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San Carlos Formation
The San Carlos Formation is a geological formation in west Texas and east Chihuahua whose strata date back to the Campanian stage of the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 574-588. . Plants *''Javelinoxylon deca''Estrada-Ruiz, E., & Martínez-Cabrera, H. I. (2011)A new late cretaceous (Coniacian-Maastrichtian) Javelinoxylon wood from Chihuahua, Mexico.IAWA Journal, 32(4), 521-530. https://doi.org/10.1163/22941932-90000074 *'' Agathoxylon sp.'' *''Paraphyllanthoxylon anasazi'' Vertebrate paleofauna * '' Gryposaurus sp.'' * '' Kritosaurus sp.'' ('' Gryposaurus sp.'') * '' Stegoceras sp.'' * '' Deinosuchus sp.'' Invertebrate paleofauna * ''Mortoniceras'' * ''Brancoceras'' * ''Prionocyclu ... [...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 Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stegoceras
''Stegoceras'' is a genus of pachycephalosaurid (dome-headed) dinosaur that lived in what is now North America during the Late Cretaceous period, about 77.5 to 74 million years ago (mya). The first specimens from Alberta, Canada, were described in 1902, and the type species ''Stegoceras validum'' was based on these remains. The generic name means "horn roof", and the specific name means "strong". Several other species have been placed in the genus over the years, but these have since been moved to other genera or deemed junior synonyms. Currently only ''S. validum'' and ''S. novomexicanum'', named in 2011 from fossils found in New Mexico, remain. The validity of the latter species has also been debated. ''Stegoceras'' was a small, bipedal dinosaur about long, and weighed around . The skull was roughly triangular with a short snout, and had a thick, broad, and relatively smooth dome on the top. The back of the skull had a thick "shelf" over the occiput, and it had a thick ridge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campanian Stage
The Campanian is the fifth of six age (geology), ages of the Late Cretaceous epoch (geology), Epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stage (stratigraphy), stages in the Upper Cretaceous series (stratigraphy), Series. Campanian spans the time from 83.6 (± 0.2) to 72.1 (± 0.2) million years ago. It is preceded by the Santonian and it is followed by the Maastrichtian. The Campanian was an age when a worldwide marine transgression, sea level rise covered many coastal areas. The geomorphology, morphology of some of these areas has been preserved: it is an unconformity beneath a cover of marine sedimentary rocks. Etymology The Campanian was introduced in scientific literature by Henri Coquand in 1857. It is named after the French village of Champagne, Charente-Maritime, Champagne in the department of Charente-Maritime. The original type locality (geology), type locality was a series of out ... [...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 Cretaceo ... {{DEFAULTSOR ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudothurmannia
''Pseudothurmannia'' is a genus of extinct cephalopods belonging to the subclass Ammonoidea and included in the family Crioceratitidae of the ammonitid superfamily Ancylocerataceae. These fast-moving nektonic carnivores lived in the Cretaceous period, from Hauterivian age to Barremian age.Sepkoski, JacSepkoski's Online Genus Database – Cephalopoda/ref> Species Klein, J. ''et al.'', 2007. FOSSILIUM CATALOGUS I:ANIMALIA Pars 144, Lower Cretaceous Ammonites III Bochianitoidea, Protancyloceratoidea, Ancyloceratoidea, Ptychoceratoidea. * ''Pseudothurmannia angulicostata'' d'Orbigny, 1863 * ''Pseudothurmannia belimelensis'' Dimtrova, 1967 * ?''Pseudothurmannia biassalensis'' Dimtrova, 1967 * ''Pseudothurmannia catulloi'' Parona, 1898 * ?''Pseudothurmannia crimensis'' Wiedmann, 1962 * ''Pseudothurmannia grandis'' Busnardo, 1970 * ''Pseudothurmannia isocostata'' Kakabadze, 1981 * ''Pseudothurmannia karakaschi'' Manolov, 1962 * ''Pseudothurmannia lurensis'' Busnardo, 1970 * ''Pseudothu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammites
''Mammites'' is a Late Cretaceous (Cenomanian to Turonian) ammonite genus included in the acanthoceratoidean family, Acanthoceratidae, and the type genus for the subfamily Mammitinae. ''Mammites'' was named by Laube and Bruder in 1887. Species Species within the genus ''Mammites'' include:''Mammites'' at .org * ''M. mohavanensis'' Böse, 1923 - found at Loma el Macho, Coahuila, Mexico * ''M. mutabilis'' Reyment, 1955 - known from Cameroon * ''M. nodosoides'' Schlüter, 1871 - found in North and South America, Africa and Europe * ''M. powelli'' Kennedy ''et al.'', 1987 - found in Texas and Colombia * ''M. rancheriae'' An ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Romaniceras
