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Aponileus Glaber
''Aponileus'' is an extinct genus of trilobites. Chung-Hung Hu circumscription (taxonomy), circumscribed the genus in 1963. The genus was once considered a junior subjective synonym of the genus ''Psephosthenaspis'' but it is considered to be a distinct genus again. , fossils have been found in Greenland, Texas, and Utah. They all date to the Upper Floian (Blackhillsian) within the Ordovician Period. Taxonomic history ''Aponileus'' was initially circumscription (taxonomy), circumscribed by Chung-Hung Hu in 1963. The type species is ''A. latus'', also species description, described by Hu in 1963. The type material was poorly preserved. Hu initially said that ''Aponileus'' is "most like ''Nileus''", i.e., treating it as a Nileidae, nileid. Subsequently, this genus received "virtually no mention" in the trilobite literature for many years, aside from C. P. Hughes's 1979 assessment that two specimens which Lehi F. Hintze had tentatively assigned to ''Barrandia'' in 1953 should be plac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floian
The Floian is the second stage of the Ordovician Period. It succeeds the Tremadocian with which it forms the Lower Ordovician series. It precedes the Dapingian Stage of the Middle Ordovician. The Floian extended from to million years ago. The lower boundary is defined as the first appearance of the graptolite species '' Tetragraptus approximatus''. History and naming The base of this stage was ratified by the International Commission on Stratigraphy (ICS) in 2002. The Floian Stage is named after Flo, a village in Västergötland, southern Sweden. The name "Floan" was proposed in 2004, but the ICS adapted Floian as the official name of the stage. GSSP The GSSP of the Floian is the lower Tøyen Shale in Diabasbrottet Quarry () which is an outcrop of a shale-dominated stratigraphic succession. The lower boundary of the Floian is defined as the first appearance of '' Tetragraptus approximatus'' which is about 2.1 above the Cambrian strata. Radiometric dating has set the Tremad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soviet Space Dogs
During the 1950s and 1960s the Soviet space program used dogs for sub-orbital and Orbital spaceflight, orbital space flights to determine whether human spaceflight was feasible. The Soviet space program typically used female dogs due to their anatomical compatibility with the spacesuit. Similarly, they used mix-breed dogs due to their apparent hardiness. In this period, the Soviet Union launched missions with passenger slots for at least 57 dogs. Some dogs flew more than once. Most survived; those that died were lost mostly through technical failures, according to the parameters of the test. Laika was an exception and was expected to die during her Earth-orbiting 3 November 1957 Sputnik 2. Training Dogs were the preferred animal for the experiments because scientists felt dogs were well suited to endure long periods of inactivity. As part of their training, they were confined in small boxes for 15–20 days at a time. Stray dogs, rather than animals accustomed to living in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aponileus Glaber
''Aponileus'' is an extinct genus of trilobites. Chung-Hung Hu circumscription (taxonomy), circumscribed the genus in 1963. The genus was once considered a junior subjective synonym of the genus ''Psephosthenaspis'' but it is considered to be a distinct genus again. , fossils have been found in Greenland, Texas, and Utah. They all date to the Upper Floian (Blackhillsian) within the Ordovician Period. Taxonomic history ''Aponileus'' was initially circumscription (taxonomy), circumscribed by Chung-Hung Hu in 1963. The type species is ''A. latus'', also species description, described by Hu in 1963. The type material was poorly preserved. Hu initially said that ''Aponileus'' is "most like ''Nileus''", i.e., treating it as a Nileidae, nileid. Subsequently, this genus received "virtually no mention" in the trilobite literature for many years, aside from C. P. Hughes's 1979 assessment that two specimens which Lehi F. Hintze had tentatively assigned to ''Barrandia'' in 1953 should be plac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aponileus Aasei
''Aponileus'' is an extinct genus of trilobites. Chung-Hung Hu circumscribed the genus in 1963. The genus was once considered a junior subjective synonym of the genus '' Psephosthenaspis'' but it is considered to be a distinct genus again. , fossils have been found in Greenland, Texas, and Utah. They all date to the Upper Floian (Blackhillsian) within the Ordovician Period. Taxonomic history ''Aponileus'' was initially circumscribed by Chung-Hung Hu in 1963. The type species is ''A. latus'', also described by Hu in 1963. The type material was poorly preserved. Hu initially said that ''Aponileus'' is "most like '' Nileus''", i.e., treating it as a nileid. Subsequently, this genus received "virtually no mention" in the trilobite literature for many years, aside from C. P. Hughes's 1979 assessment that two specimens which Lehi F. Hintze had tentatively assigned to '' Barrandia'' in 1953 should be placed in ''Aponileus''. In 2003, Jonathan M. Adrain synonymized ''Aponileus'' with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millard County, Utah
Millard County ( ) is a county in the U.S. state of Utah. As of the 2020 United States census, the population was 12,975. Its county seat is Fillmore, and the largest city is Delta. History The Utah Territory legislature created the county on October 4, 1851, with territory not previously covered by county creations and including some area in the future state of Nevada. It was named for the thirteenth US President Millard Fillmore, who was in office then. Fillmore was designated as the county seat. The county boundaries were altered in 1852 and again in 1854. On March 2, 1861, the US government created the Nevada Territory, which effectively de-annexed the described portion of Millard County falling in that Territorial Proclamation. The county boundary was further altered in 1862, 1866, 1888, and in 1919. In 1921 a boundary adjustment with Sevier brought Millard to its present configuration. Fillmore, located near the geographic center of the territory, was originally buil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Confusion Range
