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Luxembourg Sandstone
The Luxembourg Sandstone (French: Grès de Luxembourg) is a geologic formation in Luxembourg. It exists along the eastern margin of the Paris Basin. Sandstone units continuous with the Luxembourg Sandstone also occur in France. It is Early Jurassic in age. It predominantly outcrops in a belt extending through south-central Luxembourg. It up to 100 metres thick and predominantly consists of carbonaceous poorly cemented sandstone and sandy limestone Fossil content Among others, the following fossils were reported from the formation:Luxembourg Sandstone at Fossilworks.org ;Reptiles * '' [...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] |
Theropoda
Theropoda (; ), whose members are known as theropods, is a dinosaur clade that is characterized by hollow bones and three toes and claws on each limb. Theropods are generally classed as a group of saurischian dinosaurs. They were ancestrally carnivorous, although a number of theropod groups evolved to become herbivores and omnivores. Theropods first appeared during the Carnian age of the late Triassic Period (geology), period 231.4 million years ago (Year#SI prefix multipliers, Ma) and included all the large terrestrial carnivores from the Early Jurassic until at least the close of the Cretaceous, about 66 Ma. In the Jurassic, birds evolved from small specialized coelurosaurian theropods, and are today represented by about 10,500 living species. Biology Diet and teeth Theropods exhibit a wide range of diets, from insectivores to herbivores and carnivores. Strict carnivory has always been considered the ancestral diet for theropods as a group, and a wider variety of di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinemurian Stage
In the geologic timescale, the Sinemurian is an age and stage in the Early or Lower Jurassic Epoch or Series. It spans the time between 199.3 ± 2 Ma and 190.8 ± 1.5 Ma (million years ago). The Sinemurian is preceded by the Hettangian and is followed by the Pliensbachian. In Europe the Sinemurian age, together with the Hettangian age, saw the deposition of the lower Lias, in Great Britain known as the Blue Lias. Stratigraphic definitions The Sinemurian Stage was defined and introduced into scientific literature by French palaeontologist Alcide d'Orbigny in 1842. It takes its name from the French town of Semur-en-Auxois, near Dijon. The calcareous soil formed from the Jurassic limestone of the region is in part responsible for the character of the classic Sancerre wines. The base of the Sinemurian Stage is at the first appearance of the ammonite genera ''Vermiceras'' and '' Metophioceras'' in the stratigraphic record. A global reference profile ( GSSP or golden spike) for t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hettangian Stage
The Hettangian is the earliest age and lowest stage of the Jurassic Period of the geologic timescale. It spans the time between 201.3 ± 0.2 Ma and 199.3 ± 0.3 Ma (million years ago). The Hettangian follows the Rhaetian (part of the Triassic Period) and is followed by the Sinemurian. In European stratigraphy the Hettangian is a part of the time span in which the Lias was deposited. An example is the British Blue Lias, which has an upper Rhaetian to Sinemurian age. Another example is the lower Lias from the Northern Limestone Alps where well-preserved but very rare ammonites, including Alsatites, have been found. Stratigraphic definitions The Hettangian was introduced in the literature by Swiss palaeontologist, Eugène Renevier, in 1864. The stage takes its name from Hettange-Grande, a town in north-eastern France, just south of the border with Luxembourg on the main road from Luxembourg City to Metz. The base of the Hettangian Stage (which is also the base of the Lower Jurass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Jurassic Europe
{{disambiguation, geo ...
Early may refer to: History * The beginning or oldest part of a defined historical period, as opposed to middle or late periods, e.g.: ** Early Christianity ** Early modern Europe Places in the United States * Early, Iowa * Early, Texas * Early Branch, a stream in Missouri * Early County, Georgia Other uses * ''Early'' (Scritti Politti album), 2005 * ''Early'' (A Certain Ratio album), 2002 * Early (name) * Early effect, an effect in transistor physics * Early Records, a record label * the early part of the morning See also * Earley (other) Earley is a town in England. Earley may also refer to: * Earley (surname), a list of people with the surname Earley * Earley (given name), a variant of the given name Earlene * Earley Lake, a lake in Minnesota *Earley parser, an algorithm *Earley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jurassic System Of Europe
The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of the Mesozoic Era and is named after the Jura Mountains, where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic Magmatic Province. The beginning of the Toarcian Stage started around 183 million years ago and is marked by an extinction event associated with widespread oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and is the only boundary between geological periods to remain formally undefined. By the beginning of the Jurassic, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Luxembourg
The geology of Luxembourg is divided into two geologic regions: Rheinisches Schiefergeblige in the north, extending into the Ardennes region in Belgium, and the Oesling (also known as Islek) Zone to the north of Ettelbruck. The country is underlain by the Hercynian orogeny related Givonne Anticlinorium, which mainly contains Early Devonian sandstone and shale. Rocks closer to the surface are primarily from the Cretaceous and are cut by the Sauer River and its tributaries. Geologists draw parallels between the Gutland Zone, south of the Hercynian fold belt, and the Lorraine region of France. This "schichstufen" plateau and scarp landscape is made up of gently dipping Triassic red beds and Jurassic limestone and shale. Middle Jurassic rocks contain sedimentary iron ore. These Mesozoic rocks in the center of the country are sometimes referred to as the Luxembourg Gulf and are cut by small river valleys. The sedimentary and metamorphic rocks in the country are 6.2 kilometers thick, wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In Luxembourg
See also * Lists of fossiliferous stratigraphic units in Europe These lists of fossiliferous stratigraphic units in Europe enumerate the rock layers which preserve the fossilized remains of ancient life in Europe by the modern countries wherein they are found. Graphical atlas ... References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Luxembourg Luxembourg Geology of Luxembourg Paleontology in Luxembourg Fossiliferous stratigraphic units ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trochotoma
''Trochotoma'' is a genus of large sea snails, marine gastropod mollusks in the family Pleurotomariidae, the slit snails.Bouchet, P. (2013). ''Trochotoma'' Eudes-Deslongchamps, 1842. Accessed through: World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific specialist ... at http://www.marinespecies.org/aphia.php?p=taxdetails&id=719303 on 2013-02-16 Species The following species were brought into synonymy: *''Trochotoma crossei'' de Folin, 1869: synonym of '' Sinezona cingulata'' (O. G. Costa, 1861) References External links To World Register of Marine Species Pleurotomariidae Monotypic gastropod genera {{Pleurotomariidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurotomaria
''Pleurotomaria'' is an extinct genus of sea snails, marine gastropod molluscs in the family Pleurotomariidae. Species With current taxonomic changes the genus ''Pleurotomaria'' has been reserved exclusively for fossil species (denoted with † below). Known fossil species of ''Pleurotomaria'' include: * † ''Pleurotomaria agarista'' Billings, 1865 * † ''Pleurotomaria anglica'' (Sowerby, 1818) (synonym: ''Trochus anglicus'') * † ''Pleurotomaria angulosa'' d'Orbigny, 1842 * † ''Pleurotomaria antitorquata'' Münster, 1840 * † ''Pleurotomaria arctica'' Toula, 1875 * † ''Pleurotomaria arenaria'' Girty, 1908 * † ''Pleurotomaria awakinoensis'' Begg and Grant-Mackie, 2003 * † ''Pleurotomaria barrealensis'' (Cowper Reed, 1927) (synonym: ''Neoplatyteichum barrealensis'') * † ''Pleurotomaria bicoronata'' Sandberger and Sandberger, 1855 * † ''Pleurotomaria biondii'' Gemmellaro, 1889 * † ''Pleurotomaria bodana'' Roemer, 1855 * † ''Pleurotomaria brennensis'' Reed, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
