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Paleocene Ammonites
The term Paleocene ammonites describes families or genera of Ammonoidea that may have survived the Cretaceous–Paleogene extinction event, which occurred 66.043 million years ago. Although almost all evidence indicated that ammonites did not survive past the K–Pg boundary, there is some scattered evidence that some ammonites lived for a short period of time during the Paleocene epoch, although none survived the Danian (66-61 Ma); they were likely extinct within 500,000 years of the K-Pg extinction event, which correlates to roughly 65.5 Ma. The evidence for Paleocene ammonoids is rare and remains controversial. Implications There have been reliable reports of ammonite fossils from the early Paleocene. The most notable fossil finds of Paleocene ammonoids are '' Baculites vertebralis'' and '' Hoploscaphites constrictus'' in Denmark, the survivors joined by '' Eubaculites carinatus'' in the Netherlands. ''Discoscaphites'' and ''Eubaculites'' (potentially along with other ammonit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoploscaphites Ammonite
''Hoploscaphites'' is an extinct ammonite genus from the Upper Cretaceous and the Lower Paleocene, included in the family Scaphitidae. Morphology It is considered by some to be a subgenus of '' Scaphites''. Like ''Scaphites'' the shell of ''Hoploscaphites'' is involute with the final whorl projecting forward and curved back on itself. Shells vary from compressed to inflated with convex sides. Tubercles normally present may be sparse or absent. Distribution Fossils of ''Hoploscaphites'' have been found in Antarctica, Austria, Belgium, Bulgaria, Canada (Alberta, Saskatchewan), Chile, Denmark, France, Germany, Greenland, India, the Netherlands, Turkmenistan, Ukraine and the United States (Arkansas, Colorado, Delaware, Kansas, New Jersey, New Mexico, North Dakota, South Dakota, Texas, Wyoming).''Hoploscaphite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hornerstown Formation
The Hornerstown Formation is a Paleogene or latest Mesozoic geologic formation in New Jersey.Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607. The age of these deposits have been controversial. While most fossils are of animals types known from the earliest Cenozoic era, several fossils of otherwise exclusively Cretaceous age have been found. These include remains of the shark ''Squalicorax'', the teleost fish ''Enchodus'', several species of ammonite, and marine lizards referred to the genus ''Mosasaurus''. Some of these remains show signs of severe abrasion and erosion, however, implying that they are probably re-worked from older deposits. Most of these fossils are restricted to the lowest point in the formation, one rich in fossils and known as the Main Fossiliferous Layer, or MFL. Other explanations for the out-of-place fossils in the MFL is that they represent a time-averaged assemblage that built up and remained unburied during a time of low sediment depositio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sumbar River
The Sumbar (also Sari-su, Sara-su and Ṣáríṣú) is a fast flowing river in southern Turkmenistan and northern Iran. It a tributary of the Atrek. The name Sari-su means ''yellow water'' in Turkic languages, but is applied to a number of other rivers as well. It used to be an area for Caspian tigersGeptner, V. G., Sludskij, A. A. (1972). ''Mlekopitajuščie Sovetskogo Soiuza.'' Vysšaia Škola, Moskva. (In Russian; English translation: Heptner, V.G., Sludskii, A. A., Komarov, A., Komorov, N.; Hoffmann, R. S. (1992)''Mammals of the Soviet Union. Vol III: Carnivores (Feloidea).''Smithsonian Institution and the National Science Foundation, Washington DC). in Turkmenistan, until the last individual was killed in January 1954. Geography The Sumbar is long and drains a basin of . It arises in the Kopet Dag mountains in Iran and flows into Turkmenistan. For a long stretch before the Sumbar runs into the Atrek, it is separated from it by a range of hills called the Marábeh. The Atrek ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maastricht Formation
The Maastricht Formation (Dutch: ''Formatie van Maastricht''; abbreviation: MMa), named after the city of Maastricht in the Netherlands, is a geological formation in the Netherlands and Belgium whose strata date back to the Late Cretaceous, within 500,000 years of the Cretaceous–Paleogene boundary, now dated at . The formation is part of the Chalk Group and is between thick. It crops out in southern parts of Dutch and Belgian Limburg and adjacent areas in Germany. It can be found in the subsurface of northern Belgium and southeastern Netherlands, especially in the Campine Basin and Roer Valley Graben. Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, Europe)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 588-593. . Lithology The Maastricht Formation consists of soft, sand ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rødvig Formation
The Rødvig Formation is a geological formation deposited during the earliest part of the Danian (early Paleocene; ) and it was first identified by Richard Taylor and Richard Phillips in 1827. It is known from exposures at Stevns Klint in Denmark. The unit lies directly above the K–Pg boundary and contains fossils that provide a record of the recovery of various groups following the Cretaceous–Paleogene extinction. The upper boundary of the formation is an unconformity in the form of a hardground, beneath which the formation is sometimes missing. The base of the unit is irregular due to the presence of mounding associated with bryozoa, causing variations in thickness. The unit is subdivided into the lower ''Fiskeler Member'' mainly formed of marl and the overlying ''Cerithium Limestone Member''. Geology The dark layer of , mainly five to ten centimeters thick, clearly marks the Cretaceous–Paleogene boundary and overlies the Maastrichtian age Tor Formation. The is enri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Texas
Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2020, it is the second-largest U.S. state by both List of U.S. states and territories by area, area (after Alaska) and List of U.S. states and territories by population, population (after California). Texas shares borders with the states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexico, Mexican States of Mexico, states of Chihuahua (state), Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the south and southwest; and has a coastline with the Gulf of Mexico to the southeast. Houston is the List of cities in Texas by population, most populous city in Texas and the List of United States cities by population, fourth-largest in the U.S., while San Antonio is the second most pop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brazos River
The Brazos River ( , ), called the ''Río de los Brazos de Dios'' (translated as "The River of the Arms of God") by early Spanish explorers, is the 11th-longest river in the United States at from its headwater source at the head of Blackwater Draw, Roosevelt County, New Mexico to its mouth at the Gulf of Mexico with a drainage basin. Being one of Texas' largest rivers,"Brazos River." Britannica Academic, Encyclopædia Britannica, 11 Aug. 2018. academic.eb.com/levels/collegiate/article/Brazos-River/16291. Accessed 27 Nov. 2018. it is sometimes used to mark the boundary between East Texas and West Texas. The river is closely associated with Texas history, particularly the Austin settlement and Texas Revolution eras. Today major Texas institutions such as Texas Tech University, Baylor University, and Texas A&M University are located close to the river's basin, as are parts of metropolitan Houston. Geography The Brazos proper begins at the confluence of the Salt Fork and Double ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turkmenistan
Turkmenistan ( or ; tk, Türkmenistan / Түркменистан, ) is a country located in Central Asia, bordered by Kazakhstan to the northwest, Uzbekistan to the north, east and northeast, Afghanistan to the southeast, Iran to the south and southwest and the Caspian Sea to the west. Ashgabat is the capital and largest city. The population is about 6 million, the lowest of the Central Asian republics, and Turkmenistan is one of the most sparsely populated nations in Asia. Turkmenistan has long served as a thoroughfare for other nations and cultures. Merv is one of the oldest oasis-cities in Central Asia, and was once the biggest city in the world. It was also one of the great cities of the Islamic world and an important stop on the Silk Road. Annexed by the Russian Empire in 1881, Turkmenistan figured prominently in the anti-Bolshevik movement in Central Asia. In 1925, Turkmenistan became a constituent republic of the Soviet Union, the Turkmen Soviet Socialist Repu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kopet Dag
The Köpet Dag, Kopet Dagh, or Koppeh Dagh ( tk, Köpetdag; fa, کپهداغ), also known as the Turkmen-Khorasan Mountain Range, is a mountain range on the border between Turkmenistan and Iran that extends about along the border southeast of the Caspian Sea, stretching northwest-southeast from near the Caspian Sea in the northwest to the Harirud River in the southeast. In the southwest it borders on the parallel eastern endings of the Alborz mountains being together part of the much larger Alpide belt. The highest peak of the range in Turkmenistan is the Mount Rizeh (Kuh-e Rizeh), located at the southwest of the capital Ashgabat and stands at . The highest Iranian summit is Mount Quchan (Kuh-e Quchan) with . Etymology Vambery conjectured that ''köpet'' originates from the Turkmen language where "köp" means "a lot" or "many" and the word "dag" means "mountain" or "peak". He thus translated Köpetdag as "Many mountains (peaks)". He and others noted that in Persian ''koppe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maastrichtian
The Maastrichtian () is, in the ICS geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval from . The Maastrichtian was preceded by the Campanian and succeeded by the Danian (part of the Paleogene and Paleocene). The Cretaceous–Paleogene extinction event (formerly known as the Cretaceous–Tertiary extinction event) occurred at the end of this age. In this mass extinction, many commonly recognized groups such as non-avian dinosaurs, plesiosaurs and mosasaurs, as well as many other lesser-known groups, died out. The cause of the extinction is most commonly linked to an asteroid about wide colliding with Earth, ending the Cretaceous. Stratigraphic definitions Definition The Maastrichtian was introduced into scientific literature by Belgian geologist André Hubert Dumont in 1849, after studying rock strata of the Chalk Group c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Jersey
New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware River and Pennsylvania; and on the southwest by Delaware Bay and the state of Delaware. At , New Jersey is the fifth-smallest state in land area; but with close to 9.3 million residents, it ranks 11th in population and first in population density. The state capital is Trenton, and the most populous city is Newark. With the exception of Warren County, all of the state's 21 counties lie within the combined statistical areas of New York City or Philadelphia. New Jersey was first inhabited by Native Americans for at least 2,800 years, with the Lenape being the dominant group when Europeans arrived in the early 17th century. Dutch and Swedish colonists founded the first European settlements in the state. The British later seized control o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tinton Formation
The Tinton Formation is a geologic formation in New Jersey. It preserves fossils dating back to the Cretaceous-Paleocene periods, such as ammonites. See also * List of fossiliferous stratigraphic units in New Jersey * Paleontology in New Jersey The location of the state of New Jersey Paleontology in New Jersey refers to paleontological research in the US state of New Jersey. The state is especially rich in marine deposits. During the Precambrian, New Jersey was covered by a shallow s ... References * Cretaceous geology of New Jersey {{NewJersey-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
