Upper cretaceous.

The Cretaceous (IPA: / k r ɪ ˈ t eɪ ʃ ə s / krih-TAY-shəs) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest.At around 79 million years, it is the longest geological period of the entire Phanerozoic.The name is derived from the Latin creta, "chalk", which is abundant in the latter ...The Naparima Hill Formation is an organic rich, oil-prone sedimentary sequence located in the upper section of the Cretaceous source rock of Trinidad (Rodrigues, 1988) (Fig. 2a).section of Cretaceous and lower Tertiary rocks from the Book Cliffs near Price, Utah, to the Colorado-Utah State line. The projected outcrop equivalent of the Upper Cretaceous section in the Wilkin Ridge well is between the Sunnyside and Green River locations (figs. 1,2), and, although analogies can be drawn between the outcrop andThe Santonian is an age in the geologic timescale or a chronostratigraphic stage. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series. It spans the time between 86.3 ± 0.7 mya ( million years ago) and 83.6 ± 0.7 mya. The Santonian is preceded by the Coniacian and is followed by the Campanian.The upper Cretaceous Naparima Hill Formation, a primary source rock for conventional oil and gas reservoirs in Southern and Columbus basins, Trinidad is now considered an unconventional reservoir. Effective fracability evaluation is critical to the entire process of unconventional reservoir exploitation. At present, there exists no information on the fracability of the Naparima Hill Formation.

Between 1999 and 2008 the CGS mapped and published open-file reports covering twenty preliminary 7.5 minute quadrangles in the area between Colorado Springs and Denver. Most of these quadrangles contain exposures of Upper Cretaceous through Eocene strata deposited as synorogenic sedimentary units that filled the Laramide Denver Basin. In this report, Dr. Jon Thorson, who […]We describe a new dromaeosaurid theropod from the Upper Cretaceous Wulansuhai Formation of Bayan Mandahu, Inner Mongolia. The new taxon, Linheraptor exquisitus gen. et sp. nov., is based on an exceptionally well-preserved, nearly complete skeleton. This specimen represents the fifth dromaeosaurid taxon recovered from the Upper Cretaceous Djadokhta Formation and its laterally equivalent strata ...

The Coniacian is an age or stage in the geologic timescale. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series and spans the time between 89.8 ± 1 Ma and 86.3 ± 0.7 Ma (million years ago). The Coniacian is preceded by the Turonian and followed by the Santonian. [3]

The Upper Cretaceous succession is quite complete, with small hiatuses mostly present in the lower part (Marcinowski Citation 1980; Walaszczyk Citation 1987). The upper Campanian-lowermost Maastrichtian interval treated in this study is exposed near the town of Solec nad Wisłą (Figure 1).Geographical and geological situation of the Oliete sub-basin (Teruel, Spain). a Mesozoic basins of the Iberian Peninsula. The square indicates the location of the …Magnetostratigraphy provides a continuous and precise chronological framework for constraining changes in the SAR in the Longmenshan foreland basin. …The carnivore Tyrannosaurus rex dominated the late Cretaceous in the north while monstrous meat-eaters like Spinosaurus, which had a huge sail-like fin on its back, …

The Campanian is the fifth of six ages of the Late Cretaceous Epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous 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 …

In Khalda structure, the Cretaceous section was interpreted on the seismic sections covering the Khalda Oil Field. It is indicated that the Upper Cretaceous Abu Roash and the Lower Cretaceous Alam-El Bueib formations have been affected by normal faulting. Though the implication of folding is minimized, it is traceable in the field.

