Pass Peak Formation

Pass Peak Formation
Stratigraphic range: Ypresian (Wasatchian)
~55.8–50 Ma

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Pass Peak Formation; Stratigraphic range: Ypresian (Wasatchian); ~55.8–50 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Formation
Location
Coordinates	42°42′N 110°06′W / 42.7°N 110.1°WCoordinates: 42°42′N 110°06′W / 42.7°N 110.1°W
Approximate paleocoordinates	47°42′N 93°30′W / 47.7°N 93.5°W
Region	Wyoming
Country	United States
Extent	Green River Basin
	Pass Peak Formation (the United States)Show map of the United StatesShow map of WyomingShow all

The Pass Peak Formation is a Wasatchian geologic formation in Wyoming. It preserves fossils dating back to the Ypresian stage of the Eocene period.^[1]

Fossil content[]

The following fossils have been found in the formation:^[1]^[2]

Mammals[]

Artiodactyls

Diacodexis sp.

Erinaceomorpha

Glires

Paramys copei

Macroscelidea

Adapisoricidae indet.

Perissodactyla

Hyracotherium cf. vasacciense

Placentalia

Hyopsodus cf. wortmani

Wasatchian correlations[]

Wasatchian correlations in North America
Formation	Wasatch	DeBeque	Claron	Indian Meadows	Pass Peak	Tatman	Willwood	Golden Valley	Coldwater	Allenby			Margaret	Nanjemoy	Tetas de Cabra	Hannold Hill	Coalmont	Cuchara	Galisteo	San Jose	Ypresian (IUCS) • Itaboraian (SALMA) Bumbanian (ALMA) • Mangaorapan (NZ)
Basin	Powder River Uinta Piceance Colorado Plateau Wind River Green River Bighorn	Piceance	Colorado Plateau	Wind River	Green River	Bighorn		Williston	Okanagan							Rio Grande	North Park	Raton	Galisteo	San Juan	Pass Peak Formation (North America)
Country	United States								Canada					United States	Mexico	United States
Copelemur
Coryphodon
Diacodexis
Homogalax
Oxyaena
Paramys
Primates
Birds
Reptiles
Fish
Insects
Flora
Environments	Alluvial-fluvio-lacustrine	Fluvial				Fluvial	Fluvio-lacustrine	Fluvial	Lacustrine		Fluvio-lacustrine		Deltaic-paludal	Shallow marine	Fluvial	Shallow marine	Fluvial		Fluvial		Wasatchian volcanoclastics Wasatchian fauna Wasatchian flora
Volcanic	Yes	No							Yes	No	Yes	No	Yes	No					Yes	No