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Siphonodella
''Siphonodella'' is an extinct genus of conodonts. ''Siphonodella banraiensis'' is from the Late Devonian of Thailand. ''Siphonodella nandongensis'' is from the Early Carboniferous of the Baping Formation in China.New material of the Early Carboniferous conodonts from the lower member of the Baping Formation in Nandong, Guangxi, China. Zhihong Li, Zhongqin Peng, Long Cheng, Chuanshang Wang and Baozhong Wang, Acta Micropalaeontologica Sinica, 2014, volume 31, issue 3, pages 271–284 Use in stratigraphy The Tournaisian, the oldest age of the Mississippian (also known as Lower Carboniferous) contains eight conodont biozones, two of which are characterized by ''Siphonodella'' species: * the zone of '' Gnathodus typicus'' and ''Siphonodella isosticha'' * the zone of ''Siphonodella quadruplicata'' and '' Patrognathus andersoni'' (upper zone of ''Patrognathus andersoni'') The GSSP Golden Spike for the Tournaisian is in La Serre La Serre (; oc, La Sèrra) is a commune in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tournaisian Life
The Tournaisian is in the ICS geologic timescale the lowest stage or oldest age of the Mississippian, the oldest subsystem of the Carboniferous. The Tournaisian age lasted from Ma to Ma. It is preceded by the Famennian (the uppermost stage of the Devonian) and is followed by the Viséan. Name and regional alternatives The Tournaisian was named after the Belgian city of Tournai. It was introduced in scientific literature by Belgian geologist André Hubert Dumont in 1832. Like many Devonian and lower Carboniferous stages, the Tournaisian is a unit from West European regional stratigraphy that is now used in the official international time scale. The Tournaisian correlates with the regional North American Kinderhookian and lower Osagean stages and the Chinese Tangbagouan regional stage. In British stratigraphy, the Tournaisian contains three substages: the Hastarian, Ivorian and lower part of the Chadian (the upper part falls in the Viséan). Stratigraphy The base of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tournaisian
The Tournaisian is in the ICS geologic timescale the lowest stage or oldest age of the Mississippian, the oldest subsystem of the Carboniferous. The Tournaisian age lasted from Ma to Ma. It is preceded by the Famennian (the uppermost stage of the Devonian) and is followed by the Viséan. Name and regional alternatives The Tournaisian was named after the Belgian city of Tournai. It was introduced in scientific literature by Belgian geologist André Hubert Dumont in 1832. Like many Devonian and lower Carboniferous stages, the Tournaisian is a unit from West European regional stratigraphy that is now used in the official international time scale. The Tournaisian correlates with the regional North American Kinderhookian and lower Osagean stages and the Chinese Tangbagouan regional stage. In British stratigraphy, the Tournaisian contains three substages: the Hastarian, Ivorian and lower part of the Chadian (the upper part falls in the Viséan). Stratigraphy The base of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carboniferous Conodonts
The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carboniferous'' means "coal-bearing", from the Latin '' carbō'' ("coal") and '' ferō'' ("bear, carry"), and refers to the many coal beds formed globally during that time. The first of the modern 'system' names, it was coined by geologists William Conybeare and William Phillips in 1822, based on a study of the British rock succession. The Carboniferous is often treated in North America as two geological periods, the earlier Mississippian and the later Pennsylvanian. Terrestrial animal life was well established by the Carboniferous Period. Tetrapods (four limbed vertebrates), which had originated from lobe-finned fish during the preceding Devonian, became pentadactylous in and diversified during the Carboniferous, including early amphibian lineages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mississippian (geology)
The Mississippian ( , also known as Lower Carboniferous or Early Carboniferous) is a subperiod in the geologic timescale or a subsystem of the geologic record. It is the earlier of two subperiods of the Carboniferous period lasting from roughly 358.9 to 323.2 million years ago. As with most other geochronologic units, the rock beds that define the Mississippian are well identified, but the exact start and end dates are uncertain by a few million years. The Mississippian is so named because rocks with this age are exposed in the Mississippi Valley. The Mississippian was a period of marine transgression in the Northern Hemisphere: the sea level was so high that only the Fennoscandian Shield and the Laurentian Shield were dry land. The cratons were surrounded by extensive delta systems and lagoons, and carbonate sedimentation on the surrounding continental platforms, covered by shallow seas. In North America, where the interval consists primarily of marine limestones, it is treate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Devonian Conodonts
The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, where rocks from this period were first studied. The first significant adaptive radiation of life on dry land occurred during the Devonian. Free-sporing vascular plants began to spread across dry land, forming extensive forests which covered the continents. By the middle of the Devonian, several groups of plants had evolved leaves and true roots, and by the end of the period the first seed-bearing plants appeared. The arthropod groups of myriapods, arachnids and hexapods also became well-established early in this period, after starting their expansion to land at least from the Ordovician period. Fish reached substantial diversity during this time, leading the Devonian to often be dubbed the Age of Fishes. The placoderms began dominating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Global Boundary Stratotype Sections And Points
