State Fossils

Idaho

Equus simplicidens (horse, Neogene) (Figure 3.60).

Montana

Maiasaura peeblesorum (hadrosaur dinosaur; Cretaceous) (Maiasaura Box).

Nebraska

Mammuthus columbi (Columbian mammoth; Neogene) (Figure 3.49).

North Dakota

Teredo Petrified Wood (petrified wood; Paleocene) (Figure 3.37).

South Dakota

Triceratops horridus (ceratopsian dinosaur; Cretaceous) (Figure 3.34A).

Wyoming

Knightia eocaena (fish; Eocene) (Figure 3.57).