The specimen under study was collected during field seasons of 1998 as part of a paleontological survey of the upper Cretaceous sedimentary units of the Antarctic Peninsula. It was found partially articulated by Allen J. Kihm, of Minot State University, and is permanently housed in the South Dakota School of Mines and Technology (SDSM 78147 ...Recently, a construction project in the Upper Cretaceous red beds of the Ganzhou Basin, Jiangxi Province, China revealed a fossilized clutch of spheroolithid eggs. In this contribution, we briefly describe two of these eggs and their embryonic contents, accessioned at the Yingliang Stone Natural History Museum (YLSNHM) in Fujian Province, China.The carnivore Tyrannosaurus rex dominated the late Cretaceous in the north while monstrous meat-eaters like Spinosaurus, which had a huge sail-like fin on its back, …Rare remains of tyrannosauroid dinosaurs from the Aguja Formation in West Texas indicate the presence here of a relatively gracile species, comparable in form and adult size to Appalachiosaurus or subadult albertosaurines, Gorgosaurus and Albertosaurus.Histologic analysis of one of the specimens indicates that the Aguja tyrannosaur attained an adult size substantially smaller than adult ...Dinosaurios Cretaceous tetrapods of Argentina; J.F. Bonaparte et al. Los saurópodos de América los grupos Neuquén y Chubut, y sus relaciones cronológicas; J.F. Bonaparte et al. A continental assemblage of tetrapods from the Upper Cretaceous beds of El Brete, northwestern Argentina (Sauropoda, Coelurosauria, Carnosauria, Aves)

Show abstract. PDF | On Jan 1, 1998, J.A. Burnett published Upper Cretaceous | Find, read and cite all the research you need on ResearchGate.Sep 21, 2023 · The Upper Cretaceous Nanxiong Formation of Jiangxi Province, southern China has yielded a diverse array of vertebrates in recent years, including theropods (Xu and Han 2010 ; Wang et al. 2013 ; Wei Petroleum Engineering Dept, Well planning and implementation. Danish Sector North Sea (Halfdan Field Development - Upper Cretaceous and Danian Chalk).Tasks included: optimizing well path trajectories (Petrel) compared with the field development plan after data review of wells as drilled, the writing of well prognosis, preparation of wellsite geology package, pre-spud and pre-reservoir ...Hence, Upper Cretaceous petroleum system dynamics is intimately linked to basin geodynamics; where hydrocarbon migration pathways could follow the migration, rotation and tilting of platform and basin blocks. The volume of Lower Fahden and Bahloul source rocks expelled hydrocarbons from the basin kitchens, is much greater than that found in the ...Upper Cretaceous (lower-middle Turonian—middle Campanian), Xiaguan Formation, Neixiang County, Henan Province, China. Diagnosis. Small basal neoceratopsian with the following autapomorphies ...A new Cretaceous ootaxon (eggshell type) from the Kaiparowits Formation of Grand Staircase-Escalante National Monument is among a growing number of very small eggs described from the Mesozoic.

The upper Cretaceous Austin Chalk Group in south-central Texas, USA, displays vertical and lateral variations in thickness and facies resulting from an irregular paleotopography of the seafloor and variable preservation of 3 rd-order sea-level cycles.During the Coniacian to early Campanian, the tectonic evolution of the San Marcos Arch, a prominent basement feature in the study area, impacted ...7 de set. de 2018 ... At the time the Upper Cretaceous portion of the formation was deposited, central western Queensland was at ∼50°S palaeolatitude (Li & Powell, ...