The Confusion Range is a north-south trending mountain range in west-central Utah, United States. It is bounded by Snake Valley to the west, Tule Valley to the east, the Great Salt Lake Desert to the north, and the Ferguson Desert to the south. The range trends into the Burbank Hills, Mountain Home Range, and the Wah Wah Mountains to the south. In the central part of the range, an offshoot of the mountains to the west is known as the Conger Range. The Confusion Range is named for its "rugged isolation and confusing topography."Van Cott, J. W., 1990, Utah Place Names, The highest peaks in the range are Conger Mountain , which is 7,713 feet tall, and King Top , which is 8,350 feet tall. Geology The geology of the Confusion range is deformed Silurian to Permian limestones, dolomites, and shale Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of Clay mineral, clay minerals (hydrous aluminium phyllosilicates, e.g., Kaolinite, ka ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington Land
Washington Land is a peninsula in northwestern Greenland. It is a part of the Avannaata municipality. Washington Land was explored in the 19th century. Traditionally it was one of the hunting grounds of the Inuit, but there are archaeological remains of more permanent human habitation in ancient times. Geography Washington Land is located to the west of Daugaard-Jensen Land, between the Kane Basin in the west and northwest and Peabody Bay in the south. Crozier Island, Franklin Island (Greenland), Franklin Island and Hans Island are located off Lafayette Bay in its NW shore. The Cass Fjord forms the peninsula's southeastern coastline, across which is the Humboldt Glacier and beyond it Inglefield Land. The Aleqatsiaq Fjord forms the limit of its northern shore. Cape Jackson (Greenland), Cape Jackson is Washington Land's south-westernmost headland and protrudes at the junction of the Kennedy Channel and the Kane Basin.''Prostar Sailing Directions 2005 Greenland and Iceland Enroute,' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Franklin Mountains (Texas)
__NOTOC__ The Franklin Mountains of Texas () are a small range long, wide that extend from El Paso, Texas, north into New Mexico. The Franklins were formed due to crustal extension related to the Cenozoic Rio Grande rift. Although the present topography of the range and adjoining basins is controlled by extension during rifting in the last 10 million years, faults within the range also record deformation during the Laramide orogeny, between 85 and 45 million years ago. The highest peak is North Franklin Peak at . Much of the range is part of the Franklin Mountains State Park. The mountains are composed primarily of sedimentary rock with some igneous intrusions. Geologists refer to them as tilted-block fault mountains and in them can be found 1.25 billion-year-old Precambrian rocks, the oldest in Texas. Gallery File:Richardson 1908 FranklinMts.jpg, View of the south end of Franklin Mountains from El Paso, showing the abrupt termination of the range, its westward dip slop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
El Paso Formation
The El Paso Formation is a geologic formation that is exposed from the Permian Basin of New Mexico and Texas to southeastern Arizona. It preserves fossils dating back to the Ordovician period. Description The formation is composed of gray cherty dolomite, limestone, and smaller amounts of siltstone. The formation often has a mottled appearance. Total thickness is . It lies unconformably on the Bliss Formation, the Coronado Sandstone, or (in the Florida Mountains) Precambrian basement, and is overlain by the Montoya Group or Portal Formation. Fossils The formation is only sparsely fossiliferous, but contains fossils of echinoderms, gastropods, trilobites, sponge spicules, and ''Nuia''. Rare ostracods, cephalopods, and brachiopods are also found, as is the trace fossil '' Planolites''. Bioherms up to high are found in the McKelligon Member, built up of siliceous sponges and receptaculitid '' Calathium''. History of investigation The formation was first named by George Bur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lower Ordovician
The Early Ordovician is the first epoch of the Ordovician period, corresponding to the Lower Ordovician series of the Ordovician system. It began after the Age 10 of the Furongian epoch of the Cambrian and lasted from to million years ago, until the Dapingian age of the Middle Ordovician. It includes Tremadocian and Floian ages. History International Commission on Stratigraphy (ICS) appointed working groups on the boundaries of the Ordovician subdivisions in 1974. The boundaries were established by the fauna of conodonts and/or graptolites. In 1995, the Subcommission on Ordovician Stratigraphy, with the support of 90% majority of voting members, adopted the division of the Ordovician system into three series: Lower, Middle and Upper. In the same year, it was decided to divide each of the three series into two global stages. ''Tetragraptus approximatus'' zone was chosen as the base of the upper stage of the Lower Ordovician by 95% of the votes. Before the adoption of the in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basal (phylogenetics)
In phylogenetics, basal is the direction of the ''base'' (or root) of a phylogenetic tree#Rooted tree, rooted phylogenetic tree or cladogram. The term may be more strictly applied only to nodes adjacent to the root, or more loosely applied to nodes regarded as being close to the root. Note that extant taxa that lie on branches connecting directly to the root are not more closely related to the root than any other extant taxa. While there must always be two or more equally "basal" clades sprouting from the root of every cladogram, those clades may differ widely in taxonomic rank, Phylogenetic diversity, species diversity, or both. If ''C'' is a basal clade within ''D'' that has the lowest rank of all basal clades within ''D'', ''C'' may be described as ''the'' basal taxon of that rank within ''D''. The concept of a 'key innovation' implies some degree of correlation between evolutionary innovation and cladogenesis, diversification. However, such a correlation does not make a given ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
