Upper cretaceous

The irregular spatial distribution is explained by the fac

Cretaceous Period - Mesozoic, Paleogene, Cenozoic: The rocks that were either deposited or formed during the Cretaceous Period make up the Cretaceous System. The Cretaceous System is divided into two rock series, Lower and Upper, which correspond to units of time known as the Early Cretaceous Epoch (145 million to 100.5 million years ago) and the Late Cretaceous Epoch (100.5 million to 66 ...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 ...Outcrop images of the Upper Jurassic-Lower Cretaceous carbonate succession from the southern part of the Postăvaru Massif. a General view of the Muchia Cheii ridge.b Upper Jurassic massive limestones from Poiana Brașov (central Postăvaru Massif).c Decimeter-meter thick carbonate beds from the upper part of the Drumul Roșu section (white lines).

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The specimen was discovered in the Upper Cretaceous strata of the Huincul Formation (middle Cenomanian-lower Turonian). It includes appendicular and relatively slender elements, with a femoral total length of about 1.9 m long. This taxon shows a unique combination of characters indicating that appendicular bones such as the femur, ischium and ...Upper Cretaceous of California 235 Within California, but outside of the Chico Formation, the strat~graphic disv~ bution of Baculites capensis is poorly understood. As discussed earlier, the ranges of H. venustum and Baculites capensis overlap slightly on Mill Creek and Big Chico Creek. Collections from the Redding area, specifically UCLA ...The Maastricht Formation (Dutch: Formatie van Maastricht; abbreviation: MMa), named after the city of Maastricht in the Netherlands, is a geological formation in the Netherlands and Belgium whose strata date back to the Late Cretaceous, within 500,000 years of the Cretaceous–Paleogene boundary, now dated at .The formation is part of the Chalk …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 ... The Late Cretaceous (100.5-66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series.The Cretaceous is named after creta, the Latin word for the white limestone known as chalk.The chalk of northern France and the white cliffs of south-eastern England date from the Cretaceous Period.Paleoenvironmental changes recorded in the Santa Marta Formation (Santonian—Campanian, Upper Cretaceous), James Ross Island, Antarctica, inferred from palynofacies analyses. Gustavo Santiago, Marcelo de Araujo Carvalho, Renato Rodriguez Cabral Ramos, Sandro Marcelo Scheffler. In Press, Journal Pre-proof, Available online 28 September 2023.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.Hunt, C.O. 1987. Dinoflagellate cyst and acritarch assemblages in shallow-marine and marginal-marine carbonates: the Portland Sand, Portland Stone, and Purbeck Formations (Upper Jurassic/Lower Cretaceous) of southern England and northern France. In: Hart, M.B. (ed) Micropalaeontology of Carbonate Environments.We divide Upper Jurassic–Lower Cretaceous strata of the broadly defined Bisbee basin into five regionally correlative tectonostratigraphic assemblages (TSAs; Fig. 2). Tectonostratigraphic assemblages “record phases of basin history during which the fundamental controls of tectonic setting, subsidence style, and basin geometry are relatively ...The landscape at El Anfiteatro area comprises a natural depression situated at the foot of the northern escarpment of the Meseta de Rentería (Fig. 1), which displays an impressive sequence of continental sediments of the Upper Cretaceous assigned to the Neuquén Group (Cazau and Uliana, 1973).This sequence incorporates a set of predominant fluvial deposits, associated aeolic and lacustrine ...Two silicified fossil woods from outcrops of the Cerro Fortaleza Formation (Campanian, Upper Cretaceous) in Los Hornos Hill, Santa Cruz Province, Argentina are described. Based on their anatomical characteristics, both specimens were assigned to a new species of the fossil genus Brachyoxylon Hollick and Jeffrey, B. patagonicum sp. nov. They are characterized by having distinct growth ring ...Liu, B. et al. Algal-microbial community, paleoenvironment, and shale oil potential of lacustrine organic-rich shale in the upper Cretaceous Nenjiang formation of the southern central depression ...The Upper Cretaceous Toyajo Formation is distributed around the Mt. Toyajo in the Aridagawa area, Wakayama, southwestern Japan. The formation is subdivided into three newly defined members, the Nakaibara Siltstone Member, Hasegawa Muddy Sandstone Member, and Buyo Sandstone Member, in ascending order. ...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 ...According to Skourtsis-Coroneou et al. (1995) the Upper Cretaceous deposits, mentioned as "clastic limestones" from the western to eastern part, from the external to internal Ionian zones, consist of: A. In the external (western) parts have a micritic matrix, consist of floatstones, rudstones and rare grainstones and packstones with micritic or biomicritic intercalations.Upper Jurassic (Oxfordian) Smackover Formation is a source of hydro-carbon. In eastern Texas and western Louisiana to the south where the Eagle Ford is thin to absent, hydrocarbons in the Austin Chalk are derived from sources in older Upper Cretaceous rocks (Hood and others, 2002). Hydrocarbons migrated into conventional reservoirs in the AustinLocalised magmatism is reported from northern Sumatra and the Ranong and Khlong Marui faults in southern Thailand were active during the Late Cretaceous and Paleocene, parallel to this orientation, suggesting deformation in the upper plate above the subducted transform. Download : Download full-size image; Fig. 24. Reconstruction at 65 Ma ...Sections of the Upper Cretaceous (Coniacian to Campanian) Niobrara Formation in two cores from Kansas and Colorado, the Amoco Rebecca Bounds and USGS Portland 1, respectively, were examined by hyperspectral core imaging and analysis. A spectral imaging system combining high-resolution photography (50 μm), 3D laser profiling (20 μm), and near-visible + short-wave infrared reflectance spectroscopyRequest PDF | On May 1, 2014, Lida Xing and others published Upper Cretaceous dinosaur track assemblages and a new theropod ichnotaxon from Anhui Province, eastern China | Find, read and cite all ...Upper Cretaceous Stratigraphy and Depositional Environments of Western Kansas by Donald E. Hattin, Indiana University, and Charles T. Siemers, Cities Service Company Assisted by Gary F. Stewart, Oklahoma State University. Originally published in 1978 as Kansas Geological Survey Guidebook 3. The book was reprinted in 1987 with some modifications.In addition, U-Pb detrital zircon age spectra within the upper Xigaze forearc stratigraphy are similar to those from Eocene foreland basin strata south of the Indus-Yarlung suture near Sangdanlin, suggesting that the Xigaze forearc was a possible source of Sangdanlin detritus by ca. 55 Ma. We propose a model in which the Xigaze forearc ...The Lower Cretaceous (Albian) Kharita Formation is composed of sandstone interbedded with shales and siltstone. The Upper Cretaceous (Cenomanian) Bahariya Formation consists mainly of sandstone, with thin streaks of shales and limestone (Kandil 2003). The sandstones are the main gas and/or condensate pay zone.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 …Show abstract. PDF | On Jan 1, 1998, J.A. Burnett published Upper Cretaceous | Find, read and cite all the research you need on ResearchGate.The Bohemian Cretaceous Basin was an intIsopach maps of Upper, Middle, and Lower Ages of the Upper Cretaceous formations of the Gobi are based on comparisons of the vertebrates with those of North American non-marine units, which are constrained by ammonite and palynological biozonations and calibrated by chronostratigraphical methods (Gradzinski et al., 1977, Fox, 1978, Lillegraven and McKenna, 1986, Jerzykiewicz and ...Tectonism during the early Cretaceous in western North America resulted in the development of a foreland basin and formation of the Western Interior Seaway (e.g. Burchfiel et al., 1992). By Maastrichtian times, this epeiric sea linked the polar ocean and the subtropical Gulf of Mexico . The Upper Cretaceous succession currently exposed in the ... Additional publication details. Part or May 9, 2022 · 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. Titanosauriform sauropod dinosaurs were once

