Upper cretaceous. Upper Cretaceous of California 235 Within California, ...

We describe a globally rare example of a tetrapod bu

The Upper Cretaceous units of the Golfo San Jorge Basin, where the vertebrate fossil record is significant, comprise Bajo Barreal (early Cenomanian-late Turonian) and Lago Colhué Huapi (Coniacian-Maastrichtian) formations (see Casal et al., 2015, 2016). The variety of fossil vertebrates in these units constitutes an excellent opportunity to ...The Pierre Shale is a geologic formation or series in the Upper Cretaceous which occurs east of the Rocky Mountains in the Great Plains, from Pembina Valley in Canada [2] to …A limited exposure of Upper Cretaceous marine siltstones and claystones near the coastal town of Carlsbad, California, contains a remarkably well-preserved ...Sep 30, 2015 · In the Zagros area and the Persian Gulf, Upper Cretaceous carbonate sequences are among the most important hydrocarbon reservoirs. In this study, facies analysis and stratigraphic interpretation of these sequences, Cenomanian-Santonian in age, have been carried out in subsurface sections from various parts of the Zagros area (including the Dezful Embayment and Fars Province) and the Persian ... The upper boundary of the Cretaceous is sharply defined, being placed at an iridium-rich layer found worldwide that is believed to be associated with the Chicxulub impact crater, with its boundaries circumscribing parts of the Yucatán Peninsula and extending into the Gulf of Mexico. This layer has been dated at 66.043 Mya. New ornithomimid material discovered from the Upper Cretaceous Packard Shale Formation, (Cabullona Group) of Sonora, Mexico is described. The material includes a partial skeleton, which is assigned to a new genus and species, Tototlmimus packardensis.This new taxon differs from other ornithomimids in having five unique characteristics that separate it from other Northamerican ornithomimids: (1 ...Lithology and stratigraphy of the beds in the Upper Cretaceous (Upper Turonian- flint occurrences in South Limburg (the Netherlands) and Santonian) of Haute Normandie, France. Sedimentology, the neighbouring Belgium and German borderland as well 21, 1-42. as the exploitation of these flints in prehistoric times.Cenomanian Stage, first of six main divisions (in ascending order) in the Upper Cretaceous Series, representing rocks deposited worldwide during the Cenomanian Age, which occurred 100.5 million to 93.9 million years ago during the Cretaceous Period. Rocks of the Cenomanian Stage overlie those ofIn this work, an assemblage of fossil woods briefly mentioned by Alvarez et al. (2019, 2020) from the Bajo Barreal Formation (Upper Cretaceous of the Golfo San Jorge Basin, in central Patagonia, Argentina) is described in detail, being the second study of woods from this stratigraphic unit, after that of Pujana et al. (2007).The origin of modern rainforests can be traced to the aftermath of the bolide impact at the end of the Cretaceous. Carvalho et al. used fossilized pollen and leaves to characterize the changes that took place in northern South American forests at this time (see the Perspective by Jacobs and Currano). They not only found changes in species ...Germany is located at the centre of the map. Germany is located between the geologically very old ( Precambrian) East European Craton ( Baltica) to the north and north-east (that further north is exposed as the Baltic Shield ), and the geologically young (Cenozoic) Alpine - Carpathian Orogen to the south. The corresponding crustal provinces of ...The fossils were unearthed from the sandstone bed of the Upper Cretaceous Quantou Formation in Shanqian Village, Liufangzi Town, Gongzhuling City, Changchun Area, Jilin Province, China. Dromaeosaurids are small to medium-sized carnivorous dinosaurs, and they occur from the Early Cretaceous to the Late Cretaceous (Turner et al., 2012). Upper Cretaceous mixed carbonate-siliciclastic sequences are among the most important targets for hydrocarbon exploration in the Moghan area, located in the eastern Para-Tethys Basin. Despite of ...Despite this, species of carcharodontosaurians have been recovered from two lower Upper Cretaceous formations (Cenomanian and Turonian) of Asiamerica and include large taxa [5,6]. As the apex predators in these early Late Cretaceous ecosystems, their faunal associations with other predators, particularly tyrannosauroids, are poorly known.This study examined both vertical and lateral facies changes as well as petrographic characteristics of the outcropping section of the Upper Cretaceous