 1820
Downtown Calgary was one of several areas afflicted during the 2013 Alberta floods.
Population density of Alberta
Petroleum resources in Alberta
Cows in Rocky View. Nearly one-half of Canadian beef is produced in Alberta.
A canola field in Alberta
The Three Sisters at Bow Valley Provincial Park in Canmore
Bronco riding at the Calgary Stampede. The event is one of the world's largest rodeos
Distribution of Alberta's 6 specialized municipalities (red) and 74 rural municipalities, which include municipal districts (often named as counties) (orange), improvement districts (dark green) and special areas (light green) (2020)
The Alberta Legislative Building serves as the meeting place for the Legislative Assembly of Alberta.
Royal Canadian Mounted Police officers in St. Albert. The RCMP provides municipal policing throughout most of Alberta.
The University of Alberta in 2005. The institution is the oldest, and largest university in Alberta.
Foothills Medical Centre in Calgary is the largest hospital in Alberta.
Calgary International Airport, the province's largest airport by passenger traffic.
A Via Rail passenger train passing by freight trains in the background, at Jasper station
Highway 1 (the Trans-Canada Highway) at Alberta Highway 22 (Cowboy Trail).

The Bearpaw Formation represents strata deposited during a marine transgression.

Belly River Group

Stratigraphical unit of Late Cretaceous age in the Western Canadian Sedimentary Basin.

Belly River beds exposed along the Oldman River

The Belly River Group is conformably overlain by the Bearpaw Formation and gradually overlies the Wapiabi Formation, the Colorado Group shale or the Lea Park Formation shale.

Fox Hills Formation

Cretaceous geologic formation in the northwestern Great Plains of North America.

A ridge capped by a sandstone bed of the Fox Hills Formation west of Limon, Colorado

In its eastern extents, the formation is underlain by the marine Pierre Shale in the United States and by the equivalent Bearpaw Formation in Canada, while in western ranges in Montana and Wyoming it overlies the Lewis Shale.


Extinct genus of polycotylid plesiosaur from the Late Cretaceous of North America, containing three species, D. osborni, D. bonneri and D. tropicensis, as well as a questionably referred fourth species, D. herschelensis.

Mounted skeleton of the holotype of D. osborni (from Williston, 1903), in the University of Kansas Museum of Natural History
Restoration of D. osborni
With a human to scale
Dolichorhynchops (Trinacromerum) bonneri in the Rocky Mountain Dinosaur Resource Center in Woodland Park, Colorado
Specimen in Vienna

It was discovered in the Bearpaw Formation of Saskatchewan, Canada, a Late Cretaceous (late Campanian to Maastrichtian) rock formation.


Extinct genus of marine lizard belonging to the mosasaur family.

Restoration of P. lutugini.
Skull of P. saturator.
A close-up image of the teeth of P. solvayi.
Torso of P. saturator.
Fibrous tissues and microstructures recovered from the humerus of IRSNB 1624, an exceptionally well-preserved specimen of Prognathodon.
Skull of Prognathodon solvayi, the type species of the genus.
P. currii skull cast at the Geological Museum in Copenhagen.
Skull of P. overtoni.
A side-by-side comparison of a typical "crushing" mosasaur tooth (left, Igdamanosaurus) and a typical "cutting" mosasaur tooth (right, Mosasaurus). Teeth of Prognathodon seem to contain characteristics of both.
Restoration of P. saturator.
Restoration of P. overtoni
P. kianda skeleton at the Smithsonian Museum
Restoration of P. solvayi
Restoration of P. waiparensis

74.5 Ma) Bearpaw Formation in Alberta, Canada provided the first fully articulated skeletons of the genus.

St. Mary River Formation

Geologic formation of Late Cretaceous age of the Western Canada Sedimentary Basin in southwestern Alberta and northwesternmost Montana.

Strata of the St. Mary River Formation at the St. Mary Reservoir spillway.

The St. Mary River Formation conformably overlies the Blood Reserve Sandstone, or the Bearpaw Formation where the Blood Reserve Sandstone is absent, and it is conformably overlain by the Willow Creek Formation.