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Pseudopolycentropodidae
Pseudopolycentropodidae is an extinct family of scorpionflies known from the Mesozoic. Fossils are known from the Middle Triassic (Anisian) to the early Late Cretaceous (Cenomanian). It is part of Mesopsychoidea, a group of scorpionflies with siphonate proboscis. They are suggested to have been nectarivores, feeding off the liquid pollination drops and acting as pollinators for now extinct insect pollinated gymnosperms such as Bennettitales. Systematics * '' Dualula'' Lin et al. 2019 **''Dualula kachinensis'' Lin et al. 2019 Burmese amber, mid Cretacoeus (Albian-Cenomanian) * '' Parapolycentropus'' Grimaldi and Rasnitsyn 2005 Burmese amber **''Parapolycentropus burmiticus'' Grimaldi and Rasnitsyn 2005 **''Parapolycentropus paraburmiticus'' Grimaldi and Rasnitsyn 2005 * '' Pseudopolycentropodes'' Grimaldi and Fraser 2005 **''Pseudopolycentropodes virginicus'' Grimaldi and Fraser 2005 Cow Branch Formation, Virginia, Late Triassic (Norian) * '' Pseudopolycentropus'' Handlir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cow Branch Formation
The Cow Branch Formation is a Late Triassic geologic Formation (geology), formation in Virginia and North Carolina in the eastern United States. The formation consists of Cyclostratigraphy, cyclical beds of black and grey Lacustrine deposits, lacustrine (lake) mudstone and shale. It is a ''Lagerstätte, konservat-lagerstätte'' renowned for its exceptionally preserved insect fossils, along with small reptiles,'''' fish, and plants. Dinosaur tracks have also been reported from the formation.Weishampel et al., 2004, pp.517-607 Geology Regional setting The Cow Branch Formation is exposed in the Dan River-Danville Basin, a narrow half-graben which extends across the border of Virginia and North Carolina in the eastern United States. The basin has also been termed the Danville Basin (emphasizing the northern portion in Virginia) or the Dan River Basin (emphasizing the southern portion, in North Carolina). It is one of many Triassic-Jurassic Rift, rift basins stretching from northeas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grès à Voltzia
The Grès à Voltzia is a geologic formation in France. It preserves fossils dating back to the Triassic period, more specifically the Anisian stage of the Middle Triassic epoch. It represents a lagerstatte that is well known for its palaeoflora, which shares numerous similarities with palaeobotanical assemblages in the Iberian Peninsula. See also * List of fossiliferous stratigraphic units in France See also * Lists of fossiliferous stratigraphic units in Europe These lists of fossiliferous stratigraphic units in Europe enumerate the Stratigraphy, rock layers which preserve the fossilized remains of ancient life in Europe by the modern ... References * Triassic France Triassic System of Europe Anisian Stage {{Triassic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinemurian
In the geologic timescale, the Sinemurian is an age (geology), age and stage (stratigraphy), stage in the Early Jurassic, Early or Lower Jurassic epoch (geology), Epoch or series (stratigraphy), Series. It spans the time between 199.5 ±0.3 annum, Ma and 192.9 ±0.3 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 Group, 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 (wine), Sancerre wines. The base of the Sinemurian Stage is at the first appearance of the ammonite genu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charmouth Mudstone Formation
The Charmouth Mudstone Formation is a Formation (geology), geological formation in England, dating to the Early Jurassic (Sinemurian–Pliensbachian). It forms part of the lower Lias Group. It is most prominently exposed at its type locality in cliff section between Lyme Regis and Charmouth (alongside the underlying Blue Lias) but onshore it extends northwards to Market Weighton, Yorkshire, and in the Bedrock, subsurface of the East Midlands Shelf and Wessex Basin. The formation is notable for its fossils, including those of ammonites and marine reptiles and rare dinosaur remains. The formation played a prominent role in the history of early paleontology, with its Lyme Regis-Charmouth exposure being frequented by fossil collectors including Mary Anning. Stratigraphy Shales With Beef Member The Shales With Beef Member is around 28–30 metres thick in the Lyme Regis-Charmouth region and predominantly consists of thinly bedded medium to dark grey mudstone, blocky calcareous pale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ciechocinek Formation
The Ciechocinek Formation (also known as the Gryfice Formation at Suliszewo, Choszczno County, Suliszewo) is a Jurassic (lower Toarcian) geological formation extending across the Baltic coast, primarily in Poland, with minor occurrences in Lithuania and Kaliningrad Oblast, Kaliningrad. It represents one of the largest deltaic systems in the fossil record, covering approximately 7.1 × 100,000 km² in the Polish realm. Deposited in a brackish-marine embayment within the eastern arm of the Mid-European Toarcian Basin, it is a sister unit to the Grimmen Formation, the Sorthat Formation (Bornholm) and Lava Formation (Lithuania), with interfingering relationships with the Posidonia Shale in western regions. Its main equivalents include the Posidonia Shale, upper Rya Formation, Rydeback Member (Rya Formation, southern Sweden), Fjerritslev Formation (Danish Basin), Sorthat Formation, and Lava Formation. Informal units in Poland, such as the Gryfice Beds (now fused with the Ciechocinek, Po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toarcian