Shendi Formation in the Musawwarat-Naga area ...The Upper Cretaceous sedimentary sequence exposed at the studied area was subdivided into seven sedimentary facies (from F1 to F7) exhibiting either coarse and/or fining asymmetrical cycles (Fig. 3). Facies from F1 to F4 are belonging to the Quseir Formation, while those from F5 to F7 are comprising the overlying Duwi Formation ( Fig. 3 ).tions of Early Cretaceous age and thirteen of Late Cretaceous age. The thickness of the entire Cretaceous section ranges between about 3,500 ft and 5,600 ft; within this range between 500 and 1,000 ft are Lower Cretaceous and the remainder are Upper Cretaceous. The entire section is thickest on the west, and thins eastward (Dyman and others, 1995).These dromaeosaurid postcranial remains have been found mainly in Upper Cretaceous strata of southern France (Le Loeuff et al. 1992; Le Loeuff and Buffetaut 1998; Allain and Taquet 2000;Chanthasit ...We describe a globally rare example of a tetrapod burrow from the Upper Cretaceous Bauru Group (Bauru Basin) from Peirópolis, Minas Gerais State, Brazil. The sedimentary succession containing the burrow includes a rich vertebrate assemblage comprising fish, podocnemid turtles, mesoeucrocodylians, saurischian dinosaurs, among others.stratigraphy and facies analysis of the upper cretaceous abu roash formation in abu roash area, giza, egypt Dr Hanan S Badawy Great thanks are due to Prof. Dr. Ahmed M. Abu Khadrah, Dean of the Faculty of Science, Cairo University for proposing the present point of research, kind supervision, continuous help, reading critically the manuscript ...For five years, Chip and Joanna Gaines dominated HGTV with the popular home remodeling series known as Fixer Upper. In that time, they transformed old — sometimes condemned — homes into dream homes for their clients, and viewers got to see ...PDF | One hundred permineralized cones, 1.0-1.2 mm x 1.5-2.0 mm, some attached to branching systems, have been examined from the Upper Cretaceous... | Find, read and cite all the research you need ...Upper GSSP ratified. 2002 [3] The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early/Lower Cretaceous Epoch / Series. Its approximate time range is 113.0 ± 1.0 Ma to 100.5 ± 0.9 Ma (million years ago).A sturgeon (Actinopterygii, Acipenseriformes) from the Upper Cretaceous of Africa. A single dorsal bony scute from the uppermost Cretaceous (Maastrichtian) marine phosphatites of central Morocco is identified as an acipenserid fish (sturgeon). The new specimen represents the first occurrence of an acipenseriform fish on the continent of Africa.Ichthyosaurs from the Upper Triassic (Carnian–Norian) of the New Siberian Islands, Russian Arctic, and their implications for the evolution of the ichthyosaurian basicranium and vertebral column ... (Upper Cretaceous) of the Volga Region, Russia. Cretaceous Research 2020-06 | Journal article DOI: 10.1016/j.cretres.2020.104419 Part …During the last three decades, several basal ceratopsians have been unearthed in Upper Jurassic and Lower Cretaceous strata in Asia and North America, including Yinlong downsi 1, Chaoyangsaurus ...Upper Cretaceous: Arkhangelskiella cymbiformis Vekshina, 1959 Campanian-Maastrichtian DSDP Site 249, Indian Ocean: XPL distal view: Arkhangelskiella cymbiformis Vekshina, 1959 Campanian-Maastrichtian Keswick, Norfolk, UK: oblique distal view SEM: Eiffellithus eximius (Stover, 1966) Perch-Nielsen, 1968... Upper Cretaceous (Senonian) formations. Figure 1 Facies map and schematic paleogeographic reconstruction of the Moroccan Atlas region during the Late ...Aerotitan sudamericanus, from the Upper Cretaceous of the Neuquén Basin (Patagonia, Argentina), is known from a partial jaw fragment which has been interpreted as either an azhdarchid upper jaw, azhdarchid lower jaw, or thalassodromine upper jaw (as the sister-group of Alanqa). Here, we compare it in detail to upper and lower jaws of taxa ...Preliminary study of a diverse dinosaur assemblage from the Upper Cretaceous of Zhuzhou, Hunan Province. Acta Palaeontol Sin. 56:1-9. [Google Scholar] Han FL, Xu X, Sullivan C, Huang LQ, Guo Y, Wu R. 2019. New titanosauriform (Dinosauria: sauropoda) specimens from the Upper Cretaceous daijiaping Formation of southern China. Peer J.First paleosol-derived climate data from continental Africa for the mid/Late Cretaceous. • Multi-proxy analysis using morphology, bulk geochemistry and δ 18 O of carbonates.. Lower-Upper Cretaceous paleosols record temperate conditions in Africa.Nevertheless, the Upper Cretaceous source rocks are mostly