Witts Springs Formation

	Witts Springs Formation The Witts Springs Formation is a sandstone Formation (geology), geologic formation in Arkansas with thin layers of limestone, shale, and siltstone. It preserves fossils dating back to the Carboniferous Period (geology), period. Paleontology Bivalves ''Aviculopecten'' :''A. arkansanus'' ''Conocardium'' ''Myalina'' ''Pleurophorus'' ''Posidonia'' ''Sphenotus'' Brachiopods ''Antiquatonia'' :''A. morrowensis'' ''Composita'' :''C. ozarkana'' ''Juresania'' ''Linoproductus'' ''Schizophoria'' :''S. altirostris'' ''Spirifer'' Cephalopods ''Gastrioceras'' :''G. adaense'' ''Glaphyrites'' :''G. globosus'' :''G. morrowensis'' :''G. oblatus'' ''Mooreoceras'' ''Pygmaeoceras'' ''Stenopronorites'' :''S. arkansiensis'' Coral ''Michelinia'' Gastropods ''Bellerophon'' ''Donaldina (gastropod), Donaldina'' ''Euphemites'' ''Glabrocingulum'' ''Knightites (Retispira or Cymatospire)'' Scaphopods ''Laevidentalium'' Trilobites ''Paladin (trilobite), Paladin'' See also List o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	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 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 Abraham Gottlob W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Conocardium ''Conocardium'' is an extinct genus of Rostroconchian mollusk. Its shell-mouth grew to be across. It fed on tiny plants and animals in the water. Fossils have been found all over the world from Ordovician to Permian formations.''Conocardium'' at Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ... .org Species The following species have been described: * ''C. acadianum'' * ''C. aliforme'' ( < ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Gastrioceras ''Gastrioceras'' is a goniatitid genus in the family Gastrioceratidae that lived during the late Carboniferous (Pennsylvanian and for most of the Permian The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleoz .... Taxonomy ''Gastrioceras'' is assigned to the Gastrioceratidae, a family that makes up part of the Gastriocerataceae, known in more recent references as Gastrioceratoidea. , Morphology The ''Gastrioceras'' shell, or conch, is subdiscoidal to subglobose in form with moderate to wide umbilicus. Ornament varies according to species, varying from simple transverse lirae to reticulate produced by the addition of faint longitudinal lirae. The umbilical shoulder is nodose, nodes elongated transversely. Some species have rather strong ribs. The suture is characterized by a ventral lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Cephalopod A cephalopod is any member of the molluscan class Cephalopoda ( Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles ( muscular hydrostats) modified from the primitive molluscan foot. Fishers sometimes call cephalopods "inkfish", referring to their common ability to squirt ink. The study of cephalopods is a branch of malacology known as teuthology. Cephalopods became dominant during the Ordovician period, represented by primitive nautiloids. The class now contains two, only distantly related, extant subclasses: Coleoidea, which includes octopuses, squid, and cuttlefish; and Nautiloidea, represented by '' Nautilus'' and '' Allonautilus''. In the Coleoidea, the molluscan shell has been internalized or is absent, whereas in the Nautiloidea, the external shell remains. About 800 living species of cephalopods have been i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Spirifer ''Spirifer'' is a genus of marine brachiopods belonging to the order Spiriferida and family Spiriferidae. Species belonging to the genus lived from the Middle Ordovician ( Sandbian) through to the Middle Triassic (Carnian) with a global distribution. They were stationary epifaunal suspension feeders.''Spirifer'' at Fossilworks .org Selected species * '' Spirifer acutiplicatus'' Hayasaka, 1933 * '' Spirifer bambadhurensis'' Diener, 1903 * '' [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Schizophoria ''Schizophoria'' is an extinct genus of brachiopod belonging to the superfamily Enteletoidea. Specimens have been found in 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 ... through Permian beds in North America, Australia, central and southeast Asia, and eastern Europe. Species ''S. amanaensis'' Stainbrook, 1945 ''S. annanaensis'' Stainbrook, 1945 ''S. oklahomae'' ''S. chouteauensis'' Weller, 1914 ''S. depressa'' Easton, 1962 ''S. kintaensis'' Shi and Waterhouse, 1991 ''S. kutsingensis'' Grabau, 1932 ''S. lata'' Stainbrook, 1940 ''S. nevadaensis'' Merriam 1940 ''S. paraprima'' Johnson ''et al.'', 1973 ''S. parenteletiformis'' Huang, 1933 ''S. resupinata'' Martin, 1809 ''S. rhomboidalis'' Huang, 1933 ''S. striatula'' von Schlotheim, 1813 ''S. swallovi ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Linoproductus ''Linoproductus'' is an extinct genus of brachiopod belonging to the order Productida and family Linoproductidae. Specimens have been found in Carboniferous 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 ''Carbonifero ... to Permian beds in Asia, North America, and South America. Species ''L. antonioi'' Verna and Angiolini 2011 ''L. caima'' Chen ''et al.'' 2004 ''L. cora'' d'Orbigny 1842 ''L. delawarii'' Marcou 1858 ''L. kharaulakhensis'' Fredericks 1915 ''L. lineatus'' Waagen 1884 ''L. prattenianus'' Norwood and Pratten 1855 ''L. simensis'' Tschernyschew 1902 ''L. tenuistriatus'' de Verneuil 1845 References Paleozoic life Productida {{Brachiopod-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Juresania ''Juresania'' is an extinct genus of brachiopod that existed from the Carboniferous to the Permian.J. J. Sepkoski. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1-560 Description ''Juresania's'' members were epifaunal, meaning they lived on top of the seafloor, not buried within it, and were suspension feeders. They had small spines that cover both halves of the shell. Distribution ''Juresania'' specimens can be found in the Americas, Europe, and Asia, with most ''Juresania'' specimens having been found in the northern hemisphere The Northern Hemisphere is the half of Earth that is north of the Equator. For other planets in the Solar System, north is defined as being in the same celestial hemisphere relative to the invariable plane of the solar system as Earth's Nort .... Species Species in the genus ''Juresania'' include: ''J. dorudensis'' Fantini Sestini, 1965 ''J. grandispinosa'' Li, 1986 ''J. hispida'' Chronic, 194 ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Composita ''Composita'' is an extinct brachiopod genus that lived from the Late Devonian to the Late Permian.''Composita'' at Fossilworks .org ''Composita'' had a cosmopolitan global distribution, having lived on every continent except Antarctica . [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Brachiopod Brachiopods (), phylum Brachiopoda, are a phylum of trochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection. Two major categories are traditionally recognized, articulate and inarticulate brachiopods. The word "articulate" is used to describe the tooth-and-groove structures of the valve-hinge which is present in the articulate group, and absent from the inarticulate group. This is the leading diagnostic skeletal feature, by which the two main groups can be readily distinguished as fossils. Articulate brachiopods have toothed hinges and simple, vertically-oriented opening and closing muscles. Conversely, inarticulate brachiopods have weak, untoothed hinges and a more complex system of vertical and oblique (diagonal) muscles used to keep the two valves aligned. In many brachiopods, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]

Species

Selected species