The Toarcian is, in the International Commission on Stratigraphy, ICS' geologic timescale, an age (geology), age and stage (stratigraphy), stage in the Early Jurassic, Early or Lower Jurassic. It spans the time between 184.2 Megaannum, Ma (million years ago) and 174.7 ±0.8 Ma. It follows the Pliensbachian and is followed by the Aalenian. The Toarcian Age began with the Toarcian Oceanic Anoxic Event, a major anoxic event associated with marine extinctions and increased global temperatures that sets its fossil faunas apart from the previous Pliensbachian age. It is believed to have ended with a global cooling event known as the Comptum Cooling Event, although whether it represented a worldwide event is controversial. Stratigraphic definitions The Toarcian takes its name from the city of Thouars, just south of Saumur in the Loire Valley of France. The stage was introduced by French palaeontologist Alcide d'Orbigny in 1842, after examining stratum, rock strata of this age in a quar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Posidonia Shale
The Posidonia Shale (, also called Schistes Bitumineux in Luxembourg) geologically known as the Sachrang Formation, is an Early Jurassic (Early to Late Toarcian) geological formation in Germany, northern Switzerland, northwestern Austria, southern Luxembourg and the Netherlands, including exceptionally well-preserved complete skeletons of fossil marine fish and reptiles. The ''Posidonienschiefer'', the German translation, takes its name from the ubiquitous fossils of the oyster-related bivalve ''" Posidonia bronni"'' (synonym of '' Bositra buchii'' and '' Steinmannia bronni'') that characterize the mollusk faunal component of the formation. The name Posidonia Shale has been used for more than a century, until revisions in 2016 proposed the Sachrang Formation as new name for the Germanic unit, in a same way Altmühltal Formation is the official name of the Solnhofen Limestone. The Posidonia Shales where stablished as a valid vulgar name for this regions lower Toarcian Black Shales ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carnian
The Carnian (less commonly, Karnian) is the lowermost stage (stratigraphy), stage of the Upper Triassic series (stratigraphy), Series (or earliest age (geology), age of the Late Triassic Epoch (reference date), Epoch). It lasted from 237 to 227.3 megaannum, million years ago (Ma). The Carnian is preceded by the Ladinian and is followed by the Norian. Its boundaries are not characterized by major extinctions or biotic turnovers, but a climatic event (known as the Carnian pluvial episode characterized by substantial rainfall) occurred during the Carnian and seems to be associated with important extinctions or biotic radiations. Another extinction occurred at the Carnian-Norian boundary, ending the Carnian age. Stratigraphic definitions The Carnian was named in 1869 by Johann August Georg Edmund Mojsisovics von Mojsvar, Mojsisovics. It is unclear if it was named after the Carnic Alps or after the Austrian region of Carinthia (state), Carinthia (''Kärnten'' in German) or after th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madygen Formation
The Madygen Formation (Russian language, Russian: Madygen Svita) is a Middle Triassic, Middle–Late Triassic (Ladinian–Carnian) geologic formation and lagerstätte in the Batken Region, Batken and Osh Regions of western Kyrgyzstan, with minor outcrops in neighboring Tajikistan and Uzbekistan. The conglomerate (geology), conglomerates, sandstones and mudstones of the thick formation were deposited in terrestrial lacustrine, alluvial, fluvial and river delta, deltaic depositional environment, environments. The formation, extending across the Fergana Valley and Fergana Range, is unique for Central Asia, as it represents one of the few known continental deposits and the Madygen Formation is renowned for the preservation of more than 20,000 fossil insects, making it one of the richest Triassic lagerstätten in the world. Other vertebrate fossils as fish, amphibians, reptiles and synapsids have been recovered from the formation too, as well as minor fossil flora. The lake sediments ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxfordian (stage)
The Oxfordian is, in the International Commission on Stratigraphy, ICS' geologic timescale, the earliest age (geology), age of the Late Jurassic epoch (geology), Epoch, or the lowest stage (stratigraphy), stage of the Upper Jurassic series (stratigraphy), Series. It spans the time between 161.5 ± 1.0 Annum#SI prefix multipliers, Ma and 154.8 ± 0.8 Ma (million years ago). The Oxfordian is preceded by the Callovian and is followed by the Kimmeridgian. Stratigraphic definitions The Oxfordian Stage was called "Clunch Clay and Shale" by William Smith (1815–1816); in 1818 W. Buckland described them under the unwieldy title "Oxford, Forest or Fen Clay". The term Oxfordian was introduced by Alcide d'Orbigny in 1844. The name is derived from the English city of Oxford, where the beds are well developed, but they crop out almost continuously from Dorset to the coast of Yorkshire, generally forming low, broad valleys. They are well exposed at Weymouth, Dorset, Weymouth, Oxford, Bedfor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karabastau Formation
The Karabastau Formation () is a geological formation and lagerstätte in the Karatau Mountains of southern Kazakhstan whose strata date to the Middle to Late Jurassic. It is an important locality for insect fossils that has been studied since the early 20th century, alongside the rarer remains of vertebrates, including pterosaurs, salamanders, lizards and crocodiles.Barrett, P.M., Butler, R.J., Edwards, N.P., & Milner, A.R. Pterosaur distribution in time and space: an atlas. p61-107. in Flugsaurier: Pterosaur papers in honour of Peter Wellnhofer. 2008. Hone, D.W.E., and Buffetaut, E. (eds). Zitteliana B, 28. 264p/ref> Lithology and depositional environment The primary lithology consists of 1 mm thick varve laminations of claystone, with a dark part and a light dolomitic part, which probably correspond to a wet and dry season respectively, alongside rare, several cm thick sandstone interbeds. These were deposited within an ancient freshwater paleolake, that given the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
