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Ashfall
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 f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ashfall Fossil Beds - Baby Rhino "T
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 f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teleoceras
''Teleoceras'' (Greek: "perfect" (teleos), "horn" (keratos)) is an extinct genus of grazing rhinoceros. It lived in North America during the Miocene and Pliocene epochs during the Hemingfordian to the end of Hemphillian from around 17.5 to 4.9 million years ago. It grew up to lengths of 13 feet (4 meters long). Description ''Teleoceras'' had much shorter legs than modern rhinos, and a barrel chest, making its build more like that of a hippopotamus than a modern rhino. Based on this description, Henry Fairfield Osborn suggested in 1898 that it was semi-aquatic and hippo-like in habits. This idea persisted for about a century, but has recently been discounted by isotopic evidence. ''Teleoceras'' is now thought to have been a terrestrial grazer on C3 plants. ''Teleoceras'' had a single small nasal horn. Discovery ''Teleoceras'' is the most common fossil in the Ashfall Fossil Beds of Nebraska. In fact, its remains were so numerous and concentrated that the building housing the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yellowstone Hotspot
The Yellowstone hotspot is a volcanic hotspot in the United States responsible for large scale volcanism in Idaho, Montana, Nevada, Oregon, and Wyoming, formed as the North American tectonic plate moved over it. It formed the eastern Snake River Plain through a succession of caldera-forming eruptions. The resulting calderas include the Island Park Caldera, Henry's Fork Caldera, and the Bruneau-Jarbidge caldera. The hotspot currently lies under the Yellowstone Caldera. The hotspot's most recent caldera-forming supereruption, known as the Lava Creek Eruption, took place 640,000 years ago and created the Lava Creek Tuff, and the most recent Yellowstone Caldera. The Yellowstone hotspot is one of a few volcanic hotspots underlying the North American tectonic plate; another example is the Anahim hotspot. Snake River Plain The eastern Snake River Plain is a topographic depression that cuts across Basin and Range Mountain structures, more or less parallel to North American plate mot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael Voorhies
Michael Voorhies is a retired paleontologist and earth scientist whose career was affiliated with the University of Nebraska State Museum. He is best known for discovering the Ashfall Fossil Beds, a National Natural Landmark in Antelope County, Nebraska. Acreage within the site has been preserved as the Ashfall Fossil Beds State Historical Park. Discovery Voorhies stated that he and his wife Jane Voorhies discovered the site on a hike in 1971 when they caught sight, by chance, of a fossilized animal skull eroding out of a Verdigre Creek farm slope carved by water erosion. The skull proved to be part of a lagerstätten, a bonanza site of well-preserved remains from a group of life-forms fossilized at a single moment in time. Investigations showed that the a water-cut gully, part of an overall local pattern of agricultural erosion, had chipped down a layer of Nebraska sandstone caprock that had previously granted durable, multi-million-year protection to a bed of volcanic ash. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bruneau-Jarbidge Caldera
The Bruneau-Jarbidge caldera (sometimes called a supervolcano) is located in present-day southwest Idaho. The volcano erupted during the Miocene, between ten and twelve million years ago, spreading a thick blanket of ash in the Bruneau-Jarbidge event and forming a caldera. Animals were suffocated and burned in pyroclastic flows within a hundred miles of the event, and died of slow suffocation and starvation much farther away, notably at Ashfall Fossil Beds, located 1,000 miles downwind in northeastern Nebraska, where up to two meters of ash were deposited. At the time, the caldera was above the Yellowstone hotspot. By its uniquely characteristic chemical composition and the distinctive size and shape of its crystals and glass shards, the volcano stood out among dozens of prominent ashfall horizons laid down in the Cretaceous, Paleogene, and Neogene periods of central North America. The event responsible for this fall of volcanic ash was identified at Bruneau-Jarbidge, 1,600 kil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal, Nebraska
Royal is a village in Antelope County, Nebraska, United States. The population was 63 at the 2010 census. History The community was established in 1890 (or 1880), and was originally named "Savage". The community was renamed after Royal Thayer, who helped establish the post office. An unusual point in the town's history is the defunct "Zoo Nebraska", which was near Royal. After some chimpanzees escaped, and were killed, the zoo gained some national attention and then ultimately collapsed. In 2019 a book about the zoo and the incident was released. Geography Royal is located at (42.333688, −98.123833). According to the United States Census Bureau, the village has a total area of , all land. Demographics 2010 census At the 2010 census there were 63 people, 29 households, and 14 families living in the village. The population density was . There were 38 housing units at an average density of . The racial makeup of the village was 98.4% White and 1.6% from two or more races. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horse
