A report on Bearpaw Formation and Belly River Group

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

The Bearpaw Formation conformably overlies the Dinosaur Park Formation of the Belly River Group in central Alberta, and the Judith River Formation in the plains to the east and Montana.

- Bearpaw Formation

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.

- Belly River Group
Contact (red arrow) between the underlying marine shales of the Bearpaw Formation and the coastal Horseshoe Canyon Formation.

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

Judith River Formation

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

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

It is overlain by the Bearpaw Formation.

It is equivalent to the Belly River Formation in the southern Canadian Rockies foothills, the Lea Park Formation in central Alberta and the Wapiti Formation in the northwestern plains.