Upper cretaceous.

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 bone-beds of the Upper Cretaceous Wangshi Group in Zhucheng, Shandong, China are rich in fossil remains of the gigantic hadrosaurid Shantungosaurus. Here we report a new oviraptorosaur ...The Bellezma-Batna Mountains of northeast Algeria mainly consist of Jurassic-Cretaceous platform carbonate deposits (Marmi, 1995 ), forming the eastern part of the …Four pliosaurid fossils from Japanese Upper Cretaceous are described/redescribed. • Two specimens represent large individuals whose skull size …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 ...

Sedimentation effectively terminated in the upper cretaceous (Santonian/Campanian) simultaneous with the earliest development of the Red Sea which bounds the eastern side of the Western Desert basin. The Cretaceous succession in the Komombo basin Concession as shown in Fig. 4 generally consists of six formations from …In 2006, technician Diego Rosales of the Universidad Nacional del Comahue discovered a partial postcranial skeleton of a large theropod in an exposure of the Upper Cretaceous (Santonian) Bajo de la Carpa Formation at a site known as Tratayén in Neuquén Province, northwestern Patagonia, Argentina (Fig. 1 A).The specimen was preliminarily reported in an abstract by Porfiri et al. (2008b).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 ...

The Austin Group (Coniacian-Santonian) is a sequence of interstratified chalk and marl deposited during a sea-level highstand as a transgressive unit. Austin Chalk deposition occurred on a southeastward-dipping carbonate ramp that exhibits distinctive onshore and offshore chalk lithofacies. Discrete intervals within offshore Austin lithofacies ...The Lance (Creek) Formation is a division of Late Cretaceous (dating to about 69 – 66 Ma) rocks in the western United States. Named after Lance Creek, Wyoming, the microvertebrate fossils and dinosaurs represent important components of the latest Mesozoic vertebrate faunas. The Lance Formation is Late Maastrichtian in age ( Lancian land ...

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 ...The Upper Cretaceous-Upper Eocene Belaga Formation is characterized by thick deep-water sediments that were accumulated as one of the biggest ancient submarine fans covering a time interval of 30 Ma. Although the Belaga Formation is the extensively investigated formation in the Rajang Group, its source and tectonic setting are still arguable. ...Abstract. The cranial anatomy of Dinilysia patagonica, a terrestrial snake from the Upper Cretaceous of Argentina, is redescribed and illustrated, ...The 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, extending along the central and eastern Pontides. We present new detrital zircon U-Pb ages, petrography, and paleocurrent measurements from the Campanian-Maastrichtian turbidites and ...Petroleum Engineering Dept, Well planning and implementation. Danish Sector North Sea (Halfdan Field Development - Upper Cretaceous and Danian Chalk).Tasks included: optimizing well path trajectories (Petrel) compared with the field development plan after data review of wells as drilled, the writing of well prognosis, preparation of wellsite geology package, pre-spud and pre-reservoir ...

The Upper Cretaceous, and in particular the Campanian-Maastrichtian, dinosaur fossil record from Egypt is restricted to a handful of discoveries represented by isolated remains of mainly titanosaurian sauropods and abelisaurid theropods (Buffetaut et al., 1990; Rauhut and Werner, 1997; Wiechmann, 1999a, 1999b; Smith and Lamanna, 2006).However, the recently described titanosaurian sauropod ...

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 ...

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).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 ...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. ...Upper Cretaceous biostratigraphy 7 Studia UBB Geologia, 2017, 61 (1-2), 5 - 20 will be achieved in the descendant species. It continues with the onset of the test morphology that occurs in the descendant, but specimens of the descendant that present features of the ancestor also occur and are more frequent in the lower portionThe Cretaceous period has just two very long epochs: Upper Cretaceous 100.5 million years ago (mya) to 65 mya; Lower Cretaceous 145.5 mya to 100.5 mya. The Lower Cretaceous at ~45 million years, is the longest epoch in the Phanerozoic eon. Though famous for its land fauna, the Cretaceous sea level rose much higher than today.

