Upper cretaceous.

Research highlights The provenance of upper Cretaceous strata in the Tethys Himalaya provides significant constraints on the closing of the Neo-Tethys Ocean and the initial India–Asia collision. We carried out a detailed provenance study on the upper Cretaceous clastic sedimentary rocks of the northern Tethys Himalaya, near Gyangze, …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.Aug 18, 2021 · The carapace length of other turtles from the Upper Cretaceous of China is typically no more than 50 cm . Therefore, the estimated carapace length based on egg size of CUGW EH051 is most compatible with the size range of Nanhsiungchelyidae and Khunnuchelys , although not definitive for identifying the egg's affinity. Aug 15, 2022 · Mo et al. (2020) also found PAHs compounds (e.g., retene, pyrene, perylene, benzo[h]fluoranthenes, benzo-pyrene) in the Upper Cretaceous Nenjiang Formation in Well JTD1 from the Western Slope Area in the Songliao Basin, which they interpreted to be from terrestrial inputs. Download : Download high-res image (505KB) Download : Download full-size ... 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.

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.Thirty-four core shale samples from the Upper Cretaceous Mamu Formation, southeastern Nigeria, were studied using XRD and geochemical analyses to constrain their provenance, tectonic setting, palaeoweathering and palaeoredox conditions during deposition.X-ray diffraction analysis revealed the presence of clay minerals (kaolinite, illite and illite-smectite mixed layer) and non-clay minerals ...

Despite the abundant literature on limnic Cretaceous ostracode faunas, the database on mid-Late Cretaceous taxa is still scarce. The Songliao Basin in northeastern China preserves a diverse assemblage of ostracode fossils from the Santonian-Campanian Nenjiang and Sifangtai formations.

The Cretaceous sedimentary basins in Mongolia are grouped into three major depositional provinces (Altai, Khangai-Khentei and Gobi) with ten basins (basins of Great Lakes, Valley of Lakes, Arkhangai, Onon, Choir-Nyalga, Choibalsan, Transaltai Gobi, Umnogobi, Dornogobi and Tamsag), which are all filled by continental deposits with abundant vertebrate and invertebrate fossils as well as plant ...Nishida M, Nishida H (1985) Petrified woods from the Upper Cretaceous of the Quirquina Island. In Nishida M (ed) A Report of the Botanical Survey to Bolivia and Southern Chile by a Grant-in-Aid for Overseas Scientific Survey, 1983. Faculty of Science, Chiba University. Hasedate Printing Co., Chiba, Japan., pp. 27–36. Google ScholarSep 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 Cretaceous strata are either devoid of microfauna or contain few agglutinated taxa suggestive of continental to brackish water settings. The development of calcareous benthic foraminiferal assemblages in Paleogene strata of the study area signaled the incursion of open marine neritic conditions. Influx of sandy sediments at some ...In Antarctica, a distinct fossil foliage was associated with Coniopteris in levels older than the beginning of Jurassic, mainly in the Antarctic Peninsula and including the Lower Cretaceous deposits of Alexander Island (Cantrill and Nichols, 1996; Cantrill and Nagalingum, 2005), and those from the Upper Cretaceous of Livingston, at South ...

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 ...

Oct 18, 2023 · Cretaceous Period, in geologic time, the last of the three periods of the Mesozoic Era. The Cretaceous began 145.0 million years ago and ended 66 million years ago; it followed the Jurassic Period and was succeeded by the Paleogene Period (the first of the two periods into which the Tertiary Period was divided).

Feb 1, 2022 · Abstract. A new troodontid dinosaur, Papiliovenator neimengguensis gen. et sp. nov., from the Upper Cretaceous (Campanian) Wulansuhai Formation at Bayan Manduhu, Inner Mongolia, China, is described here. The holotype (BNMNH-PV030) consists of a nearly complete cranium and fragmentary postcranial bones in semi-articulation and this specimen is ... The Turonian is, in the ICS' geologic timescale, the second age in the Late Cretaceous Epoch, or a stage in the Upper Cretaceous Series.It spans the time between 93.9 ± 0.8 Ma and 89.8 ± 1 Ma (million years ago). The Turonian is preceded by the Cenomanian Stage and underlies the Coniacian Stage.. At the beginning of the Turonian an oceanic anoxic …The Upper Cretaceous-Paleocene turbiditic deposits of the Skole Nappe are distinguished as the Ropianka Formation (formerly as the noceramian Beds), which are at least 500 m thick (Wdowiarz, 1949; Kotlarczyk, 1978).They are overlain by the mudstone-dominated Upper Paleocene-Eocene Variegated Shale Formation (Rajchel, 1990).The Bąkowiec section of the Ropianka Formation (Leszczyny Member ...Apr 15, 2014 · The Cretaceous is divided into Early and Late Cretaceous epochs or Lower and Upper Cretaceous series. In older literature the Cretaceous is sometimes divided into three series: Neocomian (lower/early), Gallic (middle) and Senonian (upper/late). A subdivision in eleven stages, all originating from European stratigraphy, is now used worldwide. Lower Campanian (Upper Cretaceous) ammonites from the Merchantville Formation of New Jersey, Maryland, and Delaware W. J. Kennedy; W. J. Kennedy Oxford University Museum, Geological Collections, Oxford, England, United Kingdom. Search for other works by this author on: GSW.Distribution The Western Interior Seaway that covered North America during the Cretaceous. Species of Inoceramus had a worldwide distribution during the Cretaceous and Jurassic periods (from 189.6 to 66.043 Ma). Many examples are found in the Pierre Shale of the Western Interior Seaway in North America. Inoceramus can also be found …

