The Glenns Ferry Formation is a

Pliocene The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58Hagerman Fossil Beds National Monument Hagerman Fossil Beds National Monument near Hagerman, Idaho, contains the largest concentration of Hagerman horse fossils in North America. The fossil horses for which the monument is famous have been found in only one locale in the northern por ...

preserve the remains of seven fish species, five of which are extinct. These include the

teleosteans Teleostei (; Ancient Greek, Greek ''teleios'' "complete" + ''osteon'' "bone"), members of which are known as teleosts ), is, by far, the largest class (biology), infraclass in the class Actinopterygii, the ray-finned fishes, containing 96% of a ...

'' Mylopharodon hagermanensis'', '' Sigmopharyngodon idahoensis'', and ''

Ptychocheilus oregonensis The Northern pikeminnow, Columbia River dace or formerly Squawfish (''Ptychocheilus oregonensis'') is a large member of the minnow family, Leuciscidae. This predatory freshwater fish is native to northwestern North America, ranging from the Nass ...

'', '' Ameirurus vespertinus'', and the sunfish '' Archoplites taylori''. A nearly complete skull of the catfish '' Ameirurus vespertinus'' was recovered in

2001 The September 11 attacks against the United States by Al-Qaeda, which Casualties of the September 11 attacks, killed 2,977 people and instigated the global war on terror, were a defining event of 2001. The United States led a Participants in ...

from the wall of the Smithsonian Horse Quarry.

Footnotes

References

*Hunt, ReBecca K., Vincent L. Santucci and Jason Kenworthy. 2006. "A preliminary inventory of fossil fish from National Park Service units." in S.G. Lucas, J.A. Spielmann, P.M. Hester, J.P. Kenworthy, and V.L. Santucci (ed.s), Fossils from Federal Lands.

New Mexico Museum of Natural History and Science The New Mexico Museum of Natural History and Science is a natural history and science museum in Albuquerque, New Mexico near Old Town Albuquerque. The Museum was founded in 1986. It operates as a public revenue facility of the New Mexico Departmen ...

Bulletin 34, pp. 63–69. Geologic formations of Idaho Neogene Idaho Pliocene United States Pliocene paleontological sites of North America {{US-geologic-formation-stub