The Scientific Name Equus Is Derived from the Latin Language and Means Horse

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The Scientific Name Equus Is Derived from the Latin Language and Means Horse

North Dakota Stratigraphy Equus ROCK ROCK UNIT COLUMN PERIOD EPOCH AGES MILLIONS OF YEARS AGO Common Name: Holocene Oahe .01 Ice Age horse Coleharbor Pleistocene QUATERNARY Classification: 1.8 Pliocene Unnamed 5 Miocene Class: Mammalia 25 Arikaree Order: Perissodactyla Family: Equidae Brule Oligocene 38 South Heart Chadron These Equus foot bones were found in McKenzie County in an Chalky Buttes Camels Butte Ice Age river channel by Chuck Monson on land administered by Eocene Golden 55 Valley Bear Den the U. S. Army Corps of Engineers within the Fort Berthold Reservation near New Town. Length 109 mm. Sentinel Butte TERTIARY Description: The scientific name Equus is derived from the Latin language and means horse. Horses have lived in North Dakota for at least 30 Bullion Paleocene Creek million years. The early horses, such as Mesohippus, where small animals about the size of sheep and had three toes on each foot. Slope They possessed low crowned teeth and were browsers. Equus Cannonball sp., similar to today’s horse, lived in North Dakota at the end of Ludlow the last Ice Age at least 50,000 years ago. They had one toe on 65 each foot and high crowned teeth adapted for eating grasses like Hell Creek today’s horse. Equus sp. ranged widely over North America at that the end of the Ice Age but became extinct in North America Fox Hills several thousand years ago. It is not known why they became extinct in North America. Horses were reintroduced into North ACEOUS America by the Spanish in the 1500s. Pierre CRET 84 Niobrara Carlile Carbonate Calcareous Shale Claystone/Shale Siltstone Sandstone Sand & Gravel Mudstone Lignite Glacial Drift The Ice Age horse, Equus. Painting by and courtesy of Dorothy S. Norton. Locations where fossils have been found ND State Fossil Collection Prehistoric Life of ND Map North Dakota Geological Survey Home Page.

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