Cretaceous deposits in the area have previously produced dinosaur fossils, and the Paleocene occasionally contains reworked Upper Cretaceous fossils. Based on observations of several short-lived, partial exposures in the greater vicinity (e.g., MMNS locality MS.73.030), a persistent phosphatic fossil assemblage occurs in the uppermost part of ...The giant tyrannosaurids were the apex predators of western North America and Asia during the close of the Cretaceous Period. Although many tyrannosaurid species are known from numerous skeletons representing multiple growth stages, the early evolution of Tyrannosauridae remains poorly known, with the well-known species temporally restricted to the middle Campanian-latest Maastrichtian (∼77 ...Thanks to the Internet, it’s easier than ever to watch your favorite shows. Fortunately, all you need is an Internet connection, and you can watch on your computer, handheld device or through an Internet connection on your TV. Use the follo...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 ...Meanwhile King George Island, at North, contains an Upper Cretaceous to Miocene fossiliferous succession (Birkenmajer, 1980; Shen Yanbin, 1994). This age data seems to confirm the yonging of the lithologies from south to north in western Antarctic Peninsula, as was proposed, among others, by Thompson (1992) and Birkenmajer et al. (1986).Paleogene Period. 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 ...

Nishida M, Nishida H (1985) Petrified woods from the Upper Cretaceous of the Quirquina Island. In Nishida M (ed) A Report of the Botanical Survey to Bolivia and Southern Chile by a Grant-in-Aid for Overseas Scientific Survey, 1983. Faculty of Science, Chiba University. Hasedate Printing Co., Chiba, Japan., pp. 27–36. Google ScholarThe study area is located in the Rosario Embayment on the Pacific coast of Baja California, Mexico (Fig. 1 a and b).The Rosario Embayment consists of Upper Cretaceous to Palaeocene sedimentary rocks that constitute part of the Peninsular-Ranges fore-arc basin complex (Morris and Busby-Spera, 1990).Sediments within the fore-arc basin were sourced from the Upper Jurassic to Upper Cretaceous ...

This upper Cretaceous source provides good oil source rocks in most parts of The Western Desert and moderate-quality gas source rocks in the Umbaraka area. Significant amounts of oil believed to have been generated from this source, are located in the Abu Gharadig and Gindi basins (Schlumberger 1995). Typical oil source rocks are present in non ...The Cretaceous is divided into Early and Late Cretaceous epochs, or Lower and Upper Cretaceous series. In older literature the Cretaceous is sometimes divided into three series: Neocomian (lower/early), Gallic (middle) and Senonian (upper/late). A subdivision in eleven stages, all originating from European stratigraphy, is now used worldwide. ...Mesaverde Formation or Mesaverde Group (Upper Cretaceous) at surface, covers 1 % of this area. Mesaverde Formation (north Wyoming) - Light-colored massive to thin-bedded sandstone, gray sandy shale, and coal beds. In Jackson Hole locally contains gold-bearing quartzite conglomerate. North of North Fork Powder River east of the Bighorn Mountains ...Sep 21, 2023 · Introduction. 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 Citation 2010; Wang et al. Citation 2013; Wei et al. Citation 2013; Lü et al. Citation 2013a, Citation 2014, Citation 2015, Citation 2016, Citation 2017; Mo and Xu Citation 2015), ornithopods (Xing et al. Citation ... 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 ...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).The sedimentary facies of the Upper Cretaceous to Eocene succession consist of turbidite and sandstones, suggesting that they were deposited in the deep sea portions of submarine-fans and basin ...The Upper Cretaceous Nenjiang lacustrine shale (K 2 n) is one of the most essential hydrocarbon source rocks in NE China with massive OM deposition across the Santonian-Campanian boundary interval, which can be correlated with the terminal stage of the last oceanic anoxic event in the Cretaceous, OAE3. This study focuses on the lower part of ...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 ...

The Upper Cretaceous Lameta (~infratrappean) Formation of the Jabalpur area (Madhya Pradesh, Central India) preserves one of the most diverse Late Cretaceous reptilian assemblages (largely dominated by dinosaurs) and other significant biotic elements of the Indian subcontinent. The Lameta Formation in the Jabalpur region comprises excellent ...

