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New Oxford Formation
The New Oxford Formation is a mapped bedrock unit consisting primarily of sandstones, conglomerates, and shales. The New Oxford Formation was first described in Adams County, Pennsylvania in 1929, and over the following decade was mapped in adjacent York County, PennsylvaniaStose, G.W., and Jonas, A.I., 1939, Geology and mineral resources of York County, Pennsylvania: Pennsylvania Geological Survey County Report, 4th series, no. 67, 199 p. and Frederick County, Maryland.Jonas, A.I., and Stose, G.W., 1938, Geologic map of Frederick County and adjacent parts of Washington and Carroll Counties (Maryland): Maryland Geological Survey County Geologic Map, 1 sheet, scale 1:62,500 It was described as "red shale and sandstone with beds of micaceous sandstone, arkose, and conglomerate." The majority of this early mapping was done by George Willis Stose, Anna Isabel Jonas, and Florence Bascom. Depositional Environment The New Oxford Formation and other formations of the Newark Supergroup we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
York County, Pennsylvania
York County ( Pennsylvania Dutch: Yarrick Kaundi) is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 456,438. Its county seat is York. The county was created on August 19, 1749, from part of Lancaster County and named either after the Duke of York, an early patron of the Penn family, or for the city and county of York in England. York County comprises the York-Hanover, Pennsylvania Metropolitan Statistical Area, which is also included in the Harrisburg-York-Lebanon, Pennsylvania Combined Statistical Area. It is in the Susquehanna Valley, a large fertile agricultural region in South Central Pennsylvania. Based on the Articles of Confederation having been adopted in York by the Second Continental Congress on November 15, 1777, the local government and business community began referring to York in the 1960s as the first capital of the United States of America. The designation has been debated by historians ever since. Congress cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrapod
Tetrapods (; ) are four-limbed vertebrate animals constituting the superclass Tetrapoda (). It includes extant and extinct amphibians, sauropsids ( reptiles, including dinosaurs and therefore birds) and synapsids (pelycosaurs, extinct therapsids and all extant mammals). Tetrapods evolved from a clade of primitive semiaquatic animals known as the Tetrapodomorpha which, in turn, evolved from ancient lobe-finned fish (sarcopterygians) around 390 million years ago in the Middle Devonian period; their forms were transitional between lobe-finned fishes and true four-limbed tetrapods. Limbed vertebrates (tetrapods in the broad sense of the word) are first known from Middle Devonian trackways, and body fossils became common near the end of the Late Devonian but these were all aquatic. The first crown-tetrapods (last common ancestors of extant tetrapods capable of terrestrial locomotion) appeared by the very early Carboniferous, 350 million years ago. The specific aquatic ancestors ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeoctonus
''Palaeoctonus'' is an extinct genus of archosaur (possibly phytosaur) known only from isolated teeth. The name is derived from Greek (''palaios'' meaning "ancient", -''ktonos'' meaning "killer"). The genus is believed to have flourished during the Upper (Late) Triassic The Triassic ( ) is a geologic period and system (stratigraphy), system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago (Year#Abbreviations yr and ya, Mya), to the beginning of the Jurassic Period 201.36 ... period. External links list of dinosaur namessupplementary information Phytosaurs Late Triassic reptiles of North America Prehistoric reptile genera Taxa named by Edward Drinker Cope {{paleo-archosaur-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otozoum
''Otozoum'' ("giant animal") is an extinct ichnospecies of fossilized sauropodomorph dinosaur footprints and other markings in sandstones. They were made by heavy, bipedal animals (probably dinosaurs) with a short stride that walked on four toes directed forward. ''Otozoum'' tracks were discovered by American paleontologist Edward Hitchcock, who described ''Otozoum'' as the "most extraordinary track yet brought to light in this valley Connecticut_River.html" ;"title="he Connecticut River">he Connecticut Riverrepresenting a bipedal animal... distinguished from all others... in the sandstone of New England". The ichnogenus was named by him in 1847, after the giant Otus (mythology), Otus.Hitchcock, Edward, 1847, "Description of two new species of fossil footmarks found in Massachusetts and Connecticut, or of the animals that made them", ''American Journal of Science and Arts Series 2'', 4(3): 46-57 In 1953, Yale University paleontologist Richard Swann Lull revised Hitchcock's work, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metoposauridae
Metoposauridae is an extinct family of trematosaurian temnospondyls. The family is known from the Triassic period. Most members are large, approximately long and could reach 3 m long.Brusatte, S. L., Butler R. J., Mateus O., & Steyer S. J. (2015). A new species of Metoposaurus from the Late Triassic of Portugal and comments on the systematics and biogeography of metoposaurid temnospondyls. Journal of Vertebrate Paleontology. e912988., 2015: Metoposaurids can be distinguished from the very similar mastodonsauroids by the position of their eyes, placed far forward on the snout. Taphonomy Several mass accumulations of metoposaurid fossils are known from the southwestern United States and Morocco. These have often been interpreted as the result of mass deaths from droughts. Many individuals would have died in one area, creating a dense bone bed once fossilized. These mass accumulations of metoposaurids are often dominated by one taxa, such as '' Anaschisma'' or '' Metoposaurus''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grallator
