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Hidden Lake Formation
The Hidden Lake Formation is a Late Cretaceous geologic Formation (geology), formation in Antarctica. The sandstones and siltstones of the formation were deposited in a river delta, deltaic depositional environment, environment. Indeterminate megalosaur remains have been recovered from it.Weishampel, et al. (2004). "Dinosaur distribution" pp. 517–607. in Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): ''The Dinosauria'', 2nd, Berkeley: University of California Press. 861 pp. . " pp. 517–607. Also many plant fossils and ichnofossils of ''Planolites, Planolites sp.'' and ''Palaeophycus, Palaeophycus sp.'' have been found in the formation.Hidden Lake at Fossilworks.org Paleofauna *Megalosauroidea indet. *''Palaeophyc ...[...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 (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] |
Ichnofossil
A trace fossil, also known as an ichnofossil (; from el, ἴχνος ''ikhnos'' "trace, track"), is a fossil record of biological activity but not the preserved remains of the plant or animal itself. Trace fossils contrast with body fossils, which are the fossilized remains of parts of organisms' bodies, usually altered by later chemical activity or mineralization. The study of such trace fossils is ichnology and is the work of ichnologists. Trace fossils may consist of impressions made on or in the substrate by an organism. For example, burrows, borings (bioerosion), urolites (erosion caused by evacuation of liquid wastes), footprints and feeding marks and root cavities may all be trace fossils. The term in its broadest sense also includes the remains of other organic material produced by an organism; for example coprolites (fossilized droppings) or chemical markers (sedimentological structures produced by biological means; for example, the formation of stromatolites). Ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snow Hill Island Formation
The Snow Hill Island Formation is an Early Maastrichtian geologic formation found on James Ross Island, James Ross Island group, Antarctica. Remains of a paravian theropod ''Imperobator antarcticus''Ely & Case, 2019 have been recovered from it, as well as the elasmarian ornithopods '' Trinisaura santamartaensis'', ''Biscoveosaurus'' and ''Morrosaurus antarcticus'', the ankylosaurian ''Antarctopelta oliveroi'', and the shark ''Notidanodon'' sp. Alongside these described genera are also the remains of indeterminate elasmosaurids,O'Gorman, 2012, p.2 lithostrotian titanosaurs and an indeterminate pterosaur. In the Herbert Sound Member of the Snow Hill Island Formation, bivalves, ammonites, and fish were found.O'Gorman, 2012, p.3 Fossil content See also * List of fossiliferous stratigraphic units in Antarctica * List of dinosaur-bearing rock formations * Sobral Formation * South Polar region of the Cretaceous The South Polar region of the Cretaceous comprised the continent o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In Antarctica
This is a list of fossiliferous stratigraphic units in Antarctica. __NOTOC__ List of fossiliferous stratigraphic units See also * Geology of Antarctica * List of fossiliferous stratigraphic units in Namibia * List of fossiliferous stratigraphic units in South Africa * List of fossiliferous stratigraphic units in the Falkland Islands References Further reading * G. Arratia, R. Scasso, and W. Kiessling. 2004. Late Jurassic fishes from Longing Gap, Antarctic Peninsula. Journal of Vertebrate Paleontology 24(1):41-55 * A. C. Ashworth and G. Kuschel. 2003. Fossil weevils (Coleoptera: Curculionidae) from latitude 85 ˚S Antarctica. Palaeogeography, Palaeoclimatology, Palaeoecology 191:191-202 * R. A. Askin. 1990. Cryptogam spores from the upper Campanian and Maastrichtian of Seymour Island, Antarctica. Micropaleontology (36)141-156 * R. A. Askin. 1989. Endemism and heterochrony in the Late Cretaceous (Campanian) to Paleocene palynofloras of Seymour Island, Antarctica: im ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Stratigraphic Units With Indeterminate Dinosaur Fossils
This list of stratigraphic units with indeterminate dinosaur fossils includes stratigraphic units of formation rank or higher that have produced dinosaur body fossils, although none of these remains have been referred to a specific genus in the scientific literature. Europe Africa and Middle East Australasia and Antarctica East Asia Western Hemisphere See also List of dinosaur-bearing rock formations This list of dinosaur-bearing rock formations is a list of geologic formations in which dinosaur fossils have been documented. Containing body fossils * List of stratigraphic units with dinosaur body fossils ** List of stratigraphic units with f ... Footnotes References * Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. . {{DEFAULTSORT:List Of Stratigraphic Units With Indeterminate Dinosaur Fossils Indeterminiate dinosaur fossils ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Dinosaur-bearing Rock Formations
