The specimen comes from the upper part of the Candeleros Formation, Upper Cretaceous (Cenomanian, circa 98 Ma, Garrido, 2010) (Fig. 1). 4. Description4.1. Caudal vertebrae. The preserved caudal sequence is composed of 24 vertebrae lying on their left side, corresponding to approximately the anterior half of the tail (Fig. 2). The collected ...We describe the new basal abelisauroid dinosaur Austrocheirus isasii gen. et sp. nov. from the Late Cretaceous Pari Aike Formation of southwestern Patagonia, Argentina. The preserved remains include manual bones, a distal tibia, and some pedal and axial elements. Austrocheirus is differentiated from other basal theropods by the presence of metacarpal III with a dorsoventrally compressed shaft ...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]Upper Cretaceous paleoenvironmental changes and petrophysical responses in lacustrine record (Songliao Basin, NE China) and marine sedimentary deposit (Goban …of the fossils. I recognized several well-known Upper Cretaceous species. (Matthes, 1933, p. 1007-1009.} A collection made from the oolitic clay in Janu ary 1933 by Willard Farrar of the Missouri Geological Survey and Water Resources showed that, in addition to the. Cretaceous fossils, the clay contained severalThe Upper Cretaceous (Campanian-Maastrichtian) forearc turbidites are up to 1,200 m thick and crop out in NW-SE trending elongate basins about 40 km wide, …It is a subdivision of the Early or Lower Cretaceous Epoch or Series and encompasses the time from 121.4 ± 1.0 Ma to 113.0 ± 1.0 Ma (million years ago), approximately. The Aptian succeeds the Barremian and precedes the Albian, all part of the Lower/Early Cretaceous. The Aptian partly overlaps the upper part of the Western European Urgonian Stage.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 ...3 de mai. de 2022 ... Fragmentary therizinosaur specimens have been reported from the Lower and Upper Cretaceous deposits in Japan. One of these specimens, from the ...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 ...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 ...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.Further offshore are the Upper Cretaceous depocentres of the Morum, Nelson and Hunter sub-basins, and the Discovery Bay High (Totterdell et al, 2014). The Torquay Sub-basin, a largely offshore depocentre, is situated in the northeastern part of the basin and contains a Lower Cretaceous succession similar to that elsewhere in the basin.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 …Nov 25, 2021 · A new ankylosaurid dinosaur, Tarchia tumanovae sp. nov., has been recovered from the Upper Cretaceous Nemegt Formation of Mongolia. It includes a well-preserved skull, dorsal, sacral, caudal ... 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, …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 ... The bauplan of the Nursalliini seems to be much more constant, remaining almost unchanged throughout their stratigraphic distribution, including the species from the beginning of the Upper Cretaceous (1: Nursallia goedeli of the Cenomanian of Haqel, Lebanon; TL = 260 mm), up to those of the Middle Eocene (2: Nursallia veronae from the …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 ...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. 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. 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). ...Jul 5, 2023 · 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. 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).For the Upper Cretaceous they are the Cenomanian, Turonian, Coniacian, Santonian, Campanian, and Maastrichtian. The longest is the Aptian, lasting about 12 million years; the Santonian is the shortest at just under 3 million years.Section snippets Materials and experiments. Twenty-one lacustrine shale core samples were obtained from the Upper Cretaceous Qingshankou Formation (K 2 qn) of Songliao Basin, NE China. The Songliao Basin is a Mesozoic-Cenozoic basin with an area of about 260,000 km 2 (Fig. 1). The Qingshankou Formation of Songliao Basin consists of lacustrine mudstone and shale up to 550 m thick that ...Upper Cretaceous tyrannosauroid material from North America was primarily known from upper Campanian through Maastrichtian formations until the recent discovery of derived tyrannosaurid taxa from lower-to-mid Campanian deposits in the southwestern United States. However, diagnostic material from contemporaneous deposits further north in Alberta ...First Upper Cretaceous dinosaur track assemblage from Jordan (Middle East) - preliminary results September 2020 Annales Societatis Geologorum Poloniae 90:331 - 342Table of Contents. The Upper Cretaceous deposits of Maryland, by W.B. Clark. The petrography and genesis of the sediments of the Upper Cretaceous of Maryland, by M.I. Goldman. The Upper Cretaceous floras of the world, by E.W. Berry. Correlation of the Upper Cretaceous formations, by W.B. Clark, E.W. Berry, and J.A. Gardner.