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Ash Hollow Formation
The Ash Hollow Formation of the Ogallala Group is a geological formation found in Nebraska and South Dakota. It preserves fossils dating back to the Neogene Period (geology), period. It was named after Ash Hollow, Nebraska and can be seen in Ash Hollow State Historical Park. Ashfall Fossil Beds State Historical Park is within this formation. Fossil content Mammals Bats Carnivorans Eulipotyphlans Lagomorphs Rodents Ungulates Proboscideans Reptiles Birds Crocodilians Squamates Testudines Amphibians Plants See also * List of fossiliferous stratigraphic units in South Dakota * Paleontology in South Dakota * List of fossiliferous stratigraphic units in Nebraska * Paleontology in Nebraska References * Neogene United States Neogene geology of Nebraska Neogene geology of South Dakota Neogene geology of Wyoming Lagerstätten {{SouthDakota-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nebraska
Nebraska () is a state in the Midwestern region of the United States. It is bordered by South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the southwest; and Wyoming to the west. It is the only triply landlocked U.S. state. Indigenous peoples, including Omaha, Missouria, Ponca, Pawnee, Otoe, and various branches of the Lakota (Sioux) tribes, lived in the region for thousands of years before European exploration. The state is crossed by many historic trails, including that of the Lewis and Clark Expedition. Nebraska's area is just over with a population of over 1.9 million. Its capital is Lincoln, and its largest city is Omaha, which is on the Missouri River. Nebraska was admitted into the United States in 1867, two years after the end of the American Civil War. The Nebraska Legislature is unlike any other American legislature in that it is unicameral, and its members a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ashfall Fossil Beds
The Ashfall Fossil Beds of Antelope County in northeastern Nebraska are rare fossil sites of the type called lagerstätten that, due to extraordinary local conditions, capture an ecological "snapshot" in time of a range of well-preserved fossilized organisms. Ash from a Yellowstone hotspot eruption 10-12 million years ago created these fossilized bone beds. The ash depth was up to 1 foot. The site is protected as Ashfall Fossil Beds State Historical Park, a park that includes a visitor center with interpretive displays and working fossil preparation laboratory, and a protected ongoing excavation site, the Hubbard Rhino Barn, featuring fossil ''Teleoceras'' (native hippo-like ancestral rhinoceros) and ancestral horses. The Ashfall Fossil Beds are especially famous for fossils of mammals from the middle Miocene geologic epoch. The Ashfall Fossil Beds are stratigraphically part of the Serravallian-age Ogallala Group. Bruneau-Jarbidge event The Ashfall deposit preserves the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barbourofelis
''Barbourofelis'' is an extinct genus of large, predatory, feliform carnivoran mammals of the family Barbourofelidae (false saber-tooth cats). The genus was endemic to North America and Eurasia during the Miocene until its extinction during the Tortonian, living from 13.6 to 7.3 Ma. Taxonomy ''Barbourofelis'' was named by Bertrand Schultz, Marian Schultz and Larry Martin (1970) in honor of Erwin Hinckley Barbour, who died a few days before the holotype was discovered. Its type is ''Barbourofelis fricki'' and is the type genus of the subfamily Barbourofelinae. It was reassigned to Hoplophoneinae by Flynn and Galiano (1982), then to Barbourofelidae by Bryant (1991), and to Nimravidae by Schultz, et al. (1970) and Martin (1998). Description While the species ''B. fricki'' is thought to have been a lion-sized predator, having a weight comparable to an African lion, with limb bones indicating a muscular, robust body, other species in the genus, such as ''B. morrisi'', are beli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aelurodon Taxoides
''Aelurodon'' is an extinct canid genus of the subfamily Borophaginae which lived from the Barstovian land mammal age () of the middle Miocene to the late Miocene epoch (). yu ''Aelurodon'' existed for approximately . Description ''Aelurodon'' are a part of a clade of loosely known as "bone-crushing" or "hyena-like" dogs, that apparently descended from the earlier genera '' Protomarctus'' and '' |
Borophaginae
The extinct Borophaginae form one of three subfamilies found within the canid family. The other two canid subfamilies are the extinct Hesperocyoninae and extant Caninae. Borophaginae, called "bone-crushing dogs", were endemic to North America during the Oligocene to Pliocene and lived roughly 34—2.5 million years ago, existing for about . Origin The Borophaginae descended from the subfamily Hesperocyoninae. The earliest and most primitive borophagine is the genus ''Archaeocyon'', which is a small fox-sized animal mostly found in the fossil beds in western North America. The borophagines soon diversified into several major groups. They evolved to become considerably larger than their predecessors, and filled a wide range of niches in late Cenozoic North America, from small omnivores to powerful, bear-sized carnivores, such as ''Epicyon''. Species There are 66 identified borophagine species, including 18 new ones that range from the Orellan to Blancan ages. A phylogenetic ana ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Banner County, Nebraska
Banner County is a county in the western part of the U.S. state of Nebraska in the Great Plains region of the United States. As of the 2010 United States Census, its population was 690. Its county seat is the unincorporated community of Harrisburg; there are no incorporated municipalities within the county. In the Nebraska license plate system, Banner County is represented by the prefix 85 (it had the eighty-fifth largest number of vehicles registered in the county when the license plate system was established in 1922). Banner County is part of the Scottsbluff, NE Micropolitan Statistical Area. History When Nebraska became a state in 1867, a single county encompassed the entire Panhandle.Nebraska Historic Buildings Survey—Banner County. Retrieved June 22, 2010. In 1870, the Panh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hitchcock County, Nebraska
