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Nugget Sandstone
The Nugget Sandstone is a Late Triassic to Early Jurassic geologic Formation (geology), formation that outcrops in Colorado, Idaho and Utah, western United States. Fossil theropod tracks have been reported from the formation.Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607. Fossil content Intermediate theropod, sphenosuchian, drepanosaurid and sphenodontian remains are known.B. B. Britt, D. J. Chure, G. F. Engelmann and J. D. Shumway. 2016. Rise of the erg—paleontology and paleoenvironments of the Triassic-Jurassic transition in northeastern Utah. Geology of the Intermountain West 3:1-32 ;Other fossils * ''Rhynchosauroides, Rhynchosauroides sp.'' * Lepidosauria, Lepidosauria indet. Ichnofossils * ''Batrachopus (reptile), Batrachopus sp.'' * ''Brachychirotherium, Brachychirotherium sp.'' * ''Brasilichnium, Brasilichnium sp.'' * ''Cochlichnus, Cochlichnus sp.'' * ''Diplichnites, Diplichnites sp.'' * ''Grallator, Grallator (Eubrontes)'' * ''Gwyneddichnium, G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Jurassic
The Early Jurassic Epoch (geology), Epoch (in chronostratigraphy corresponding to the Lower Jurassic series (stratigraphy), Series) is the earliest of three epochs of the Jurassic Period. The Early Jurassic starts immediately after the Triassic-Jurassic extinction event, 201.3 Ma (million years ago), and ends at the start of the Middle Jurassic 174.1 Ma. Certain rocks of marine origin of this age in Europe are called "Lias Group, Lias" and that name was used for the period, as well, in 19th-century geology. In southern Germany rocks of this age are called Black Jurassic. Origin of the name Lias There are two possible origins for the name Lias: the first reason is it was taken by a geologist from an England, English quarryman's dialect pronunciation of the word "layers"; secondly, sloops from north Cornwall, Cornish ports such as Bude would sail across the Bristol Channel to the Vale of Glamorgan to load up with rock from coastal limestone quarries (lias limestone from S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diplichnites
''Diplichnites'' are arthropod trackways with two parallel rows of blunt to elongate, closely spaced tracks oriented approximately perpendicularly to the mid-line of the trackway. The term is more often used for the ichnofossils of this description; however, similar trackways from recent arthropods are sometimes given this name as well. The ''Diplichnites'' makers This type of trackway was originally based on large fossils from Pennsylvanian strata of Nova Scotia, when Sir J. W. Dawson named it in 1873. Dawson proposed that ''Diplichnites'' were produced by a fish “walking” in shallow water on pectoral or ventral fin spines. Previous to this he had suggested that a large crustacean, annelid worm or myriapod (such as a millipede) could have made them. Subsequent evidence has supported this earlier interpretation. The fossils on which this ichnotaxon was based are now thought to be from giant myriapods, such as ''Arthropleura''. The Scottish ''Diplichnites cuithensis'' cou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brasilichnium
''Brasilichnium'' is the name of fossilised mammaliamorph footprints dating from the Jurassic and Cretaceous. They have been identified from Brazil and western North America. ''Brasilichnium'' is the name of the footprints, identified by their shape, and not of the genus or genera that made them, which is as yet unknown but was likely a mammaliamorph with a semi-erect leg posture. Mammaliamorphs were ancestors of modern mammals. See also * List of dinosaur ichnogenera This list of dinosaur ichnogenera is a comprehensive listing of all ichnogenera that have been attributed to dinosaurs, excluding class Aves ( birds, both living and those known only from fossils) and purely vernacular terms. The list includes a ... Notes Trace fossils Fossil trackways Vertebrate trace fossils {{trace-fossil-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brachychirotherium
''Brachychirotherium'' is an ichnogenus, a form taxon based on footprints. It is a type of chirothere ('hand beast'), a term referring to the footprints of five-toed Triassic reptiles with a short fifth digit, leaving an appearance similar to a reverse human hand print. ''Brachychirotherium'' was first characterized from fossils found in Triassic beds in Germany, but has since been found in France, South Africa, Argentina, Peru, Bolivia, and North America. Description Front (manus) and rear (pes) footprints are distinguishable, though manus prints are not always preserved. The pes prints show five toes, which are proportionally shorter and stubbier than those of other chirotheres. Digit III is the longest, followed by digits II and IV, though they are all of a similar length. Digit I is notably shorter, and the impression of digit V is reduced to an oval pad at the sole. The manus prints likewise show up to five short digits, with the pad of digit V separate from the rest. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batrachopus (reptile) ''
{{Genus disambiguation ...
