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Moorefield Formation
The Moorefield Formation, or Moorefield Shale, is a Formation (geology), geologic formation in northern Arkansas and eastern Oklahoma that dates to the Meramec (series), Meramecian Series of the middle Mississippian (geology), Mississippian. In Arkansas, this formation is generally recognized to have one member, the Ruddell Shale, in the upper Moorefield Formation. Paleofauna Bryozoans *''Archimedes (bryozoan), Archimedes'' :''A. confertus'' :''A. proutanus'' *''Batostomella'' :''B. dubla'' :''B. parvula'' *''Tabulipora'' Cephalopods * ''Adnatoceras'' : ''A. alaskense'' * ''Bactrites'' : ''B. caronarius'' : ''B. smithianus'' * ''Endolobus'' : ''E. ornatus'' * ''Girtyoceras'' : ''G. welleri'' * ''Goniaties'' * ''Mitorthoceras'' See also * List of fossiliferous stratigraphic units in Arkansas * Paleontology in Arkansas References * Mississippian Oklahoma Mississippian Arkansas Carboniferous southern paleotropical deposits Shale formations of the United States Limestone fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formation (stratigraphy)
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] |
Carboniferous Southern Paleotropical Deposits
The Carboniferous ( ) is a geologic period and system of the Paleozoic era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the Permian Period, Ma. It is the fifth and penultimate period of the Paleozoic era and the fifth period of the Phanerozoic eon. In North America, the Carboniferous is often treated as two separate geological periods, the earlier Mississippian and the later Pennsylvanian. The name ''Carboniferous'' means "coal-bearing", from the Latin ("coal") and ("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. Carboniferous is the period during which both terrestrial animal and land plant life was well established. Stegocephalia (four-limbed vertebrates including true tetrapods), whose forerunners (tetrapodomor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mississippian Arkansas
{{Disambiguation ...
Mississippian may refer to: * Mississippian (geology), a subperiod of the Carboniferous period in the geologic timescale, roughly 360 to 325 million years ago * Mississippian cultures, a network of precontact cultures across the midwest and Eastern Woodlands in North America that flourished from about 800 to 1540 CE * Mississippian Railway, a short-line railroad * relating to the state of Mississippi See also * Mississippi (other) Mississippi is a southern state of the United States of America. Mississippi may also refer to: Places * Mississippi River, a river in central United States * Mississippi River System, a system of rivers in the Mississippi River watershed * Mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleontology In Arkansas
Paleontology in Arkansas refers to paleontological research occurring within or conducted by people from the U.S. state of Arkansas. The fossil record of Arkansas spans from the Ordovician to the Eocene. Nearly all of the state's fossils have come from ancient invertebrate life. During the early Paleozoic, much of Arkansas was covered by seawater. This sea would come to be home to creatures including ''Archimedes'', brachiopods, and conodonts. This sea would begin its withdrawal during the Carboniferous, and by the Permian the entire state was dry land. Terrestrial conditions continued into the Triassic, but during the Jurassic, another sea encroached into the state's southern half. During the Cretaceous the state was still covered by seawater and home to marine invertebrates such as '' Belemnitella''. On land the state was home to long necked sauropod dinosaurs, who left behind footprints and ostrich dinosaurs such as ''Arkansaurus''. During the Cenozoic the state's seas were in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In Arkansas
This article contains a list of fossil-bearing stratigraphic units in the state of Arkansas, Arkansas, U.S. Sites See also * Paleontology in Arkansas References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Arkansas Fossiliferous stratigraphic units of the United States, Arkansas Paleontology in Arkansas, Stratigraphic units Stratigraphy of Arkansas Arkansas geography-related lists United States geology-related lists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endolobus
''Endolobus'' is an extinct genus from the nautiloid order, Nautilida. Nautiloids are a subclass of shelled cephalopods that were once diverse and numerous but are now represented by only a handful of species, including ''Nautilus''. ''Endolubus'' is included in the family Koninckioceratidae which is part of the superfamily Tainoceratoidea (Kümmel, 1964. K424). The shell of ''Endolobus'' is an evolute spiral with whorl sections subelliptical; broadly rounded ventrally, narrowly rounded laterally, and slightly impressed dorsally (Kümmel, 1964. K424). There are low nodes on the flanks and the suture is slightly sinuous but with a prominent dorsal lobe. The siphuncle is small, subcentral, and orthochoanitic. ''Endolobus'' has a range from the Lower Carboniferous (U Miss) to the Lower Permian and has been found in different locations in North America and eastern Europe. References * Kümmel, B. (1964); Nautiloidea—Nautilida, in the Treatise on Invertebrate Paleontology Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
