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Tucumcari Shale
The Tucumcari Formation is a geologic formation in New Mexico. It preserves fossils dating back to the Albian Age of the early Cretaceous period. Description The formation consists of highly fossiliferous gray shale and buff calcareous sandstone with some limestone nodules. It overlies the Morrison Formation and is overlain by the Mesa Rica Sandstone. The formation is interpreted as marine shales deposited during the Kiowa-Skull Creek transgression. It is likely the lateral equivalent of the Glencairn Formation. Fossils More than 65 marine invertebrate species have been found in the Tucumcari Shale. The macrofossils are mostly bivalves, with some gastropods and ammonoids. Microfossils include ostracods, foraminiferans, and palynomorphs. Species found in the formation include the solitary corals ''Desmophyllum'' and ''Platycyathus'', the bivalves ''Scabrotrigonia'', '' Pteria'', ''Texigryphaea'', ''Botula'', and ''Lopha'', and gastropod '' Turritella''. The shells show b ... [...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] |
Glencairn Formation
The Glencairn Formation is a geologic formation found in Colorado and New Mexico. It preserves fossils characteristic of the Albian Age of the Cretaceous Period. Description The Glencairn Formation consists of dark gray shale and buff sandstone and siltstone. It disconformably overlies the Lytle Formation, underlies the Dakota Group, and varies in thickness from . The formation is present from central Colorado to the valley of the Dry Cimarron in northeastern New Mexico. The formation locally contains gypsum veins and gypsum-filled desiccation cracks. The exposures at the valley of the Dry Cimarron include a basal sandstone bed, the Long Canyon Sandstone Bed, that is up to thick, is heavily bioturbated, and contains an abundant late Albian invertebrate fossil fauna. This is interpreted as infilling of a drainage system preceding the Kiowa-Skull Creek transgression. It is likely the lateral equivalent of the Tucumcari Shale. Fossils The lower beds of the formation are heavi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clionid
The Clionidae are a family of sea angels, which are a group of pelagic marine gastropods. They resemble angels, complete with flapping "wings", hence their common name. They are gelatinous, mostly transparent pteropods, and they only have shells in their embryonic stage. They are mostly very small, with the largest species (''Clione limacina'') reaching . External anatomy The Clionidae use winglike flaps for rhythmical locomotion, as if flying in the sea. These "wings" are attached to the anterior part of the body. The posterior part is gelatinous and mostly transparent. The orange visceral sac is confined to the anterior part. Life habits Mating is carried out ventrally for mutual fertilization. The following spring, this results in a free-floating, gelatinous egg mass. Taxonomy Clionidae d'Orbigny, 1851 is unfortunately also the name of a family of sponges in the order Hadromerida, class Demospongiae. Within the ICZN there has been a proposed emendation of spelling to C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turritella
''Turritella'' is a genus of medium-sized sea snails with an operculum, marine gastropod mollusks in the family Turritellidae.Vos, C.; Gofas, S. (2013). Turritella Lamarck, 1799. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138615 on 2013-06-02 They have tightly coiled shells, whose overall shape is basically that of an elongated cone. The name ''Turritella'' comes from the Latin word ''turritus'' meaning "turreted" or "towered" and the diminutive suffix ''-ella''. Species Valid Valid species within the genus ''Turritella'' are listed below. Fossil species are marked with a dagger "†". * ''Turritella acropora'' (Dall, 1889) * '' Turritella albolapis'' Finlay, 1924 * '' Turritella algida'' Melvill & Standen, 1912 * '' Turritella anactor'' Berry, 1957 * ''Turritella annulata'' Kiener, 1843 * † '' Turritella apicalis'' - Pleistocene of Florida * ''Turritella attenuata'' Reeve, 1849 * '' Turritella aurocincta'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lopha