Titanosauriform sauropod dinosaurs were once considered rare in the Upper Cretaceous of Asia, but a number of titanosauriforms from this stratigraphic interval have been discovered in China in recent years. In fact, all adequately known Cretaceous Asian sauropods are titanosauriforms, but only a few have been well studied, lending significance to any new anatomical information that can be ...Upper Cretaceous, Paleocene, Eocene, and Oligocene deposits are characterized by sharp facies and thickness changes as a result of orogenic movements in the Zagros area. Following deposition of ...Apr 21, 2020 · The ichnofossil assemblage from the Upper Cretaceous Kem Kem beds contributes evidence for a transition from predominantly terrestrial to marine deposition. Body fossil and ichnofossil records ... Online. Angel Alejandro Ramírez Velasco, Felisa J. Aguilar, René Hernández-Rivera, José Luis Gudiño Maussán, Marisol Lara Rodríguez, Jesús Alvarado Ortega, Tlatolophus galorum, gen et sp. nov ., a parasaurolophini dinosaur from the upper Campanian of the Cerro del Puebño Formation, Coahuila, norther Mexico, Cretaceous Research, abril de …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).In the Bighorn Basin of north-central Wyoming and south-central Montana, the Frontier Formation of early Late Cretaceous age consists of siliciclastic, bentonitic, and carbonaceous beds that were deposited in marine, brackish-water, and continental environments. Most lithologic units are laterally discontinuous. The Frontier Formation conformably overlies the Mowry Shale and is conformably overlai

The Upper Cretaceous Israeli marine succession was influenced by two major unrelated processes: (1) Tectonic-control of the Syrian Arc fold system that differentiated the outer-shelf into ...The aim of the present paper is to develop a lower Upper Cretaceous standard section for the southern MCB, to provide a detailed integrated correlation on intra- and interbasinal scales, and to discuss the sea-level and facies development. Furthermore, it is intended to calibrate the controversial stratigraphic position of Soest Grünsand ...

Request PDF | On Feb 19, 2020, Nikolay G. Zverkov and others published A gigantic pliosaurid from the Cenomanian (Upper Cretaceous) of the Volga Region, Russia | Find, read and cite all the ...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).Trinity Group stratigraphic column in Texas. The Trinity Group is a group (sequence of rock strata) in the Lower Cretaceous lithostratigraphy of Texas, Arkansas, Mississippi, Louisiana and Oklahoma. It is named for the Trinity River of Texas.. A stratigraphic column at the Mount Bonnell Fault location starts with the Lower Cretaceous Trinity Group overlain by the Edwards Group.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 ...The record of Upper Cretaceous sauropods in Neuquén Basin is the richest from South America. It includes about 32 different species, most of them belonging to titanosaurs (Salgado and Bonaparte, 2007; Novas, 2009). To these, is added here the new genus and species, Menucocelsior arriagadai.Ages of the Upper Cretaceous strata are well established from radiometric dating and from marine layers of the fossiliferous Mancos Group, which is as much as a mile thick in eastern Utah. Farther north, the North Horn …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.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 ... A new megaraptoran theropod dinosaur from the Upper Cretaceous Bajo de la Carpa Formation of northwestern Patagonia. Cret. Res. …Jun 6, 2022 · Occurrences of the Upper Cretaceous sediments in southwestern Slovakia. The numbers refer to the description in the text. (1) Magura nappe system, (2) Jarmuta Fm., Pieniny Klippen Belt, (3) Vienna Basin, (4) Upper Cretaceous atop of Hronic nappe, (5) Chtelnica Fm., Turonian freshwater limestones, (6) Horné Belice Group, (7) Hubina Fm., (8), Horné Belice Group (9) Upper Cretaceous sediments ...