This list of dinosaur-bearing rock formations is a list of geologic formations in which dinosaur fossils have been documented. Containing body fossils * List of stratigraphic units with dinosaur body fossils ** List of stratigraphic units with few dinosaur genera ** List of stratigraphic units with indeterminate dinosaur fossils Containing trace fossils * List of stratigraphic units with dinosaur trace fossils ** List of stratigraphic units with dinosaur tracks *** List of stratigraphic units with ornithischian tracks *** List of stratigraphic units with sauropodomorph tracks *** List of stratigraphic units with theropod tracks See also * Lists of fossiliferous stratigraphic units * List of fossil sites * Mesozoic The Mesozoic Era ( ), also called the Age of Reptiles, the Age of Conifers, and colloquially as the Age of the Dinosaurs is the second-to-last era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Creta ... {{DE ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lygodium
''Lygodium'' (climbing fern) is a genus of about 40 species of ferns, native to tropical regions across the world, with a few temperate species in eastern Asia and eastern North America. It is the sole genus in the family Lygodiaceae in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Alternatively, the genus may be placed as the only genus in the subfamily Lygodioideae of a more broadly defined family Schizaeaceae, the family placement used in ''Plants of the World Online'' . Description ''Lygodium'' are unusual in that the rachis, or midrib, of the frond is thin, flexible, and long, the frond unrolling with indeterminate growth and the rachis twining around supports, so that each frond forms a distinct vine. The fronds may be from long, depending on the species. Uses ''Lygodium'' species, known as ''nito'', are used as a source of fibers in the Philippines. The fibers are used as material for weaving, most notably of traditional salakot headgear. As invasiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elatocladus
''Elatocladus'' is an extinct form genus of Mesozoic sterile conifer Conifers are a group of cone-bearing seed plants, a subset of gymnosperms. Scientifically, they make up the division Pinophyta (), also known as Coniferophyta () or Coniferae. The division contains a single extant class, Pinopsida. All ex ... leaves, used for shoots with the morphology of "elongated, dorsiventrally flattened leaves with a single vein; divergent from stem". Conifers with leaves of ''Elatocladus'' morphology are of uncertain taxonomic position within conifers. References Conifer genera Triassic plants Jurassic plants Cretaceous plants Prehistoric gymnosperm genera {{cretaceous-plant-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctoxylon
''Antarctoxylon'' is a morphogenus of angiosperms that is found in the Coniacian of Antarctica. The most recently named species, ''A. mixai'', is found in the Hidden Lake Formation on James Ross Island. All the other species, named by Poole and Cantrill, are found on Williams Point, Livingston Island Livingston Island (Russian name ''Smolensk'', ) is an Antarctic island in the Southern Ocean, part of the South Shetlands Archipelago, a group of Antarctic islands north of the Antarctic Peninsula. It was the first land discovered south of 60� .... References Prehistoric angiosperm genera Late Cretaceous plants Fossil taxa described in 2001 {{cretaceous-plant-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megalosauroidea
Megalosauroidea (meaning 'great/big lizard forms') is a superfamily (or clade) of tetanuran theropod dinosaurs that lived from the Middle Jurassic to the Late Cretaceous period. The group is defined as '' Megalosaurus bucklandii'' and all taxa sharing a more recent common ancestor with it than with '' Allosaurus fragilis'' or '' Passer domesticus''. Members of the group include '' Spinosaurus'', '' Megalosaurus'', and '' Torvosaurus''. They are possibly paraphyletic in nature. Classification The name Spinosauroidea is sometimes used in place of Megalosauroidea. The superfamily Spinosauroidea was named in 1915 by Ernst Stromer. It is a synonym of Megalosauroidea in almost all modern phylogenetic analyses, and it is therefore redundant. Spinosauroidea was defined as a clade in 1998 by Paul Sereno as the node clade containing the common ancestor of ''Spinosaurus'' and ''Torvosaurus'' and all its descendants. Thomas Holtz in 2004 defined a branch clade with the same name containi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