This is a list of Global Boundary Stratotype Sections and Points. Since 1977, Global Boundary Stratotype Sections and Points (abbreviated GSSPs) are internationally agreed upon reference points on stratigraphic sections of rock which define the lower boundaries of stages on the geologic time scale. They are selected by the International Commission on Stratigraphy based on multiple factors, but their accessibility and the degree to which they are representative of the same boundary on sections worldwide are among the most important. Since GSSPs require well-preserved sections of rock without interruptions in sedimentation, and since most are defined by different stages of animal life, defining them becomes progressively more difficult as one goes further back in time. Organization of this list This list is divided first into the geologic eras of the Phanerozoic (the Cenozoic, the Mesozoic, and the Paleozoic) and then into the geologic periods of each era. Each period is marked ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gnathodus Typicus
''Gnathodus'' is an extinct conodont genus in the family Idiognathodontidae. Use in stratigraphy The Tournaisian, the oldest age of the Mississippian (also known as Lower Carboniferous), contains eight conodont biozones, 3 of which are defined by ''Gnathodus species'': * the zone of ''Gnathodus pseudosemiglaber'' and '' Scaliognathus anchoralis'' * the zone of ''Gnathodus semiglaber'' and ''Polygnathus communis'' * the zone of ''Gnathodus typicus'' and ''Siphonodella isosticha'' The Visean, the second age of the Mississippian, contains four conodont biozones, two of which are defined by ''Gnathodus'' species: * the ''Gnathodus bilineatus'' Zone * the ''Gnathodus texanus'' Zone The Serpukhovian, the third or youngest age of the Mississippian, includes four conodont biozones, two of which are defined by ''Gnathodus'' species: * the ''Gnathodus postbilineatus'' Zone * the ''Gnathodus bollandensis'' Zone References * Proposal of Gnathodus bilineatus (Roundy, 1926) as type ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edward Branson
Edward B. Branson was an American geologist and paleontologist. He was a professor of geology at the University of Missouri. Overview of career Branson earned his doctorate at the University of Chicago and joined the Geology department at the University of Missouri in 1911. During his doctoral studies, he had spent time searching for fossils near Lander, Wyoming and so he determined to set up a camp for the hands-on study of geology and paleontology nearby. Also in 1911, he came to Lander with a group of students and established the Missouri Field Geology Camp, which is now known as the Branson Field Laboratory, near Sinks Canyon State Park. The Branson Field Laboratory appears to be the oldest continually operated field geology camp in the United States. Eventually Branson formed a scientific partnership with Maurice "Doc" Mehl, another Chicago graduate who joined the Missouri faculty in 1919. Branson retired in 1948, which is when the camp was renamed in his honor. Contribu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maurice Mehl
Maurice Goldsmith Mehl (1887 - 1966) was an American paleontologist and professor in the Department of Geology at the University of Missouri. Life and career Mehl was born on December 25, 1887, to Frank and Rebecca Goldsmith Mehl. After graduation from Burlingame High School, he attended the University of Chicago, where he completed a B.S. in 1911 and a Ph.D. in 1914. While at Chicago, he met Lucy Jane Hull and they were married in 1912. At Chicago, Mehl studied vertebrate paleontology under the instruction of prominent paleontologist Samuel Wendell Williston. He taught at Chicago for awhile as well as at University of Wisconsin, University of Oklahoma, and Denison University before joining the University of Missouri in 1919. In addition to teaching and researching at Missouri until his retirement in 1958, where he became known simply as "Doc" Mehl, he also worked as a consultant to the Missouri Geological Survey and Water Resources. While at Missouri, he had a long and produ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1944 In Paleontology
Plants Conodonts Dinosaurs * The only known fossils of ''Poekilopleuron'' are destroyed during the Allied liberation of Normandy. Newly named dinosaurs Data are courtesy of George Olshevky's dinosaur genera list. Plesiosaurs New taxa References {{portal, Paleontology 1940s in paleontology Paleontology Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossi ... Paleontology 4 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patrognathus Andersoni
''Patrognathus'' is an extinct genus of conodonts. Use in stratigraphy The Tournaisian The Tournaisian is in the ICS geologic timescale the lowest stage or oldest age of the Mississippian, the oldest subsystem of the Carboniferous. The Tournaisian age lasted from Ma to Ma. It is preceded by the Famennian (the uppermost stage ..., the oldest age of the Mississippian (also known as Lower Carboniferous) contains eight conodont biozones, four of which contain ''Patrognathus'' species: * the zone of '' Siphonodella quadruplicata'' and ''Patrognathus andersoni'' (upper zone of ''Patrognathus andersoni'') * the lower zone of ''Patrognathus andersoni'' * the zone of ''Patrognathus variabilis'' * the zone of ''Patrognathus crassus'' References External links * * Ozarkodinida genera Mississippian conodonts Tournaisian life Fossil taxa described in 1969 Mississippian first appearances Mississippian extinctions {{conodont-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Serre
La Serre (; oc, La Sèrra) is a commune in the Aveyron department in southern France. Population The GSSP Golden Spike for the Tournaisian is in La Serre, with the first appearance of the conodont '' Siphonodella sulcata''. In 2006 it was discovered that this GSSP has biostratigraphic problems. See also *Communes of the Aveyron department The following is a list of the 285 Communes of France, communes of the Aveyron Departments of France, department of France. The communes cooperate in the following Communes of France#Intercommunality, intercommunalities (as of 2020): References Communes of Aveyron Aveyron communes ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