The Cretaceous formations of North Carolina; Part 1, Invertebrate fossils of the Upper Cretaceous formations. North Carolina Geological and Economic Survey , 5 , 604 p. Google Scholar

Judith River near the confluence with the Missouri River. Named by. F.V. Hayden, 1871; [2] F.B. Meek, 1876. [3] The Judith River Formation is a fossil -bearing geologic formation in Montana, and is part of the Judith River Group. It dates to the Late Cretaceous, between 79 and 75.3 million years ago, [4] corresponding to the "Judithian" land ...

The Upper Cretaceous, and in particular the Campanian-Maastrichtian, dinosaur fossil record from Egypt is restricted to a handful of discoveries represented by isolated remains of mainly titanosaurian sauropods and abelisaurid theropods (Buffetaut et al., 1990; Rauhut and Werner, 1997; Wiechmann, 1999a, 1999b; Smith and Lamanna, 2006).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.Here we provide morphological description of new hadrosaurid specimens (vertebrae, femora) and results of the histological analysis of hadrosaurid femora, proximal fragments of a humerus and a scapula from the Upper Cretaceous high-latitude (palaeolatitude estimate of 75°N) Kakanaut locality (Chukotka, Russia).Leptoconops ellenbergeri Szadziewski sp. nov., a new blood sucking biting midge from Upper Cretaceous Burmese amber is described and illustrated. A key for the determination of 18 named fossil species of Leptoconops reported from Lower and Upper Cretaceous and Eocene ambers is provided. Fossil records show that Leptoconops is an old relictual pantropical genus that was distributed worldwide in ...The Cretaceous period is the third and last geological period from the Mesozoic Era. It's divided as: Upper Cretaceous and Lower Cretaceous. It started after the Jurassic Period and lasted 79 million of years, during which 70% of the existing species and practically all dinosaurs were extinguished.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 ).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-The Cretaceous Continental Scientific Drilling borehole in the Jiaolai Basin (CCSD-LK-I) provides rare samples from the Upper Cretaceous and Paleocene terrestrial strata. This study aims to establish a chronostratigraphical framework for the terrestrial strata of the Jiaolai Basin by integrating magnetostratigraphy and isotope geochronology. 2.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 ...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 …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.A prior study involved 78 Collembola specimens preserved in Upper Cretaceous (Campanian) amber from Canada. This work deals with 109 specimens from the mid Cretaceous (Cenomanian or possibly slightly lower) of Myanmar, 37 of which have been identified to the generic level; 14 new species are described.

Lithology and Depositional Environment: The Upper Cretaceous Naparima Hill Formation is a sequence of well-bedded, sometimes bituminous mudstones and shales, with some marls and bituminous lime. The upper part of this formation is made of silicified siltstone/claystone referred to colloquially as "argiline" or "argillite." Cherts are abundant ...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 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.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 ...Instagram:https://instagram. long beach state baseball schedulematthew jacobsonnitrogen 15where do i submit pslf form 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 ...Abstract. The geological and paleoenvironmental setting and the vertebrate taxonomy of the fossiliferous, Cenomanian-age deltaic sediments in eastern Morocco, generally referred to as the “Kem ... roblox character baddierhizophagus intraradices The Cretaceous is defined as the period between 145.5 and 65.5 million years ago,* the last period of the Mesozoic Era, following the Jurassic and ending with the extinction of the dinosaurs (except birds). By the beginning of the Cretaceous, the supercontinent Pangea was already rifting apart, and by the mid-Cretaceous, it had split into ... k jd The Upper Cretaceous deposits exposed at Petrești (Figs. 1:11, 2), in an artificial outcrop stretching along the Sebeș River that was created slightly more than a decade ago (Codrea et al., 2010; Vremir, 2010; Csiki-Sava et al., 2012), were formed during, and tellingly illustrate, the main depositional events of the Upper Cretaceous megasequence.Echinodermata are rare in the Palaeozoic and Mesozoic of New Zealand. A carpoid is known from the Devonian, a cidarid (Echinoidea) from the Upper Triassic, an ophiuroid from the Upper Cretaceous, and asteroids from the Upper Jurassic and Upper Cretaceous. Good echinoid faunas are known from the Tertiary.