Purbeck Beds, unit of sedimentary rocks exposed in southern England that spans the boundary between the Jurassic and Cretaceous periods, approximately 145 million years ago. The highly varied Purbeck Beds, which overlie rocks of the Portland Beds, record a marked change in sedimentary facies,Background Dinosaur eggs containing embryos are rare, limiting our understanding of dinosaur development. Recently, a clutch of subspherical dinosaur eggs was discovered while blasting for a construction project in the Upper Cretaceous red beds (Hekou Formation) of the Ganzhou Basin, Jiangxi Province, China. At least two of the eggs contain identifiable hadrosauroid embryos, described here for ...Upper Cretaceous leaf flora from the Blaszyk Moraine (Zamek Formation), King George Island, South Shetland Islands, West Antarctica. Acta Palaeobotanica, 34 (1994), pp. 119-163. Google Scholar. 151. Zhiyan Zhou, Haomin Li. Some Late Cretaceous plants from King George Island, Antarctica.Kem Kem Group. The Kem Kem Group (commonly known as the Kem Kem beds [2]) is a geological group in the Kem Kem region of eastern Morocco, whose strata date back to the Cenomanian stage of the Late Cretaceous. Its strata are subdivided into two geological formations, with the lower Ifezouane Formation and the upper Aoufous Formation, with …ODP Leg 132, with some Upper Cretaceous sediment recovered at Sites. 47, 48, 305, 577, and 810. The Cretaceous sectio ns recovered at all sites. d u r i n g L e g 1 9 8 w e r e c h a r a c t e r i ...Theropod and other dinosaurian tracks from the upper Lower Cretaceous of northeastern China: overlooked Fuxin Biota records reinvestigated. , Cretaceous Research, 135 105190, 1-9First Upper Cretaceous dinosaur track assemblage from Jordan (Middle East) - preliminary results September 2020 Annales Societatis Geologorum Poloniae 90:331 - 342A new ankylosaurian dinosaur (Ornithischia: Ankylosauria) from the Upper Cretaceous of Shanxi Province, People's Republic of China. Journal of Vertebrate Paleontology, Vol. 18, Issue. 2, p. 376. CrossRef; Google Scholar; Garcia, Géraldine and Suberbiola, Xabier Pereda 2003.The upper part of the sequence has yielded Cretaceous benthic foraminifers (Rajashekhar 1991) and nannoplankton species Marthastenites furcatus of the Turonian age (Jafar 1982). The marine incursion in the Late Cretaceous is represented by small isolated outcrops of the Bagh Beds in the Dhar district, Madhya Pradesh (Fig. 15.15 ).

Upper Cretaceous marine sequences in the Gulf Coastal Plain (USA) span the Cretaceous–Paleogene (K–Pg) transition, allowing for detailed studies of one of the most severe extinction events of ...

The Nemegt Basin is located in the Gobi region of Southern Mongolia (Fig. 1 A, B).During the late Cretaceous, the Gobi Desert was a landmass interior with a continental climate, covered by wooden areas and meandering and braided rivers (Gradziński, 1970; Eberth et al., 2014; Eberth, 2018).The Nemegt Basin sediments were initially subdivided by Gradziński (1970) into the Lower ...

Robert G. Loucks, Toti E. Larson, Charlie Y. C. Zheng, Christopher K. Zahm, Lucy T. Ko, James E. Sivil, Peng Sheng, Stephen C. Ruppel, William A. Ambrose; Geologic characterization of the type cored section for the Upper Cretaceous Austin Chalk Group in southern Texas: A combination fractured and unconventional reservoir.The intracontinental Benue Trough was initiated during the Lower Cretaceous in relation with the Atlantic Ocean opening. The first stage of its evolution started in the Aptian, forming isolated basins with continental sedimentation. ... In the Albian times, a great delta developed in the Upper Benue Trough, while the first marine transgression ...Jun 1, 2021 · Remains of juvenile sauropods from the Upper Cretaceous Portezuelo Formation (Neuquén Group), at Barreales Lake (Neuquén Province), are identified and described. The material include a femur (14.6 cm length) and an anterior caudal vertebra (3.1 cm length). Their general morphology allows us to assign these bones to the Titanosauria. The Cenomanian is, in the ICS ' geological timescale, the oldest or earliest age of the Late Cretaceous Epoch or the lowest stage of the Upper Cretaceous Series. [4] An age is a unit of geochronology; it is a unit of time; the stage is a unit in the stratigraphic column deposited during the corresponding age.The Upper Cretaceous (middle-late Campanian) Wahweap Formation of southern Utah contains the oldest diagnostic evidence of ceratopsids (to date, all centrosaurines) in North America, with a number ...1. Introduction. Ever since the Cretaceous System was first introduced, by the Belgian geologist Jean-Baptiste-Julien d'Omalius d'Halloy (1822), it has been arbitrarily divided into two or three series, i.e. lower and upper Cretaceous or lower, middle and upper Cretaceous, respectively, a situation that continues unabated today to the obvious detriment of clarity in stratigraphic communication.Background Late Cretaceous terrestrial strata of the Neuquén Basin, northern Patagonia, Argentina have yielded a rich fauna of dinosaurs and other vertebrates. The diversity of saurischian dinosaurs is particularly high, especially in the late Cenomanian-early Turonian Huincul Formation, which has yielded specimens of rebacchisaurid and titanosaurian sauropods, and abelisaurid and ...The Bellezma-Batna Mountains of northeast Algeria mainly consist of Jurassic-Cretaceous platform carbonate deposits (Marmi, 1995 ), forming the eastern part of the …Saltasaurus (which means "lizard from Salta") is a genus of saltasaurid dinosaur of the Late Cretaceous period of Argentina.Small among sauropods, though still heavy by the standards of modern creatures, Saltasaurus was characterized by a short neck and stubby limbs. It was the first genus of sauropod known to possess armour of bony plates …

