Upper cretaceous

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 …

This research focuses on Upper Cretaceous geological units using legacy industry 2-D seismic reflection and well data. It provides an integrated description and ...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 ...Here we report on, and briefly describe, two new sauropod dinosaur specimens from the Cenomanian-lower Turonian (lower Upper Cretaceous) Winton Formation of Queensland, northeast Australia (Figs ...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.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 ... PDF | On Aug 1, 2020, Derek T. Lichtner and others published Upper Cretaceous Strata in the Powder River Basin: Formation Tops Database, Structure and Thickness Contour Maps, and Associated Well ...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.

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.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.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 ... Upper Cretaceous (lower-middle Turonian—middle Campanian), Xiaguan Formation, Neixiang County, Henan Province, China. Diagnosis. Small basal neoceratopsian with the following autapomorphies ...The Bohemian Cretaceous Basin was an intra-continental basin formed during the Cenomanian-Santonian (100.5-83.6 Ma) as a seaway between the Boreal Sea and Alpine Ocean (Fig. 1).The basin originated by the reactivation of a fault system in the Variscan basement of the Bohemian Massif, and combined features of an epeiric sea formed during global transgression with those of a tectonically ...

Feb 9, 2011 · Background A dinosaur census recorded during the Hell Creek Project (1999–2009) incorporates multiple lines of evidence from geography, taphohistory, stratigraphy, phylogeny and ontogeny to investigate the relative abundance of large dinosaurs preserved in the Upper Cretaceous Hell Creek Formation of northeastern Montana, USA. Overall, the dinosaur skeletal assemblages in the Hell Creek ... The Upper Cretaceous sediments of New Jersey and Delaware represent the proximal part of an eastward-thickening clastic sequence that attains its maximum thickness in the Baltimore Canyon Trough under the continental shelf. The sediments are composed of interfingering continental, coastal, and neritic facies deposited during repeated trans-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 ...Furcatoceratops (meaning "forked horned face") is a genus of centrosaurine ceratopsid dinosaur from the Late Cretaceous Judith River Formation of Montana. The type species is Furcatoceratops elucidans. Discovery and naming NSM PV 24660, which is the holotype specimen ... NSM PV 24660 was collected from rocks of the upper Coal Ridge Member ...

Ross clearance event 2023.

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 ScholarA recently discovered articulated partial skeleton of Ornithomimus from the Upper Cretaceous Dinosaur Park Formation of Alberta, Canada is remarkable in the extent and quality of preservation of integumentary structures including feathers. It is the first ornithomimid to preserve a tail bearing extensive plumaceous feathers that are slightly more elongate in comparison to those present on the ...The Upper Cretaceous (Turonian) Akrabou Formation at Asfla in south east Morocco is a marine carbonate succession well-known for its exceptionally preserved, often three-dimensional marine vertebrate fossils.It is perhaps best known for its diverse ichthyological assemblage comprising both cartilaginous and bony fishes, notably …The Dinosaur Park Formation is the uppermost member of the Belly River Group (also known as the Judith River Group), a major geologic unit in southern Alberta.It was deposited during the Campanian stage of the Late Cretaceous, between about 76.5 and 74.4 million years ago. It was deposited in alluvial and coastal plain environments, and it is bounded …

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 ... 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 ...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’.The Upper Cretaceous Qingshankou (K 2 n) and Nenjiang (K 2 q) shale oil from the Changling Sag (CLS) of the Southern Songliao Basin located in NE China was studied to determine shale reservoir properties and evaluate oil potential. Multiple methods, including optical microscope, scanning electron microscope and energy dispersive spectrum analysis (SEM-EDS), nitrogen adsorption/desorption ...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.Currently, the South American peirosaurids include nine taxa all the species found in Bauru Group. Pepesuchus deiseae Campos et al., 2011 was found in the meandering fluvial deposits from Presidente Prudente Formation, Upper Cretaceous (Campanian-Maastrichtian) near Pirapozinho and Presidente Prudente cities, São Paulo state, Brazil (Fernandes and Ribeiro, 2015).The Upper Cretaceous is the last geological epoch in the Cretaceous. It began 100.5 million years ago, and ended 66 million years ago. The Cretaceous is traditionally divided into Lower Cretaceous (early), and Upper Cretaceous (late), because of the different rocks .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 ...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 …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.Lambeosaurines have been traditionally split into the tribes or clades Parasaurolophini ( Parasaurolophus, Charonosaurus, others (?).) and Lambeosaurini ( Corythosaurus, Hypacrosaurus, Lambeosaurus, others.). [2] Corythosaurini (synonym of Lambeosaurini, see below) and Parasaurolophini as terms entered the formal literature in Evans and Reisz's ...

Mantelliceras, with strong, alternately long and short ribs, and tubercles which may be lateral, umbilical, ventrolateral, but never siphonal, is an early member of the super-family Acanthocerataceae which dominate the normally coiled Upper Cretaceous taxa. Early Cenomanian sands with this fauna are exposed in Dorset and Devon.