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.Carcharodontosauridae theropod tooth crowns from the Upper Cretaceous (Bauru Basin) of Brazil: A reassessment of isolated elements and its implications to palaeobiogeography of the group. Palaeogeography, Palaeoclimatology, Palaeoecology, Volume 556, 2020, Article 109870.Aug 1, 2022 · The Upper Cretaceous foraminifera of Kemar-1 in the Bornu Basin are dominated by arenaceous foraminifera, including Ammobaculites, Haplophragmoides, etc (Adegoke, 2012). Large numbers of arenaceous foraminifera were found in Upper Cretaceous outcrop of the Benue Trough, including Glomospirella , Miliammina , Haplophragmoides , Ammoastuta ... 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.A carbonate hardground surface with a bryozoan and vertical borings from the Upper Ordovician of Kentucky.. Carbonate hardgrounds are surfaces of synsedimentarily cemented carbonate layers that have been exposed on the seafloor (Wilson and Palmer, 1992). A hardground is essentially, then, a lithified seafloor. Ancient hardgrounds are found in limestone sequences and distinguished from later ...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 ...Great thicknesses of chalk were deposited during the Late Cretaceous, in water depths of 100 -500 m, when sea levels were higher than at any point in the Phanerozoic (Mortimore et al. 2001) and ...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.depth diagrams delineating the chronology of the Upper Cre- taceous sequences as well as Late Cretaceous sedimentation rates. We use this sequence ...Major, trace and rare earth elements (REE) composition of sandstones from the Upper Cretaceous Sillakkudi Formation, Ariyalur Group, Cauvery Basin were studied to decipher their weathering and provenance history. Texturally, these sandstones are immature, poorly sorted and grain supported. Abundance of feldspars especially, plagioclase indicates rapid deposition of sediments from a nearby ...This paper reports the first discovery of large-bodied dromaeosaurid fossil materials (Dinosauria: Theropoda) from the lower Upper Cretaceous Quantou Formation, in Changchun area, Jilin Province. The specimens include a manual ungual and a pedal penultimate phalanx. The manual ungual is the larger of the two and laterally flattened, curved and sickle-shaped from the middle to the distal end ...Lameta Formation (India) The Lameta Formation, also known as the Infratrappean Beds (not to be confused with the contemporaneous Intertrappean Beds ), is a sedimentary geological formation found in Madhya Pradesh, Gujarat, and Maharashtra, India, associated with the Deccan Traps. It is of Maastrichtian age ( Late Cretaceous ), and is notable ...In this article, we have obtained new paleomagnetic and magnetic anisotropy datasets from the upper Cretaceous to lower Eocene sedimentary rocks in the Cuojiangding area, and combined them with published paleomagnetic data, regional geological reports, biostratigraphic ages and U Pb zircon geochronology to discuss their tectonic implications. 2.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 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 …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]NMMNH locality 3033, Allison Member of the Menefee Formation, Upper Cretaceous (early Campanian), Sandoval County, New Mexico, USA (Figs. 2, 3). The type material of Menefeeceratops sealeyi gen. et sp. nov. is an associated incomplete skeleton of a single individual (NMMNH P-25052) collected over an area of about 13 m 2 (Williamson 1997) (Fig. 3).The deposits corresponding to the Upper Cretaceous Neuquén and San Jorge Gulf basins from northern and central Patagonia have provided two of the most complete sequences of terrestrial vertebrate faunas of all Gondwanan landmasses. Among the carnivorous components, the carcharodontosaurid theropods appeared as common elements during the Early ...Aug 3, 2021 · The scientific paper describing the find—titled "Ancient diversity and turnover of cunninghamioid conifers (Cupressaceae): two new genera from the Upper Cretaceous of Hokkaido, Japan"—has been ... 