''Grallator'' GRA-luh-tor"is an ichnogenus (form taxon based on footprints) which covers a common type of small, three-toed print made by a variety of bipedal theropod dinosaurs. ''Grallator''-type footprints have been found in formations dating from the Early Triassic through to the early Cretaceous periods. They are found in the United States, Canada, Europe, Australia, Brazil ( Sousa and Santa Maria Formations) and China,''Grallator'' at Fossilworks.org but are most abundant on the east coast of North America, especially the Triassic and Early Jurassic formations of the northern part of the Newark Supergroup.Weishampel, D.B. & L. Young. 1996. Dinosaurs of the East Coast. The Johns Hopkins University Press Li-da, Harris, J.D., Xiang-yang, and Zhi-jun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galtonia Gibbidens
''Galtonia'' is an extinct genus of pseudosuchian from the Late Triassic. It is known from remains found in the Late Triassic-aged New Oxford Formation of Pennsylvania, which were first described by Edward Drinker Cope in 1878. Cope, E. D. (1878). On some Saurians found in the Triassic of Pennsylvania, by C. M. Wheatley. ''Proceedings of the American Philosophical Society'' 17(100):231-232 The type and only species, ''G. gibbidens'', was originally named ''Thecodontosaurus gibbidens'' in 1878, but was moved to a new genus by Hunt and Lucas in 1994. It is based on the lectotype AMNH 2339, discovered by C. M. Wheatley. There is also a genus of flower with the name ''Galtonia'', causing further confusion. ''Galtonia'', upon being identified as its own genus separate from ''Thecodontosaurus'', was initially classified as an ornithischian, but was seen to be ''Revueltosaurus'', which is actually a non-dinosaurian archosaur. Irmis ''et al.'' (2006) even assigned ''Galtonia'' to ''Revu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compsosaurus
''Compsosaurus'' (meaning "elegant lizard") is an extinct genus of phytosaur, a crocodile-like reptile that lived during the Triassic. Its fossils have been found in North Carolina. The type species, ''Compsosaurus priscus'', was named by American paleontologist Joseph Leidy in 1856, although other sources say 1857. ''Compsosaurus'' may have been the same animal as the related ''Belodon''. Only four teeth are known, discovered in the Carnian-Rhaetian-aged coal fields of Chatham County, North Carolina (probably Red Sandstone Formation) and the New Oxford Formation of Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, .... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clepsysaurus
''Clepsysaurus'' is a dubious genus of extinct archosaur described by Isaac Lea in 1851 from remains discovered in the Carnian Passaic Formation of Lehigh County, Pennsylvania. Two species are known: ''C. pennsylvanicus'' (the type species) and ''C. veatleianus''. The holotype of ''C. pennsylvanicus'', ANSP 9526, 9555-71, 9594-5, consists of teeth, ribs and vertebrae, while the holotype of ''C. veatleianus'', AMNH 2331, consists of a single tooth, with AMNH 2330, a tooth, as a referred specimen. Other specimens of ''C. pennsylvanicus'' are known, including ANSP 15071 (a left anterior dentary with 23 teeth, a right dentary with 30 teeth and a portion of the right temporal region) and AMNH 2337 (a single tooth). ''Clepsysaurus'' was traditionally classed as a sauropodomorph, but more recent studies indicate that it was either a dubious basal archosaur or a member of the Phytosauria. ''Clepsysaurus'' was eventually seen as a synonym of either the dubious archosaur ''Palaeosaurus'' or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atreipus
''Atreipus'' is an ichnogenus An ichnotaxon (plural ichnotaxa) is "a taxon based on the fossilized work of an organism", i.e. the non-human equivalent of an artifact. ''Ichnotaxa'' comes from the Greek ίχνος, ''ichnos'' meaning ''track'' and ταξις, ''taxis'' meaning ... or trace fossil attributed to early Ornithischian dinosaurs. Its significance for Triassic biostratigraphy has earned it some fame. Reptile footprint faunules from the early Mesozoic Newark Supergroup of eastern North America. See also * Ichnology References Dinosaur trace fossils {{trace-fossil-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eubrontes
''Eubrontes'' is the name of fossilised dinosaur footprints dating from the Late Triassic and Early Jurassic. They have been identified from France, Poland, Slovakia, Czech Republic, Italy, Spain, Sweden, Australia (Queensland), USA, India and China. ''Eubrontes'' 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 is presumed to be similar to ''Coelophysis'' or ''Dilophosaurus''. They are most famous for their discovery in the Connecticut River Valley of Massachusetts in the early 19th century. They, among other footprints, were the first known non-avian dinosaur tracks to be discovered in North America, though they were initially thought to have been made by large birds. Discovery and identity The footprints were first described by Edward Hitchcock, a professor of Amherst College, who thought they were made by a large bird. He originally assigned them to ichnotaxon ''Ornithichnites'' in 1836, then ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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