''Lopha'' is a genus of marine bivalve molluscs in the family Ostreidae. The genus ''Lopha'' is present from the Triassic period in the Lower Norian age (216.5 ± 2.0 – 203.6 ± 1.5 Mya) to the recent age. Description ''Lopha'' species have thick, strongly ribbed shells with unequal valves. The margins of the valves have a characteristic zig-zag pattern. The lower valve shows finger-like outgrowths, by which the molluscs adhere to the substrate. These molluscs are stationary, epifaunal, suspension feeders, as they feed by filtering sea water to extract the nutrients. Species * '' Lopha affinis'' Sowerby, 1871 * '' Lopha capsa'' Fischer von Waldheim, 1808 * '' Lopha chemnitzii'' Hanley, 1846 * '' Lopha cristagalli'' C. Linnaeus, 1758 * '' Lopha frons'' C. Linnaeus, 1758 * '' Lopha imbricata'' J. B. Lamarck, 1819 * '' Lopha rosacea'' G. P. Deshayes, 1836 Fossil species *'' Lopha gregarea'', Oxfordian (stage) (160 mya) *'' Lopha marshii'' (Sowerby, 1914), Bajocian In th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botula
''Botula'' is a genus of mussels in the family Mytilidae Mytilidae are a family of small to large marine and brackish-water bivalve molluscs in the order Mytilida. One of the genera, ''Limnoperna'', even inhabits freshwater environments. The order has only this one family which contains some 52 gen ....Abbott, R.T. & Morris, P.A. ''A Field Guide to Shells: Atlantic and Gulf Coasts and the West Indies.'' New York: Houghton Mifflin, 1995. 20. Selected species * '' Botula fusca'' (Gmelin, 1791) — cinnamon mussel References Mytilidae Bivalve genera {{Mytilidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Texigryphaea
''Texigryphaea'' is an extinct genus of oyster belonging to the order Ostreida and family Gryphaeidae. It dates to the Albian to Cenomanian Ages of the Cretaceous period and is primarily found in Texas and the southern Western Interior of North America. However, specimens have been identified from northern Spain. The genus were free-living benthic oysters that were often the dominant species in late Albian biomes of the Western Interior Seaway. Some limestone beds of the Muleros Formation near El Paso, Texas, consist almost entirely of fossil fragments of ''T. washitaensis''. Most species preferred soft substrates in quiet environments, but ''T. navia'' was adapted to firmer substrates in more energetic environments. The genus differs from Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteria (bivalve)
''Pteria'' is a genus of molluscs in the family Pteriidae.Abbott, R.T. & Morris, P.A. ''A Field Guide to Shells: Atlantic and Gulf Coasts and the West Indies.'' New York: Houghton Mifflin, 1995. 22. The species of the genus are sometimes referred to as wing-oysters or winged oysters. Selected species The World Register of Marine Species includes the following species in the genus: * '' Pteria admirabilis'' Wang, 2002 * '' Pteria aegyptiaca'' (Dillwyn, 1817) * '' Pteria atlantica'' (Lamarck, 1819) * '' Pteria avicular'' (Holten, 1802) * '' Pteria bernhardi'' (Iredale, 1939) * '' Pteria broomei'' Huber, 2010 * '' Pteria brunnea'' (Pease, 1863) * '' Pteria bulliformis'' Wang, 2002 * '' Pteria colymbus'' (Roding, 1798) — Atlantic wing-oyster * '' Pteria cooki'' Lamprell & Healy, 1997 * '' Pteria dendronephthya'' Habe, 1960 * '' Pteria fibrosa'' (Reeve, 1857) * '' Pteria formosa'' (Reeve, 1857) * '' Pteria gregata'' (Reeve, 1857) * '' Pteria heteroptera'' (Lamarck, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scabrotrigonia