matured, but its hydrocarbon generation is limited because of lower TOC (only 0.5–0.8%) and thinner thickness (only 10 m). The main effective source rock is the AG Group in the Lower Cretaceous, which is distributed throughout the area.Upper Cretaceous aquifers. Upper Cretaceous aquifers of the Coastal Plain monocline in central and eastern Alabama are mainly barrier-island tidal inlet and shoreface paleoenvironmental facies within clastic dominated lithostratigraphic units, particularly Eutaw Formation, Blufftown Formation, Cusseta Sand, Ripley Sand, and Providence Sand. The Mount Eagle Group includes all the Upper Cretaceous sedimentary rocks and is composed of two interfingering facies, epiclastic volcanic sedimentary rocks and tuffaceous sedimentary rocks, both deposited below wave base in a marine environment. A turbidite sequence more than 8000 and perhaps 18,000 feet thick of epiclastic volcanic ...The Cretaceous* saw the first appearance and initial diversification of flowering plants (Angiosperms). Insects and other organisms soon evolve to take advantage of the new food sources and opportunities these plants provide. Conifers continued replacing seed ferns, ginkgos and cycads. Marine life flourished, with many groups achieving their peak abundances and diversity.Nemegt localities at area A. The Nemegt Formation (also known as Nemegtskaya Svita) is a geological formation in the Gobi Desert of Mongolia, dating to the Late Cretaceous. The formation consists of river channel sediments and contains fossils of fish, turtles, crocodilians, and a diverse fauna of dinosaurs, including birds.Cretaceous Period - Climate, Extinction, Dinosaurs: In general, the climate of the Cretaceous Period was much warmer than at present, perhaps the warmest on a worldwide basis than at any other time during the Phanerozoic Eon. The climate was also more equable in that the temperature difference between the poles and the Equator was about …The upper part of Member 1 (214-155 m) displays a general upwards. Summary and conclusions. Based on TOC and Rock-Eval pyrolysis data, oil shales and organic-rich mudstones of the Upper Cretaceous Qingshankou and Nenjiang formations in the Songliao Basin are excellent source-rocks for oil, containing Type I OM.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 ...Cretaceous Period, in geologic time, the last of the three periods of the Mesozoic Era. It began 145 million years ago and ended 66 million years ago and featured the extinction of the dinosaurs at the end …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 ...May 9, 2022 · 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 ... It is during the Cretaceous that the first ceratopsian and pachycepalosaurid dinosaurs appeared. Also during this time, we find the first fossils of many insect ...The SK-1 boreholes are situated on the Qijia-Gulong Depression, which was one of the major depositional centers in the basin. During the Upper Cretaceous, two major sedimentary settings of organic rich source rocks developed in the basin associated with the K 2 q 1 + 2 members of the Qingshankou Formation and. Abundance and types of organic ...Tröger K-A (1989) Problems of Upper Cretaceous inoceramid biostratigraphy and paleobiogeography in Europe and western Asia. In: Wiedmann J (ed) Cretaceous of the Western Tethys. Proceedings of the 3rd International Cretaceous Symposium Tübingen 1987. Schweizerbart, Stuttgart. Google Scholar Wani R, Gupta NS (2015) Ammonoid …Fossiliferous deposits of the Greenhorn Limestone (Upper Cretaceous) are found on the Comanche National Grassland in southeastern Colorado. The lowest portion of the Greenhorn Limestone, the base of the Lincoln Limestone Member, contains calcarenite beds rich in disarticulated remains of marine vertebrates. We examined the composition of the ...Selma Group of Late Cretaceous age; and the Midway, Wilcox, and Claiborne Groups of Tertiary age. However, stratigraphic units of late Eocene to Holocene age partially overlie and are hydraulically connected to clastic deposits in southern Alabama. These upper carbonate and clastic stratigraphic units alsoUpper Cretaceous. 