Upper Cretaceous to Paleogene nonmarine sedimentary rocks of southwest Utah record Sevier foreland basin sedimentation, Laramide-style folding and intermontane sedimentation, and cessation of Laramide deformation. The formations that record this tectonic evolution arc, from oldest to youngest, the Iron Springs, Kaiparowits, Canaan Peak, Grand ...

Maiasaura (from the Greek μαῖα, meaning "good mother" and σαύρα, the feminine form of saurus, meaning "reptile") is a large herbivorous saurolophine hadrosaurid ("duck-billed") dinosaur genus that lived in the area currently covered by the state of Montana and the province of Alberta, Canada, in the Upper Cretaceous Period (mid to late Campanian), about 76.7 million years ago.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 ... If this is the case, then Gryphoceratops is the smallest adult-sized ceratopsian known from the Upper Cretaceous of North America and one of the smallest known ornithischians. More complete leptoceratopsid specimens from the Milk River Formation are required to clarify the taxonomic relationships and adult size of Gryphoceratops.The Upper Cretaceous ammonite Pseudaspidoceras Hyatt, 1903, in north-eastern Nigeria. Bulletin of The Natural History Museum, London, Geology Series, 51 (1995), pp. 53-72. View in Scopus Google Scholar. 50. P.M.P. Zaborski. The Upper Cretaceous ammonite Vascoceras Choffat, 1898, in north-eastern Nigeria.Positive δ 13 C carb and δ 13 C org excursions occur in the mid-Cretaceous black shales (Wang et al., 2001), while negative δ 13 C carb and δ 13 C org excursions take place in the Upper Cretaceous red-beds, coincident with lower fractions of biogenic barite (Wang et al., 2005, Zou et al., 2005). These differences point to lower primary ...The Upper Jurassic-Lower Cretaceous strata, known as the Shamuluo or Rina Formation, overlying the subduction-accretionary complex, is a terrigenous clastic-carbonate rocks over 800 m thick, and contains Spongiomorpha sp., corals, sponges, ammonites, and foraminifera and plant fossils, and the gravels which consists of basic-ultrabasic rocks ...Jan 19, 2023 · The Lo Hueco fossil site (Cuenca, Spain) is one of the most relevant localities for the study of Late Cretaceous continental vertebrate faunas from Europe. The fossil record of theropod dinosaurs from this locality is represented by scarce isolated postcranial materials that were preliminarily attributed to abelisaurids and to a possible giant bird, in addition to a large assemblage of ... Goannas evolved in the northern hemisphere in the Upper Cretaceous Period about 90 million years ago. Discover more. Australia through time. This self-led activity gives students a taste of both the cultural and natural history exhibitions at the Museum as they create their own digital story about ‘Australia through time’.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 ...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 ... Cretaceous Period. During this period, oceans formed as land shifted and broke out of one big supercontinent into smaller ones. Continents were on the move in the Cretaceous, busy remodeling the ...

Theropod and other dinosaurian tracks from the upper Lower Cretaceous of northeastern China: overlooked Fuxin Biota records reinvestigated. , Cretaceous Research, 135 105190, 1-9Ceratopsids are among the most ubiquitous dinosaur taxa from the Late Cretaceous terrestrial formations of the Western Interior of North America, comprising two subfamilies, Chasmosaurinae and Centrosaurinae. ... Dinosaur census reveals abundant tyrannosaurus and rare ontogenetic stages in the upper Cretaceous Hell Creek Formation ...The provenance of upper Cretaceous strata in the Tethys Himalaya provides critical constraints on the closure time of the Neo-Tethys Ocean and the initial India-Asia collision. This paper reports detailed petrographic studies, in-situ detrital zircon U-Pb ages and Lu-Hf isotopic analyses, whole rock Nd-isotopes, and Cr-spinel electronic microprobe data from upper Cretaceous clastic ...Instagram:https://instagram. bachelors of science in economicsaleks scoresds3 soft capsselect the antivirus companies from the following The Upper Cretaceous aquifer of Cretaceous age is a regionally extensive but relatively little-used aquifer in the northern Mississippi embayment. Throughout much of its area of occurrence, this aquifer is the deepest freshwater source available. Because it is commonly overlain by high- average bank teller paycraigslist coeur d alene spokane 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, ... chroma razer profiles The upper part of the Upper Cretaceous strata is named the Bada Formation, which conformably overlies the Jingzhushan Formation and is mainly composed of coarse sandstone and conglomerate. The Paleocene strata are absent in the Dingqing area, and the Eocene Zongbai Formation unconformably overlies the Upper Cretaceous Bada Formation directly ...Importantly, the age of Cretaceous alteration recorded in vitrophyre pod samples is indistinguishable from regional Cretaceous alteration previously documented by 40 Ar/ 39 Ar geochronology of ...Jul 13, 2016 · 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 ...