''Batrachopus'' may refer to: * ''Batrachopus'' (reptile), an ichnogenus of crocodylomorph tracks * ''Batrachopus'', a genus of grasshoppers in the family Romaleidae, synonym of ''Antandrus'' * ''Batrachopus'', a genus of fishes in the family Antennariidae, synonym of ''Histrio The sargassum fish, anglerfish, or frog fish (''Histrio histrio'') is a frogfish of the family Antennariidae, the only species in its genus. It lives among ''Sargassum'' seaweed which floats in subtropical oceans. The scientific name comes f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepidosauria
The Lepidosauria (, from Greek meaning ''scaled lizards'') is a subclass or superorder of reptiles, containing the orders Squamata and Rhynchocephalia. Squamata includes snakes, lizards, and amphisbaenians. Squamata contains over 9,000 species, making it by far the most species-rich and diverse order of reptiles in the present day. Rhynchocephalia was a formerly widespread and diverse group of reptiles in the Mesozoic Era. However, it is represented by only one living species: the tuatara (''Sphenodon punctatus),'' a superficially lizard-like reptile native to New Zealand. Lepidosauria is a monophyletic group (i.e. a clade), containing all descendants of the last common ancestor of squamates and rhynchocephalians. Lepidosaurs can be distinguished from other reptiles via several traits, such as large keratinous scales which may overlap one another. Purely in the context of modern taxa, Lepidosauria can be considered the sister taxon to Archosauria, which includes Aves (bird ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhynchosauroides
''Rhynchosauroides'' is an ichnogenus, a form taxon based on footprints. The organism producing the footprints was likely a lepidosaur and may have been a sphenodont, an ancestor of the modern tuatara. The footprint consists of five digits, of which the fifth is shortened and the first highly shortened. Species *''R. beasleyi'' Nopsca, 1923 *''R. bornemanni'' Haubold, 1966 *''R. brunswickii'' Ryan and Willard, 1947 *''R. gangresci'' da Silva ''et al.'', 2012 *''R. hyperbates'' Baird, 1957 *''R. kuletae'' Baird, 1957 *''R. majus'' Demathieu, 1967 *''R. maximus'' Gand, 1974 *''R. minutipes'' Maidwell, 1914 *''R. pallinii'' Conti ''et al.', 1977 *''R. palmatus'' Lull, 1942 *''R. petri'' Demathieu, 1966 *''R. pusillus'' Haubold, 1966 *''R. rdzaneki'' Ptaszynski, 2000 *''R. rectipes'' Beasley, 1911 *''R. retroversipes'' da Silva ''et al.'', 2008 *''R. santanderensis'' Demathieu and Saiz de Omeñaca, 1977 *''R. schochardti'' von Lilienstern, 1939 *''R. sphaerodactylus'' Demathieu, 197 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterosaur
Pterosaurs (; from Greek ''pteron'' and ''sauros'', meaning "wing lizard") is an extinct clade of flying reptiles in the order, Pterosauria. They existed during most of the Mesozoic: from the Late Triassic to the end of the Cretaceous (228 to 66 million years ago). Pterosaurs are the earliest vertebrates known to have evolved powered flight. Their wings were formed by a membrane of skin, muscle, and other tissues stretching from the ankles to a dramatically lengthened fourth finger. There were two major types of pterosaurs. Basal pterosaurs (also called 'non-pterodactyloid pterosaurs' or 'rhamphorhynchoids') were smaller animals with fully toothed jaws and, typically, long tails. Their wide wing membranes probably included and connected the hind legs. On the ground, they would have had an awkward sprawling posture, but the anatomy of their joints and strong claws would have made them effective climbers, and some may have even lived in trees. Basal pterosaurs were i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dimorphodontia
Dimorphodontidae (or dimorphodontids) is a group of early "rhamphorhynchoid" pterosaurs named after ''Dimorphodon'', that lived in the Late Triassic to Early Jurassic. While fossils that can be definitively referred to the group are rare, dimorphodontids may have had a broad distribution, with fossils known from the UK, the southwest United States, and possibly Antarctica. Dimorphodontidae was named in 1870 by Harry Govier Seeley (as "Dimorphodontae") with ''Dimorphodon'' as the only known member. In 2003, David Unwin defined a clade Dimorphodontidae, as the group consisting of the last common ancestor of ''Dimorphodon macronyx'' and ''Peteinosaurus zambellii'', and all its descendants.Unwin, D. M. 2003. "On the phylogeny and evolutionary history of pterosaurs". In: Buffetaut, E. & Mazin, J.-M. (eds), ''Evolution and Palaeobiology of Pterosaurs''. Geological Society, London, Special Publications 217: 139-190 However, later studies found that ''Dimorphodon'' may not be closely rela ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caelestiventus
''Caelestiventus'' ( , meaning "heavenly wind") is a pterosaur genus from the Late Triassic (Norian or Rhaetian) found in western North America. The type species, ''Caelestiventus hanseni'', honors Robin Hansen, the Bureau of Land Management geologist ( BLM), who facilitated access to the excavation site. ''Caelestiventus'' is important because it is the sole example of a desert-dwelling non-pterodactyloid pterosaur and is 65 million years older than other known desert-dwelling pterosaurs. Additionally, it shows that even the earliest pterosaurs were morphologically and ecologically diverse and that the Dimorphodontidae originated in the Triassic period. Discovery ''Caelestiventus'' was recovered from the Saints & Sinners Quarry of northeastern Utah. The site was discovered in 2007 by Dan Chure and George Engelmann while working on the geology and paleontology of the fossilized dunes of the Nugget Sandstone. In 2015 the discovery of ''Caelestiventus'' was reported in the scientif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