1. Introduction. One of the most fundamental problems an animal faces is sensing its environment and detecting its food. Different strategies of food detection include visual, tactile (touch), auditory, olfactory, and gustatory foraging. Each has advantages and disadvantages. Vision is effective at sensing the environment and ...Pore and pore network evolution of Upper Cretaceous Boquillas (Eagle Ford-equivalent) mudrocks: Results from gold tube pyrolysis experiments AAPG Bulletin. Modeling the effects of microscale fabric complexity on the anisotropy of the Eagle Ford Shale Interpretation ...The Cretaceous-Paleogene (K-Pg) extinction event, also known as the Cretaceous-Tertiary (K-T) extinction, was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago. The event caused the extinction of all non-avian dinosaurs.Most other tetrapods weighing more than 25 kilograms (55 pounds) also became extinct, with the ...Detailed measured sections and regional stratigraphic cross sections are used to reconstruct facies maps and interpret paleogeographic settings for the interval from the base of Upper Cretaceous Mesaverde Formation to top of lower member of the Paleocene Fort Union Formation in the Wind River Basin, Wyoming. The Mesaverde Formation spans the time during which the Upper Cretaceous seaway retCretaceous: A Time of Chalk. Much chalk was deposited during the Cretaceous Period of geologic time. It was a time of global high sea levels that began at the end of the Jurassic Period about 145 million years ago and the beginning of the Paleogene Period about 66 million years ago. ... Upper Cretaceous Austin Chalk, U.S. Gulf Coast: by Krystal ...The Cretaceous period, which occurred from approximately 145 to 66 million years ago, was characterized by diverse and abundant plant life. Some common plants that lived during this period include: Cycads: These palm-like, cone-bearing plants were widespread during the Cretaceous and are still extant today.Clay-rich deposits of Upper Cretaceous levels in the Taveiro (Reveles and S. Pedro) and Aveiro (Bustos) regions of west-central Portugal are economically and environmentally important, but detailed chemical and mineralogical characterization is lacking. The purpose of this study was to partially fill that gap by correlating the trace-element geochemistry (particularly the rare earth elements ...Planktonic foraminifera are one of the most stratigraphically important groups of organisms for the Cretaceous system. However, standard foraminiferal zonations based mostly on species from the Tethyan bioprovince are hardly applicable in temperate regions where warm-water taxa are scarce or lacking. We propose a foraminiferal zonation based on foraminiferal events recognized in the northern ...Planktonic foraminifera are one of the most stratigraphically important groups of organisms for the Cretaceous system. However, standard foraminiferal zonations based mostly on species from the Tethyan bioprovince are hardly applicable in temperate regions where warm-water taxa are scarce or lacking. We propose a foraminiferal zonation based on foraminiferal events recognized in the northern ...The Yogou Formation of the Upper Cretaceous is a potential source rock in the Termit Basin of Niger, and the TOC content of the upper member is 1.8-9 times that of the lower member. However, the influence of the sedimentary environment evolution on its organic matter heterogeneity is still unclear. In this paper, the evolution of the ...Dec 22, 2022 · The Upper Cretaceous (Turonian) Bissekty Formation of Uzbekistan has yielded many isolated bones and teeth representing a variety of non-avian theropod dinosaurs. A pedal phalanx II-2 indicates the presence of a dromaeosaurid theropod that attained a larger body size than any previously known member of that clade. Here we report on a new dromaeosaurid, Dineobellator notohesperus, gen. and sp. nov., consisting of a partial skeleton from the Upper Cretaceous (Maastrichtian) of New Mexico, the first diagnostic ...The Upper Cretaceous to Oligocene strata of the Cuesta de Huaco anticline in the Argentine Precordillera record sedimentation, regional deformation, and climate patterns prior to the highly ...The Yezo Group, and other Upper Cretaceous units in Japan, have yielded various marine vertebrates from all stages, although fragmentary remains dominate the fossil record (e.g, Obata et al., 1972; Sato et al., 2012). Further careful search for pliosaurid remains in these strata are necessary to verify whether the demise of the pliosaurids also ...The pre-rift sediments of the Gulf of Suez Basin were deposited in continental margin sags. The first subsidence cycle deposited clastic Nubia Formation during Carboniferous-Lower Cretaceous period, while the second subsidence cycle commenced from Upper Cretaceous and deposited mixed siliciclastic-carbonate sediments (Atia et al. 2015).The Cretaceous Continental Scientific Drilling borehole in the Songliao Basin (CCSD-SK-I) (Wang et al., 2008, Wang