Upper Cretaceous sections at the Tanama River are located on the Sigirte-Nado elevation, surrounded by the Tanama River from the west, north, and east (Fig. 3 B). The Tanama River is the left-bank tributary of the Yenisei River. It is located in the north-eastern part of the West Siberian sedimentary basin (e.g. Kontorovich et al., 2014).The Cretaceous Period was a time of great inundation by shallow seas that created swamp conditions favourable for the accumulation of fossil fuels at the margin of land areas. ... Another rock type, called the Urgonian limestone, is similarly widespread in the Upper Barremian-Lower Aptian. This massive limestone facies, whose name is commonly ...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, ...The Upper Cretaceous Mesaverde Group in the Piceance Basin, western Colorado, contains thick sections of low porosity, low permeability sandstones that are reservoirs for large accumulations of hydrocarbon gas. The Mesaverde sandstones are lithic arkoses and feldspathic litharenites, containing quartz, plagioclase, variable K-feldspar, chert ...

Scientific Reports (2016) Tyrannosaurids were top predators in Asia and North America during the latest Cretaceous and most species had deep skulls. Here, Lü et al. describe mature fossils of ...Taxonomy and paleoecology of lyssacinosan Hexactinellida from the Upper Cretaceous (Coniacian) of Bornholm, Denmark, in comparison with other Postpaleozoic representatives. Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft , ……

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. A new troodontid dinosaur, Papiliovenator neimengguensi. Possible cause: Four pliosaurid fossils from Japanese Upper Cretaceous are described/redescrib.