Hitchcock County is a county in the U.S. state of Nebraska. As of the 2020 United States Census, the population was 2,616. Its county seat is Trenton. In the Nebraska license plate system, Hitchcock County is represented by the prefix 67 (it had the sixty-seventh-largest number of vehicles registered in the county when the license plate system was established in 1922). History Hitchcock County was formed in 1873. It was named for US Senator Phineas Warren Hitchcock. The Massacre Canyon battle between Sioux and Pawnee took place on August 5, 1873, at a spot three miles east of Trenton. Geography The terrain of Hitchcock County consists of rolling low hills. The flattened hilltops are used for agriculture; mostly dry farming with some center pivot irrigation. The Republican River flows eastward through the central part of the county. The county has a total area of , of which is land and (1.2%) is water. The eastern two-thirds of the state of Nebraska observes Central T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sheridan County, Nebraska
Sheridan County is a county in the U.S. state of Nebraska. As of the 2010 United States Census, the population was 5,469. Its county seat is Rushville. The county was formed in 1885, and was named for General Philip H. Sheridan. In the Nebraska license plate system, Sheridan County is represented by the prefix 61 (it had the sixty-first-largest number of vehicles registered in the state when the license plate system was established in 1922). Geography Sheridan County lies on the north line of Nebraska. Its north boundary line abuts the south boundary line of the state of South Dakota. An upper reach of the Niobrara River flows eastward through the upper central part of the county. The terrain consists of arid rolling hills, dotted with small lakes in the eastern and southern parts of the county. The county has a total area of , of which is land and (1.2%) is water. It is the fourth-largest county in Nebraska by area. Major highways * * Nebraska Highway 2 * Nebraska Hig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knox County, Nebraska
Knox County is a county in the U.S. state of Nebraska. As of the 2020 United States Census, the population was 8,391. Its county seat is Center. Knox County was named for Continental and U.S. Army Major General Henry Knox. In the Nebraska license plate system, Knox County is represented by the prefix 12 (it had the 12th-largest number of vehicles registered in the county when the license plate system was established in 1922). History Knox County was organized by the Territorial Legislature in 1857, and named L'Eau Qui Court, that being the French name for the river named by the Ponca Niobrara—both names meaning, in English, Running Water. The name was changed to Knox by a statute passed February 21, 1873, which took effect April 1, 1873. Geography Knox County lies along the north line of Nebraska. Its north boundary line abuts the south boundary line of the state of South Dakota. The terrain of the county consists of low rolling hills sloped to the northeast; most of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keya Paha County, Nebraska
Keya Paha County ( ) is a county in the U.S. state of Nebraska. As of the 2010 United States Census, the population was 824. Its county seat is Springview. In the Nebraska license plate system, Keya Paha County is represented by the prefix 82 (it had the 82nd-largest number of vehicles registered in the county when the license plate system was established in 1922). History The name "Keya Paha" is taken from the Dakota language; literally translated, it means "turtle hill". The Dakota name for a set of small hills was given to the county and to the Keya Paha River, which runs through it. All land north of the Keya Paha River (which includes a small portion of Keya Paha County and most of neighboring Boyd County) was not originally part of Nebraska at the time of statehood, but was transferred from Dakota Territory in 1882. Keya Paha County was organized in 1884 of land partitioned from Brown County. Geography Keya Paha County lies on the northern boundary of Nebraska, abu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cherry County, Nebraska
Cherry County is a county located in the U.S. state of Nebraska. As of the 2010 United States Census, the population was 5,713. Its county seat is Valentine. The county was named for Lt. Samuel A. Cherry, an Army officer who was stationed at Fort Niobrara and who had been killed in South Dakota in 1881. Cherry County is in the Nebraska Sandhills. It is the largest county in the state at nearly 6,000 square miles (15,500 sq km), larger than the state of Connecticut. In the Nebraska license plate system, Cherry County is represented by the prefix 66 (it had the 66th-largest number of vehicles registered in the state when the license plate system was established in 1922). Geography Cherry County lies on the north side of Nebraska. Its north boundary line abuts the south boundary line of the state of South Dakota. According to the US Census Bureau, the county has an area of , of which is land and (0.8%) is water. It is by far Nebraska's largest county in land area and larger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aelurodon
''Aelurodon'' is an extinct canid genus of the subfamily Borophaginae which lived from the Barstovian land mammal age () of the middle Miocene to the late Miocene epoch (). yu ''Aelurodon'' existed for approximately . Description ''Aelurodon'' are a part of a clade of loosely known as "bone-crushing" or "hyena-like" dogs, that apparently descended from the earlier genera '' Protomarctus'' and ''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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