Judith River Formation

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The Judith River Formation is a fossil-bearing geologic formation in northern Montana, and is part of the Judith River Group. It dates to the upper Cretaceous. It is an historically important formation, explored by early American paleontologists such as Edward Drinker Cope, who named several dinosaurs from scrappy remains found here on his 1876 expedition (such as Monoclonius). Modern work has found nearly complete skeletons of the hadrosaurid Brachylophosaurus

[edit] Life forms

[edit] Dinosaurs

Ornithischia (Ryan and Evans, 2005)

Ceratopsia

Ceratopsidae

• Avaceratops lammersi

Centrosaurinae (long nose horn, short brow horns, short spiky frill)

• Albertaceratops nesmoi
• Monoclonius crassus

Ornithopoda

Hadrosauridae

Hadrosaurinae

• Brachylophosaurus canadensis

Lambeosaurinae

• ?Lambeosaurus paucidens