A new genus and species of tetrablemmid spider, Electroblemma bifida n. gen. et sp., is described, from two adult males found in Upper Cretaceous (Cenomanian) amber of Myanmar. The genus is distinguished by its enormous dorsal carapace projection and highly modified chelicerae.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).Zonal and marker species of radiolarians from Upper Cretaceous sequences of eastern Europe: 1Spongosaturninus hueyi Pessagno; 2Neosciadiacapsa agarkovi Vishnevskaya; 3Rhombastrum russiense Vishnevskaya, Rostov region, right coast of the Kalitva River, Efremovo-Stepanovka, upper Campanian; 4 N. diabloensis Pessagno ( 1, 2, and 4 from Greater ...

Upper Cretaceous Stratigraphy and Depositional Environments of Western Kansas by Donald E. Hattin, Indiana University, and Charles T. Siemers, Cities Service Company Assisted by Gary F. Stewart, Oklahoma State University. Originally published in 1978 as Kansas Geological Survey Guidebook 3. The book was reprinted in 1987 with some modifications.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 ...The results obtained from the analysis of the Upper Cretaceous source rocks show that; the TOC (Total Organic Carbon) value varies from 1.01 wt % to 2. 09 wt %, that of IH (hydrogen index) varies ...

Cretaceous deposits in the area have prev These variations result from the reactivation of an ante-Cretaceous NE-SW to E-W preexisting fault, which has controlled the sedimentation of the Cretaceous series in an N-S direction. Likewise, this tectonic inheritance is associated to a well pronounced synsedimentary tectonic activity, which is clearly involved in the structuring of Upper ... The Cretaceous Continental Scientific Drilling borehole in thAdditional resources. The Cretaceous period was the last a The Hell Creek Formation is an intensively studied geological formation of mostly Upper Cretaceous and some Early Paleocene rocks in North America, named for exposures studied along Hell Creek, near Jordan, Montana. The formation stretches over portions of Montana, North Dakota, South Dakota, and Wyoming. In Montana, the Hell Creek Formation ... Upper Cretaceous and Lower Cretaceous aquifers are transboundary aquifers which extend outside the political east boundary of Egypt to Negev, in Palestine (Issar et al. 1972; Nour 1998). The Upper Cretaceous limestone and the Lower Cretaceous sandstone aquifers extend in central and northern Sinai and are the main source of water in this area. The Upper Cretaceous Nenjiang lacustrine shale (K 2 n) Following a multi-proxy analysis of the Upper Cretaceous high-productivity sequence from proximal and distal basins in Israel, Meilijson et al. (Paleobiology 42:77–97, 2016) provided evidence ...Two species of the heteromorph ammonite genus Diplomoceras Hyatt are described from the Upper Cretaceous of the James Ross-Seymour Islands area, Antarctica. The late Campanian-early Maastrichtian D. lambi Spath has a relatively high rib density, whereas D. maximum n. sp. has a lower rib density and is known only from the uppermost Maastrichtian of the Lopez de Bertodano Formation on ... Further offshore are the Upper Cretaceous depocentres of the MorumAbstract and Figures. A new carcharodontosaIn the early Cretaceous, many of the sout The Upper Cretaceous Mesaverde Group in the Piceance Basin, western Colorado, contains thick sections of low porosity, low permeability sandstones that are reservoirs for large accumulations of hydrocarbon gas. The Mesaverde sandstones are lithic arkoses and feldspathic litharenites, containing quartz, plagioclase, variable K-feldspar, chert ...The fossils were excavated from Upper Cretaceous strata of the Jiangjunding Formation (Wangshi Group) in Shandong Province, and although their discovery dates back almost 100 years, they have not ... The provenance of the Upper Cretaceous Nubia sand The Upper Cretaceous theropod fossil record in Europe. Upper Cretaceous (Turonian-Maastrichtian) theropod sites in the European archipelago are mainly located in central and eastern Europe (Austria, Bulgaria, Hungary, Romania and the European part of Russia) and the Ibero-Armorican domain (France, Spain and Portugal). ... The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into w[Home · Scientific Publications · American MuMeniscoessus robustus – Named by Othniel C Winton Formation. / -22.3; 143.1. / -51.8; 134.1. The Winton Formation is a Cretaceous geological formation in central-western Queensland, Australia. It is late Albian to early Turonian in age. [2] The formation blankets large areas of central-western Queensland. It consists of sedimentary rocks such as sandstone, siltstone and claystone.