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Four Mile Dam Formation
The Four Mile Dam Formation, also called the Four Mile Dam Limestone, is a Formation (geology), geologic formation in Michigan. It preserves fossils dating back to the middle Devonian Period (geology), period. Fossil content Vertebrates Acanthodians Conodonts Placoderms Invertebrates Brachiopods Corals Gastropods Sponges Trilobites See also * List of fossiliferous stratigraphic units in Michigan References * Devonian Michigan Devonian southern paleotemperate deposits {{Michigan-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness (geology), thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
An Examination Of The Devonian Fishes Of Michigan Fig-5-a
An, AN, aN, or an may refer to: Businesses and organizations * Airlinair (IATA airline code AN) * Alleanza Nazionale, a former political party in Italy * AnimeNEXT, an annual anime convention located in New Jersey * Anime North, a Canadian anime convention * Ansett Australia, a major Australian airline group that is now defunct (IATA designator AN) * Apalachicola Northern Railroad (reporting mark AN) 1903–2002 ** AN Railway, a successor company, 2002– * Aryan Nations, a white supremacist religious organization * Australian National Railways Commission, an Australian rail operator from 1975 until 1987 * Antonov, a Ukrainian (formerly Soviet) aircraft manufacturing and services company, as a model prefix Entertainment and media * Antv, an Indonesian television network * ''Astronomische Nachrichten'', or ''Astronomical Notes'', an international astronomy journal * '' Avisa Nordland'', a Norwegian newspaper * '' Sweet Bean'' (あん), a 2015 Japanese film also known as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferron Point Formation
The Ferron Point Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian 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, whe ... period. References * Devonian Michigan Middle Devonian Series {{Michigan-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Icriodus
''Icriodus'' is an extinct conodont genus in the family Gnathodontidae. In 1938, Edward Branson and 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 gradu ... reviewed the conodont genus ''Icriodus''.The Conodont Genus Icriodus and Its Stratigraphic Distribution. E. B. Branson and M. G. Mehl, Journal of Paleontology, Vol. 12, No. 2 (Mar., 1938), pages 156-166Stable URLretrieved 29 April 2016) References External links * * Ozarkodinida genera Devonian conodonts Paleozoic life of Ontario Paleozoic life of the Northwest Territories Paleozoic life of Nunavut Paleozoic life of Yukon {{Conodont-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antrim Shale
The Antrim Shale is a formation of Upper Devonian age in the Michigan Basin, in the US state of Michigan, and extending into Ohio, Indiana and Wisconsin. It is a major source of natural gas in the northern part of the basin. The Antrim Shale was defined by A. C. Lane in 1901, and named for type-section exposures in Antrim County, Michigan. The formation was previously known as the St. Cleric Shale in Michigan, and the Genesee Shale in Indiana. Stratigraphy The Antrim is a brown to black, pyritic, highly laminated and organic-rich shale, from 60 to 220 feet thick. Total organic content varies from 1% to 20%. In some places the unit includes a gray calcareous shale or limestone, and in places a fine-grained sandstone at the base. The formation is called the Kettle Point Formation in Ontario, and is the stratigraphic equivalent of the New Albany Shale in the Illinois Basin. It is overlain by the Bedford Shale, and underlain in some areas by the Jordan River Formation, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norway Point Formation
The Norway Point Formation is a geologic formation in Michigan. It preserves fossils dating back to the middle Devonian period. Fossil content Vertebrates Invertebrates See also * List of fossiliferous stratigraphic units in Michigan This article contains a list of fossil-bearing stratigraphic units in the state of Michigan, U.S. Sites See also * Paleontology in Michigan References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Michigan Michigan Stratigraphi ... References * Devonian Michigan Devonian southern paleotemperate deposits {{Michigan-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpena Limestone
The Alpena Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian 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, w ... period. References * Devonian Michigan Devonian southern paleotemperate deposits Middle Devonian Series {{Michigan-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell Shale
The Bell Shale is a geologic formation in Michigan. It preserves fossils dating back to the Devonian 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, whe ... period. References * Devonian Michigan Middle Devonian Series {{Michigan-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dundee Limestone
The Dundee Limestone is a geologic formation in Michigan, Ohio and Ontario. It preserves fossils dating back to the Devonian period. See also * List of fossiliferous stratigraphic units in Ohio This article contains a list of fossil-bearing stratigraphic units in the state of Ohio, U.S. Sites See also * Paleontology in Ohio References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Ohio Ohio Paleontology in Ohio St ... References * Devonian Ohio Devonian southern paleotemperate deposits Devonian southern paleotropical deposits Middle Devonian Series {{Ohio-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traverse Formation
The Traverse Formation is a geologic formation A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ... in Indiana. References Generalized Stratigraphic Column of Indiana Bedrock Geology of Indiana {{Indiana-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
