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Hagerman Fossil Beds National Monument is a Pliocene-age site near Hagerman, Idaho.The 4,351-acre (17.61 km 2) Monument is internationally significant because it protects one of the richest known fossil deposits from the Blancan North American Land Mammal Age. [3]
The red sandstone bed, which stratigraphically underlies the white sandstone bed, also contains fossil material. The Smithsonian Institution excavated the majority of the Hagerman horse fossils from this bed during the 1930s. The taphonomic evidence of this bed indicates that a mass mortality of Equus simplicidens was the result of an earlier ...
Equus simplicidens, also known as the Hagerman horse and American zebra, is an extinct species of equine native to North America during the Pliocene and Early Pleistocene. [1] It is one of the oldest and most primitive members of the genus Equus .
Hagerman is a city in Gooding County, Idaho, United States. The population was 872 at the 2010 census, up from 656 in 2000. [4] The area is noted for its fossil beds and the Thousand Springs of the Eastern Snake Plain Aquifer. [5]
Outcrops of the formation in Hagerman Fossil Beds National Monument preserve the remains of seven fish species, five of which are extinct. These include the teleosteans Mylopharodon hagermanensis , Sigmopharyngodon idahoensis , and Ptychocheilus oregonensis , Ameirurus vespertinus , and the sunfish Archoplites taylori . [ 1 ]
The fossil record of Idaho spans much of the geologic column from the Precambrian onward. [1] During the Precambrian, bacteria formed stromatolites while worms left behind trace fossils. The state was mostly covered by a shallow sea during the majority of the Paleozoic era. This sea became home to creatures like brachiopods, corals and trilobites.
Mounted skeleton of Hagerman horse (Equus simplicidens) Plesippus is often considered an intermediate stage between Dinohippus and the extant genus, Equus. The famous fossils found near Hagerman, Idaho, were originally thought to be a part of the genus Plesippus. Hagerman Fossil Beds (Idaho) is a Pliocene
Lontra weiri (Weir's otter) is a fossil species in the carnivoran family Mustelidae from the Hagerman Fossil Beds of Idaho. It shared its habitat with Satherium piscinarium, a probable ancestor of the giant otter of South America. [1] It is named in honor of musician Bob Weir, and is the oldest known member of its genus. [2]