Pass Peak Formation

The Pass Peak Formation is a Wasatchian geologic formation in Wyoming. It preserves fossils dating back to the Ypresian stage of the Eocene period.

Fossil content

The following fossils have been found in the formation:

Mammals

;Artiodactyls

Diacodexis sp.

;Erinaceomorpha

Diacodon celatus

;Glires

Paramys copei

;Macroscelidea

Adapisoricidae indet.

;Perissodactyla

Hyracotherium cf. vasacciense

;Placentalia

''Hyopsodus cf. wortmani''
Wasatchian correlations