et al., 2012, Feng et al., 2012), which consists of two borehole cores (that is, the north core and the south core) (Fig. 1 A), offers a unique opportunity for probing into the nature of the terrestrial Cretaceous world.This study aims to establish a chronostratigraphical ...Legend: 1, pre-Upper Cretaceous-Mesozoic; 2, Upper Cretaceous; 3, Arenisca de Arén Fm., 4, Tremp Fm., 5, Lower Eocene; 6, Upper Palaeogene; 7, recent fluvial valleys. The third locality, Julı́, near Isona (Lleida), is a dark marl with complete shells of Melanopsis near the base of the `Xulı́' beds of Liebau (1973) , lying above La Posa ...Fluvial deposits of the Kaiparowits Formation at "The Blues". The Kaiparowits Formation is a sedimentary rock formation found in the Kaiparowits Plateau in Grand Staircase–Escalante National Monument, in the southern part of Utah in the western United States.It is over 2800 feet (850 m) thick, and is Campanian in age. This Upper …Thorough sedimentological and palaeontological analyses of four expanded Upper Cretaceous sections in northern Tademait had allowed us to address and reconsider the stratigraphical framework of the so-called 'Continental Intercalary' and 'Hamada series' in this remote Saharan area. These four sections (i.e., Meguidene, Gara Samani, Oued El Mezaourou-Gour Louazouaza, and El Menia ...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 ...Scientific Reports - A new ankylosaurid skeleton from the Upper Cretaceous Baruungoyot Formation of Mongolia: its implications for ankylosaurid postcranial evolutionBackground 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 ...Field investigation, Microfacies analysis, and biostratigraphy have been carried out in the central parts of the Ionian Basin (Aetoloakarnania area, Western Greece) in order to decipher the depositional environments that developed during the accumulation of the Upper Cretaceous to Eocene carbonate succession. Three different Standard Microfacies types (SMF) have been observed, corresponding to ...Selma Group of Late Cretaceous age; and the Midway, Wilcox, and Claiborne Groups of Tertiary age. However, stratigraphic units of late Eocene to Holocene age partially overlie and are hydraulically connected to clastic deposits in southern Alabama. These upper carbonate and clastic stratigraphic units alsoFrom a study of silicified fossils, and in particular the microstructure of brachiopods, from the Wilmington Sands (Upper Cretaceous) of Devon, a model of skeletal silicification is proposed. Three distinct morphologies of silica were formed, ...For five years, Chip and Joanna Gaines dominated HGTV with the popular home remodeling series known as Fixer Upper. In that time, they transformed old — sometimes condemned — homes into dream homes for their clients, and viewers got to see ...Description Restoration of the skull. Although perhaps little larger than a Virginia opossum, with a skull length of 12.2 centimetres (4.8 in) and a weight of 5.2 kilograms (11 lb), Didelphodon was the largest Cretaceous mammal. The teeth have specialized bladelike cusps and carnassial notches, indicating that the animal was a predator; the jaws are …Our study builds on an earlier examination of the landscape abundance of megaherbivorous dinosaurs of the Upper Jurassic Morrison Formation of the western United States (Farlow et al., 2010), but now considers the abundance of Morrison large theropods, and extends consideration to the tyrannosaurids of the Upper Cretaceous Dinosaur Park .... Thirty-four core shale samples from the UpperThe Upper Cretaceous-Eocene succession in the st Germany is located at the centre of the map. Germany is located between the geologically very old ( Precambrian) East European Craton ( Baltica) to the north and north-east (that further north is exposed as the Baltic Shield ), and the geologically young (Cenozoic) Alpine - Carpathian Orogen to the south. The corresponding crustal provinces of ...May 11, 2021 · Ootaxa placed within Laevisoolithidae have previously been described from the Upper Cretaceous of India, Mongolia, Morocco, as well as the Lower Cretaceous of Japan and include Laevisoolithus ... Pore and pore network evolution of Upper Cretaceous Boquillas ( May 3, 2022 · The Yezo Group is composed of mainly Upper Cretaceous marine sediments and rich in invertebrate and vertebrate fossils, including sharks, plesiosaurs, mosasaurs, turtles, pterosaurs, non-avian ... 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. The Cenomanian is, in the ICS ' geologic...

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