''Romaniceras'' is a genus of Upper Cretaceous ammonites in the Acanthoceratidae subfamily Euomphaloceratinae Euomphaloceratinae is a subfamily of Upper Cretaceous ammonites included in the Acanthoceratidae, characterized by generally evolute shells with quadrate whorl sections that are strongly ribbed. Sutures are ammonitic, but not overly complex. Gen .... The shell is rather evolute, whorl section circular to oval and ''Romaniceras'' differs from '' Acanthoceras'' in having 9 or 11 rows of tubercles, of which the ventrolateral may be clavate (i.e. elongate). The ribs of ''Romaniceras'' specimens are strong and fairly close spaced.W.J. Arkell ''et al.'', 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Geological Society of America and University of Kansas Press.Spath, 1923 References Cretaceous ammonites Acanthoceratidae Ammonitida genera Ammonites of Europe Cenomanian genus first appearances Turonian genus extinctions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acompsoceras
''Acompsoceras'' is an extinct genus of cephalopod belonging to the Ammonite subclass. It grew to a large size compared to most ammonites. Its shell reached in diameter when the animal reached adulthood. ''Acompsoceras'' appears in the fossil record during the early portion of the Cretaceous Cenomanian stage and goes extinct around the middle of that same stage. Species ''Acompsoceras'' is in the same family as '' Acanthoceras'', the Acanthoceratidae, and contains several species: * ''A. amphibolum'' * ''A. calabarense'' * ''A. essendiense'' * ''A. inconstans'' * ''A. renevieri'' Distribution Fossils of ''Acompsoceras'' have been found in Brazil, Colombia (Hiló Formation), Germany, Madagascar, Nigeria, the United Kingdom and Texas.''Acompsoceras'' at |
Acanthoceras (ammonite)
''Acanthoceras'' is an extinct cephalopod genus belonging to the subclass Ammonoidea and family Acanthoceratidae that lived from the Albian to early Coniacian stages of the Cretaceous.''Acanthoceras'' at .org Description Their shells had ornate ribs whose function is unknown, although some scientists have speculated that these ribs helped strengthen the animals' shells to allow them to live at greater depths where the water pressure is higher. An adult had a shell diameter of approximately .Species * ''A. athabascense'' Warren and Stelck, 1955 * ''A. chasca'' Benavides-Caceres, 1956 * ''A. compital ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coilopoceras
''Coilopoceras'' is a compressed, involute, lenticular ammonitid from the Cretaceous (Albian to Turonian),''Coilopoceras'' at .org with a narrow venter and raggedy ammonitic suture; type of the , a family in the of the suborder . Distributio ...
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Brancoceras
''Brancoceras'' is a rather small, strongly ribbed, acanthoceratacean ammonite from the Albian stage of the Lower Cretaceous, the shell evolute with a subquadrate whorl section and rounded venter. The suture forms a finely squiggly line with well-defined lobes and saddles. ''Brancoceras (Eubrancoceras) aegoceratoides'' reached a diameter of at least . ''Brancoceras'' is representative of the subfamily Brancoceratinae, which makes up part of the acanthoceratacean family Brancoceratidae Brancoceratidae is a family of acanthoceratoid ammonites from the middle of the Cretaceous, recognized by their commonly evolute shells with round, oval, or quadrate whorls, strong ribs, usual ventral keels, and at least, umblical tubercles. Th .... Its stratigraphic range is rather narrow, extending only from the upper Lower to the Middle Albian. References * *Ryszard Marcinowski and Jost Wiedmann. The Albian Ammonites of Poland. Palaeontologia Polonica no. 50, 1990 Ammonitida genera Ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mortoniceras
''Mortoniceras'' is an ammonoid genus belonging to the superfamily Acanthocerataceae, named by Meek in 1876, based on ''Ammonites vespertinu'', named by Morton in 1834. ''Mortoniceras'' is the type genus of the Mortoniceratinae, one of 4 subfamilies in the Brancoceratidae which is part of the Acanthocerataceae (renamed Acanthoceratoidea to conform with the ICZN ruling on superfamily endings) Distribution ''Mortoniceras'' is found in middle and upper Albian sediments, at the end of the Lower Cretaceous in Algeria, Angola, Armenia, Belgium, Canada (British Columbia), Colombia ( Hiló Formation), Ecuador, France, Germany, Iran, Japan, Madagascar, Mexico, Mozambique, Nigeria, South Africa, Spain, Suriname, Switzerland, Ukraine, the United Kingdom, the United States (California, New Mexico, Texas, Oregon), and Venezuela. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