Upper Cretaceous (Maastrichtian and Campanian) hydrocarbon source rocks from the Latrobe Group, Gippsland Basin (Australia) have been analysed using gas chromatography-mass spectrometry (GC-MS) in order to understand their geochemical characteristics and to reconstruct palaeovegetation and palaeoclimate changes.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 …Ammonites are the most important macrofossils for biostratigraphy in the Cretaceous period (e.g., Kennedy and Cobban 1977; Kennedy 1986). This is due to the world-wide distribution of many species and a fast dispersal of hatchlings that is the main factor controlling distribution (e.g., Scheltema 1977; De Baets et al. 2015b), associated with high evolutionary rates (Kennedy 1977, Ward and ...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 ...Home · Scientific Publications · American Museum Novitates · Some Upper Cretaceous ammonites from Angola. American Museum novitates ; no. 1182 ...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 …Oct 2, 2012 · 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 ... Figure 2. Blufftown Formation In eastern Alabama, the bottom layers of the Upper Cretaceous sequence are composed mainly of river sediments and take the form of a combination of river and coastal deposits in western and west-central areas of Alabama; these oldest deposits are called the Tuscaloosa Formation. Younger detrital strata are found mainly in eastern and east-central Alabama (Figure 2 ...The Kem Kem beds in South Eastern Morocco contain a rich early Upper (or possibly late Lower) Cretaceous vertebrate assemblage. Fragmentary remains, predominantly teeth and jaw tips, represent several kinds of pterosaur although only one species, the ornithocheirid Coloborhynchus moroccensis, has been named.Here, we describe a new azhdarchid pterosaur, Alanqa saharica nov. gen. nov. sp., based ...

Asset protection salary walmart.

Natural history masters.

The Cenomanian Mishrif Formation is the main Upper Cretaceous carbonate reservoir in southern Iraq. For decades it has produced large quantities of oil from the major structures, such as Zubair, Rumaila and West Qurna. The main reservoir units in the formation are represented by bioclastic and peloidal limestones with intergranular and ...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 …Upper Cretaceous pelagic red carbonates which consist of limestone and muddy limestone within the Eastern Pontides, NE Turkey (Fig. 1). There, the red beds have a great lateral extent with remarkable lithology and thickness of up to 45 m, and are characterized by abun-This study reports on a new ceratopsid, Spiclypeus shipporum gen et sp. nov., from the lower Coal Ridge Member of the Judith River Formation in Montana, USA, which dates to ~76 Ma (upper Campanian). The species is distinguished by rugose dorsal contacts on the premaxillae for the nasals, laterally projecting postorbital horncores, fully fused and anteriorly curled P1 and P2 epiparietals, and a ...21 de abr. de 2020 ... The age of the “Kem Kem beds” has been regarded variously as mid or early Late Cretaceous (Albian-Cenomanian). Lavocat (1948) described the most ...Apr 15, 2014 · The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous period is divided in the geologic timescale. Rock strata from this epoch form the Upper Cretaceous series. The Cretaceous is named after the white limestone known as chalk which occurs widely in northern France and is famously seen in the white cliffs of ... from the Upper Cretaceous of southern China (Dong, 1979; Lü et al., 2009a). However, these isolated teeth were not described in detail for comparison with the Jiangxi specimen. RecentlyThe Upper Cretaceous sedimentary sequence in the James Ross Basin area includes the Santonian?-Maastrichtian Marambio Group, which consists of marine clastic sediments with a diverse and abundant mega fossil fauna and flora (Crame et al., 1999, 2004).Upper Cretaceous rocks reach a thickness of 2400m in the southern Ajdabiya Trough compared with 600m on the adjacent platforms. Because of its depth little is known about the northern part of the trough. The Ajdabiya Trough covers an area of 22,500km 2 and extends from the coast at Al Brayqah to the Kalanshiyu High in the south. South of the ...Request 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 ...When it comes to the Northwest of Argentina, most of the records come from the Cretaceous rocks of Salta Province, which yielded ceratosaurian abelisauroids like Noasaurus and Guemesia. Preliminary studies of the Los Llanos Formation at Eastern La Rioja Province recognized bone remains of Upper Cretaceous undetermined Abelisauridae and ... ….

21 de abr. de 2020 ... The Kem Kem vertebrate assemblage, currently the best documented association just prior to the onset of the Cenomanian-Turonian marine ...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 ... Dec 6, 2022 · The Upper Cretaceous to Paleogene sequences in the Middle East are characterized by regional anoxic black shale occurrences, enriched in different stratigraphic levels of various local basins (Abed et al., 2005; Almogi-Labin et al. 1990a, 1993; Ashckenazi-Polivoda et al., 2010, 2011; Holbourn et al., 1999; Inan et al., 2010). The studied black ... Rudist bivalve, Maurens Formation, Upper Cretaceous, southwestern France. Rudists are a group of extinct box-, tube- or ring-shaped marine heterodont bivalves belonging to the order Hippuritida that arose during the Late Jurassic and became so diverse during the Cretaceous that they were major reef-building organisms in the Tethys Ocean, until their …The mid-Cretaceous is often regarded as the warmest period in Earth's history, reaching the Cretaceous Thermal Maximum in the Turonian (89.8-93.9 million years ago; Wilson et al., 2002), although increasingly evidence suggests a much more complex picture with cool events throughout the mid to Late Cretaceous (Veizer et al., 2000, Weissert and ...The Cenomanian Mishrif Formation is the main Upper Cretaceous carbonate reservoir in southern Iraq. For decades it has produced large quantities of oil from the major structures, such as Zubair, Rumaila and West Qurna. The main reservoir units in the formation are represented by bioclastic and peloidal limestones with intergranular and ...To further constrain the India-Asia collisional process, a combined paleomagnetic and geochronologic study has been carried out on the Upper Cretaceous Jingzhushan Formation redbeds and the Lower ...Cretaceous: 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 ...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 … Upper cretaceous, [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1]