The horse (''Equus ferus caballus'') is a domesticated, one-toed, hoofed mammal. It belongs to the taxonomic family Equidae and is one of two extant subspecies of ''Equus ferus''. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature, ''Eohippus'', into the large, single-toed animal of today. Humans began domesticating horses around 4000 BCE, and their domestication is believed to have been widespread by 3000 BCE. Horses in the subspecies ''caballus'' are domesticated, although some domesticated populations live in the wild as feral horses. These feral populations are not true wild horses, as this term is used to describe horses that have never been domesticated. There is an extensive, specialized vocabulary used to describe equine-related concepts, covering everything from anatomy to life stages, size, colors, markings, breeds, locomotion, and behavior. Horses are adapted to run, allowing them to quickly escape predators, and po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camel
A camel (from: la, camelus and grc-gre, κάμηλος (''kamēlos'') from Hebrew or Phoenician: גָמָל ''gāmāl''.) is an even-toed ungulate in the genus ''Camelus'' that bears distinctive fatty deposits known as "humps" on its back. Camels have long been domesticated and, as livestock, they provide food (milk and meat) and textiles (fiber and felt from hair). Camels are working animals especially suited to their desert habitat and are a vital means of transport for passengers and cargo. There are three surviving species of camel. The one-humped dromedary makes up 94% of the world's camel population, and the two-humped Bactrian camel makes up 6%. The Wild Bactrian camel is a separate species and is now critically endangered. The word ''camel'' is also used informally in a wider sense, where the more correct term is "camelid", to include all seven species of the family Camelidae: the true camels (the above three species), along with the "New World" camelids: the llama, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fetus
A fetus or foetus (; plural fetuses, feti, foetuses, or foeti) is the unborn offspring that develops from an animal embryo. Following embryonic development the fetal stage of development takes place. In human prenatal development, fetal development begins from the ninth week after fertilization (or eleventh week gestational age) and continues until birth. Prenatal development is a continuum, with no clear defining feature distinguishing an embryo from a fetus. However, a fetus is characterized by the presence of all the major body organs, though they will not yet be fully developed and functional and some not yet situated in their final anatomical location. Etymology The word ''fetus'' (plural ''fetuses'' or '' feti'') is related to the Latin '' fētus'' ("offspring", "bringing forth", "hatching of young") and the Greek "φυτώ" to plant. The word "fetus" was used by Ovid in Metamorphoses, book 1, line 104. The predominant British, Irish, and Commonwealth spelling is '' ... [...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 '' |
Antelope County, Nebraska
Antelope County is a County (United States), county located in the U.S. state of Nebraska. As of the 2020 United States Census, the population was 6,295. Its county seat is Neligh, Nebraska, Neligh. The county was formed in 1871. It received its name after a group of early settlers killed and ate several pronghorn. Although these are not true antelope, they are colloquially known by that name. The Ashfall Fossil Beds National Natural Landmark is located within the county. In the Vehicle registration plates of Nebraska, Nebraska license plate system, Antelope County is represented by the prefix 26 (it had the 26th-largest number of vehicles registered in the state when the license plate system was established in 1922). Geography According to the United States Census Bureau, US Census Bureau, the county has an area of , of which is land and (0.2%) is water. Adjacent counties * Pierce County, Nebraska, Pierce County – east * Madison County, Nebraska, Madison County – southe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Savanna
A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of grasses. According to '' Britannica'', there exists four savanna forms; ''savanna woodland'' where trees and shrubs form a light canopy, ''tree savanna'' with scattered trees and shrubs, ''shrub savanna'' with distributed shrubs, and ''grass savanna'' where trees and shrubs are mostly nonexistent.Smith, Jeremy M.B.. "savanna". Encyclopedia Britannica, 5 Sep. 2016, https://www.britannica.com/science/savanna/Environment. Accessed 17 September 2022. Savannas maintain an open canopy despite a high tree density. It is often believed that savannas feature widely spaced, scattered trees. However, in many savannas, tree densities are higher and trees are more regularly spaced than in for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