''Pterotrigonia'' is an extinct genus of saltwater clams, marine bivalve molluscs in the family Megatrigoniidae. This genus is known in the fossil record from the Jurassic period Tithonian age to the Cretaceous period Maastrichtian age. Species in this genus were facultatively mobile infaunal suspension feeders. The type species of the genus is ''Pterotrigonia cristata''. ''Pterotrigonia thoracica,'' was selected as the state fossil of Tennessee in 1998. ''Scabrotrigonia'' is a subgenus of ''Pterotrigonia''. Distribution Fossils of species within this genus have been found in the Jurassic of Antarctica, Chile and India, as well as in the Cretaceous of Angola, Antarctica, Argentina, Austria, Chile, Colombia, Cuba, Ecuador, Egypt, France, Hungary, Italy, Japan, Libya, Madagascar, Mexico, Mozambique, New Zealand, Oman, Peru, Portugal, Serbia and Montenegro, South Africa, Spain, Trinidad and Tobago, Russia, Ukraine, United Arab Emirates, United Kingdom, United States and Yemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platycyathus
''Trochocyathus'' is a genus of corals in the family Caryophylliidae. Living species are found in waters near Hawai'i at depths of . Fossil species are found as far back as the latest Paleocene in the Dilwyn Formation of Australia, in the late Cretaceous in the Woodbury Formation of New Jersey, and in Suffolk Suffolk () is a ceremonial county of England in East Anglia. It borders Norfolk to the north, Cambridgeshire to the west and Essex to the south; the North Sea lies to the east. The county town is Ipswich; other important towns include Lowes .... ''Platycyathus'' is sometimes regarded as a subgenus within ''Trochocyathus.'' Species * '' Trochocyathus aithoseptatus'' Cairns, 1984 * '' Trochocyathus anglicus'' Duncan, 1872 * '' Trochocyathus balanophylloides'' Bolsche, 1870 * '' Trochocyathus burchae'' Cairns, 1984 * '' Trochocyathus gardineri'' Vaughan, 1907 * '' Trochocyathus mauiensis'' Vaughan, 1907 * '' Trochocyathus oahensis'' Vaughan, 1907 * '' Trochocyathus p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desmophyllum
''Desmophyllum'' is a genus of cnidarians belonging to the family Caryophylliidae The Caryophylliidae are a family of stony corals found from the tropics to temperate seas, and from shallow to very deep water. Genera *'' Africana'' Ocana & Brito, 2015 *'' Anomocora'' Studer, 1878 *'' Asterosmilia'' Duncan, 1867 *'' Auloc .... The genus has cosmopolitan distribution. Species Species: *'' Desmophyllum affine'' *'' Desmophyllum antiquatum'' *'' Desmophyllum cantamessi'' *'' Desmophyllum castellolense'' *'' Desmophyllum clavatum'' *'' Desmophyllum compressum'' *'' Desmophyllum conulatum'' *'' Desmophyllum coulsoni'' *'' Desmophyllum crassum'' *'' Desmophyllum cylindraceum'' *'' Desmophyllum decuplum'' *'' Desmophyllum defrancei'' *'' Desmophyllum dianthus'' *'' Desmophyllum edwardsianum'' *'' Desmophyllum ehrenbergianum'' *'' Desmophyllum elegans'' *'' Desmophyllum exclavatum'' *'' Desmophyllum fungiaeforme'' *'' Desmophyllum gracile'' *'' Desmophyllum hou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foraminiferan
Foraminifera (; Latin for "hole bearers"; informally called "forams") are single-celled organisms, members of a phylum or class of amoeboid protists characterized by streaming granular ectoplasm for catching food and other uses; and commonly an external shell (called a "test") of diverse forms and materials. Tests of chitin (found in some simple genera, and Textularia in particular) are believed to be the most primitive type. Most foraminifera are marine, the majority of which live on or within the seafloor sediment (i.e., are benthic), while a smaller number float in the water column at various depths (i.e., are planktonic), which belong to the suborder Globigerinina. Fewer are known from freshwater or brackish conditions, and some very few (nonaquatic) soil species have been identified through molecular analysis of small subunit ribosomal DNA. Foraminifera typically produce a test, or shell, which can have either one or multiple chambers, some becoming quite elaborate in struc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