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 ...10 de set. de 2021 ... Reference: “A Late Cretaceous dinosaur and crocodyliform faunal association–based on isolate teeth and osteoderms–at Cerro Fortaleza Formation ( ...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.@article{osti_6377873, title = {Upper Cretaceous and lower Eocene conglomerates of Western Transverse Ranges: evidence for tectonic rotation}, author = {Reed, W E and Krause, R G.F.}, abstractNote = {Stratigraphic and paleomagnetic studies have suggested that the western Transverse Ranges (WTR) microplate is allochthonous, and may have experienced translational and rotational motions.Sep 1, 2021 · These successions correspond to four distinct tectono-sedimentary phases, from older to younger forming the Upper Paleozoic Karoo Supergroup, the Cretaceous Galula Formation, the Oligocene Nsungwe Formation and the Miocene-Recent Lake Beds strata (Roberts et al., 2012) (Fig. 1). 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.These successions correspond to four distinct tectono-sedimentary phases, from older to younger forming the Upper Paleozoic Karoo Supergroup, the Cretaceous Galula Formation, the Oligocene Nsungwe Formation and the Miocene-Recent Lake Beds strata (Roberts et al., 2012) (Fig. 1).Upper Cretaceous tyrannosauroid material from North America was primarily known from upper Campanian through Maastrichtian formations until the recent discovery of derived tyrannosaurid taxa from lower-to-mid Campanian deposits in the southwestern United States. However, diagnostic material from contemporaneous deposits further north in Alberta ...In order to better constrain the age and provenance of the Upper Cretaceous Wahweap and Kaiparowits formations in southern Utah, U-Pb SHRIMP ages were obtained for detrital zircons from three sandstone samples, in addition to the first 40 Ar-39 Ar age for the Wahweap Formation, obtained from a devitrified volcanic ash horizon (bentonite). The ash horizon, located ∼40 m above the base of the ...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 ...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 ...Upper Cretaceous paleoenvironmental changes and petrophysical responses in lacustrine record (Songliao Basin, NE China) and marine sedimentary deposit (Goban …Ichthyosaur Diversification. Of all reptiles, the ichthyosaurs were the most highly specialised for aquatic life. So fully adapted to a marine existence were they that they never came ashore, but gave birth to ovoviviparous young in the sea. The babies emerged tail first, as do those of whales. (If they were born head first, they would drown.)The basement complex in Egypt, composed of granite, gneiss, schist and metamorphic rocks of Precambrian age, forms a series of rugged hills and is exposed mainly in the extreme southwestern corner of Egypt, Sinai, and along the Red Sea coast. It is covered by Upper Cretaceous to Lower Cenozoic sedimentary rocks to the north (Fig. 1).The Upper Cretaceous succession outcropping in the Anamas-Akseki Autochton, consists of approximately 500 m thick purely platform carbonate sediments.It begins with Cenomanian limestones intercalated with limestone breccias (Unit-1) containing mainly Pseudorhapydionina dubia, Pseudonummoloculina heimi, Spiroloculina cretacea (Assemblage I) and unconformably overlies the Lower Cretaceous ...A carbonate hardground surface with a bryozoan and vertical borings from the Upper Ordovician of Kentucky.. Carbonate hardgrounds are surfaces of synsedimentarily cemented carbonate layers that have been exposed on the seafloor (Wilson and Palmer, 1992). A hardground is essentially, then, a lithified seafloor. Ancient hardgrounds are found in limestone sequences and distinguished from later ...Poropat SF, Mannion PD, Rigby SL, Duncan RJ, Pentland AH, Bevitt JJ, Sloan T, Elliott DA. 2023. A nearly complete skull of the sauropod dinosaur …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. Upper boundary definition: FAD of the Planktonic Foraminifer Rotalipora globotruncanoides: Upper boundary GSSP: Mont Risoux, Hautes-Alpes, France: Upper GSSP ratified: 2002: The Early Cretaceous (geochronological name) or the Lower Cretaceous (chronostratigraphic name) is the earlier or lower of the two major divisions of the ...The Upper Cretaceous Timok Magmatic Complex (TMC) developed on a continental crust composed of different types of Proterozoic to Lower Cretaceous rocks. The TMC consists of the magmatic suites: Timok andesite (АТ) - Turonian-Santonian, Metovnica epiclastite (ЕМ) - Coniacian-Campanian, Osnić basaltic andesite (АО) and Ježevica ...The Late Cretaceous is a key time interval for the understanding of origins and diversification of the crown-group Crocodylia and its extant lineages - Alligatoroidea, Crocodyloidea, and Gavialoidea. Yet, the fossil record of crocodylians in the beginning of the Late Cretaceous is scarce, obscuring the early evolutionary history of the clade.A new genus and species of rove beetle, Afristenus orapensis gen. et sp. nov., is described and figured based on one well-preserved compression fossil from the African, Upper Cretaceous fossil insect deposit, Orapa Diamond Mine in north-east Botswana.Afristenus is definitively placed in the extant subfamily Steninae based on its harpoon-like labial feeding apparatus.The previous oldest known fossil snakes date from ~100 million year old sediments (Upper Cretaceous) and are both morphologically and phylogenetically diverse, indicating that snakes underwent a ...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 ...Upper Cretaceous oceanic red beds in southern Tibet: A major change from anoxic to oxic, deep-sea environments. Cretac Res, 26: 21-32. Article Google Scholar Wang C, Hu X, Huang Y, Wagreich M, Scott R, Hay W. 2011. Cretaceous oceanic red beds as possible consequence of oceanic anoxic events. Sediment Geol, 235: 27-37The Upper Cretaceous coastline in the study area, imme- diately south of the modern Fall Line, reached at least to Colum - bus, Georgia, and possibly farther inland (Fig. 1).Dec 13, 2017 · The Upper Cretaceous-Lower Paleogene succession at Gabal Qreiya area that covers six rock units, Quseir, Duwi, Dakhla, Tarawan, Esna, and Thebes formations, is reviewed through a high-resolution sequence stratigraphic analysis. Six third-order depositional sequences and their associated surfaces and systems tracts are recognized based on stratigraphic, sedimentological, and high-resolution ... The presence of a small to middle-medium sized abelisaurid in the Upper Cretaceous shows that. Author statement. We the authors of "A New Medium-sized Abelisaurid (Theropoda, Dinosauria) from the late Cretaceous (Maastrichtian) Allen Formation of Northern Patagonia, Argentina." declare that have not submitted this article in another journal ...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 ...The Upper Cretaceous-Paleogene strata are developed in the basin, fed predominantly with alluvial and fluvial sediments with lacustrine deposits like siltstones and mudstones that are the major petroleum source rocks in all these basins (Shinn et al., 2010; Xu and Gao, 2015a; Xu et al., 2018).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).In the early Cretaceous, many of the southern continents were still joined together as part of the southern landmass called Gondwana.The Upper Cretaceous Chalk Group of the Anglo-Paris Basin is known to show wedging beds and channel-like features which disrupt the quietly deposited pelagic chalk that covered most of NW Europe ...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. Isopach maps of Upper, Middle, and Lower Cretaceous are contoured at i, Upper Cretaceous units in the Atacama Region represent a drastic pa, The Malatya Basin is situated on the southern Taurus-Anatolian Platform. The southern par, Along-Strike and Down-Dip Variations in Shallow-Marine Se, The Upper Cretaceous deposits in this basin are divided into the Gaogou, Majiacun , The Austin Group (Coniacian-Santonian) is a sequence of, Background Late Cretaceous terrestrial strata of the Neuquén Basin, northern Patagonia, Argentina have yielded, The Upper Cretaceous sedimentary sequence in the James Ross Basin, In this article, we have obtained new paleomagnetic and magne, Background A dinosaur census recorded during the Hell Creek Project (, Maiasaura. Maiasaura (from the Greek μαῖα, meaning "goo, For five years, Chip and Joanna Gaines dominated H, The recently described Dineobellator notohesperus, consisting of, The integument of the theropod dinosaur Carnotaurus sastrei from the, The Cretaceous Period is a classic example of a "green, Field investigation, Microfacies analysis, and biostratigraphy have b, Planktonic foraminifera are one of the most stratigraphic, Upper Cretaceous strata at Göynük, northwestern A.