Hannold Hill Formation

The Hannold Hill Formation is an Early Eocene (Wasatchian) geologic unit in the western United States. It preserves the fossilized remains of the ray Myliobatis and gar.

Fossil content
The following fossils have been reported from the formation:
 * Glires
 * Paramys excavatus
 * Pantodonta
 * Caenolambda jepseni
 * Coryphodon armatus
 * Coryphodon sp.
 * Perissodactyla
 * Hyracotherium vasacciense
 * Minippus index
 * Placentalia
 * Hyopsodus cf. wortmani
 * Hyopsodus sp.
 * Phenacodus sp.
 * Primates
 * Phenacolemurinae indet.