A new Podocnemidinura specimen from the Upper Cretaceous Bauru Group (Paraná Basin) of southeastern Brazil was described. The Bauru Group provided an important portrait of the Brazilian Mesozoic terrestrial biota, which boasts a vertebrate fauna formed from fishes, frogs, lacertilians, crocodyliforms, dinosaurs and mammals; records of palynomorphs; and invertebrate fauna consisted of ...A new genus and two new species Coronidilar yanae gen. et sp. nov. and Cretodilar multinervius sp. nov. (Neuroptera: Dilaridae), were described from Upper Cretaceous (Cenomanian) amber of northern Myanmar. They are assigned to this family by the typical male antenna with unipectinate flagellum (Coronidilar yanae sp. nov.), proximal and median nygmata present (both species); Coronidilar yanae ...Laocoetis piserai n. sp. (Hexactinellida, Porifera) from the mid-Cretaceous (i.e., Albian–Cenomanian) of James Ross Island is the first record of a fossil sponge from Antarctica. This new occurrence of a formerly widespread genus was restricted to relatively deep waters on the margins of an active volcanic arc.A partial skull of a pachycephalosaurid from the Upper Cretaceous Hell Creek Formation, Montana, is interpreted as a new taxon, Platytholus clemensi gen. et sp. nov. MOR 2915 does not fit into an ...Instagram:https://instagram. free games for teacherspaul enosadobe indesigsydney johnston Upper Cretaceous dinosaur remains from Afro-Arabia are rare and mainly restricted to pre-Turonian horizons. Consequently, the discovery of new fossils from Upper Cretaceous deposits in the Western Desert, central Egypt is significant because it adds to the meager record of dinosaurs described from this landmass.The Cretaceous strata that were drilled include the Upper Cretaceous Mingshui Fm, the Sifangtai Fm, the Nenjiang Fm, the Yaojia Fm, the Qingshankou Fm, the Quantou Fm, the Lower Cretaceous Denglouku Fm, the Yingcheng Fm, and the Shahezi Fm. From the SK-2e borehole, a total length of 130.47 m of core was recovered for Nenjiang Fm. who does byu play nextku aba program The Upper Cretaceous, and in particular the Campanian-Maastrichtian, dinosaur fossil record from Egypt is restricted to a handful of discoveries represented by isolated remains of mainly titanosaurian sauropods and abelisaurid theropods (Buffetaut et al., 1990; Rauhut and Werner, 1997; Wiechmann, 1999a, 1999b; Smith and Lamanna, 2006). dinosaurs in kansas Sequence analysis of the upper Cretaceous Two Medicine and Judith River formations, Montana: nonmarine response to the Claggett and Bearpaw marine cycles. Journal of Sedimentary Research 68 : 615 - 631 .The integument of the theropod dinosaur Carnotaurus sastrei from the Upper Cretaceous of Argentina is here described in detail for the first time. The scaly skin of this abelisaurid is the most completely preserved of any theropod and the only example of this form of integument known outside of Tetanurae (excluding footprints).The Upper Cretaceous Gaogou, Majiachun and Sigou formations in the Xixia Basin are composed of terrestrial clastic deposits, which are dominated by red-violet mudstones, muddy siltstones, siltstones, grayish fine-grained sandstones, intercalated with grayish, off-white medium- and coarse-grained sandstones or conglomerates.