Upper cretaceous.

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 ...Upper Cretaceous leaf flora from the Blaszyk Moraine (Zamek Formation), King George Island, South Shetland Islands, West Antarctica. Acta Palaeobotanica, 34 (1994), pp. 119-163. Google Scholar. 151. Zhiyan Zhou, Haomin Li. Some Late Cretaceous plants from King George Island, Antarctica.Late Cretaceous palaeogeography of western North America was dominated by three tectonic belts that extended virtually the length of the Cordillera: (1) an Andean-type volcanic–plutonic magmatic arc on the west (i.e., Cordilleran Magmatic Arc), (2) a thin-skinned fold-and-thrust belt on the east (initiated in mid-Cretaceous time), and (3) a hinterland (zone of metamorphism, magmatism, and ...We sample and process Upper Cretaceous rocks as a hobby out of fun. We extract the forams, photograph and identify them based on a comprehensive set of ...To date, the most complete and largely articulated specimen is the holotype of Sachicasaurus vitae Páramo-Fonseca et al., (2018) from the upper Barremian (Lower Cretaceous) of Colombia. It is 990 cm long measured from the tip of the snout to the posterior end of the last preserved caudal vertebra (Páramo-Fonseca et al., 2018).

Foraminifera are found in all marine environments, they may be planktic or benthic in mode of life. The generally accepted classification of the foraminifera is based on that of Loeblich and Tappan (1964). The Order Foraminiferida (informally foraminifera) belongs to the Kingdom Protista, Subkingdom Protozoa, Phylum Sarcomastigophora, Subphylum ...Cretaceous age on the basis of Buchia crassicollis (Keyserling). Subsequent work by Martin and Katz (1912) established the presence within this series of Lower Jurassic, Lower Cretaceous, Upper Cretaceous, and Tertiary rocks. In 1926 Martin restricted and redefined the term "Matanuska Series" and desig­

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.Robert G. Loucks, Toti E. Larson, Charlie Y. C. Zheng, Christopher K. Zahm, Lucy T. Ko, James E. Sivil, Peng Sheng, Stephen C. Ruppel, William A. Ambrose; Geologic characterization of the type cored section for the Upper Cretaceous Austin Chalk Group in southern Texas: A combination fractured and unconventional reservoir.

The Upper Cretaceous Qingshankou Formation in the Songliao Basin, NE China is known to contain excellent petroleum source rocks. In addition, it serves as a valuable record to study depositional conditions within the water column and climatic change.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 ...ODP Leg 132, with some Upper Cretaceous sediment recovered at Sites 47, 48, 305, 577, and 810. The Cretaceous sections recovered at all sites during Leg 198 were characterized by pure nannofossil ooze in the Campanian and Maastrichtian and chert with nannofossil ooze and porcellanite in the older Cretaceous sections. The presence of ubiqui-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 ...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 ...

10 de fev. de 2023 ... Upper Cretaceous–Paleocene Magnetostratigraphy of the Longmenshan Foreland Basin and Its Implications for the Tectonic Deformation of 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 ...

The Yogou Formation of the Upper Cretaceous is a potential source rock in the Termit Basin of Niger, and the TOC content of the upper member is 1.8-9 times that of the lower member. However, the influence of the sedimentary environment evolution on its organic matter heterogeneity is still unclear. In this paper, the evolution of the sedimentary environment of the Yogou Formation profile was ...Foraminifera are found in all marine environments, they may be planktic or benthic in mode of life. The generally accepted classification of the foraminifera is based on that of Loeblich and Tappan (1964). The Order Foraminiferida (informally foraminifera) belongs to the Kingdom Protista, Subkingdom Protozoa, Phylum Sarcomastigophora, Subphylum ...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 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 ...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 ).The Upper Jurassic succession contains the Baicheng Fm. The Huoshiling, Shahezi, Yingcheng, Denglouku, and Quantou Fms compose the Lower Cretaceous section; and Upper Cretaceous strata include the Qingshankou (K 2 qn), Yaojia, Nenjiang (K 2 n), Sifangtai, and Mingshui Fms (Gao and Cai, 1997).. The sediments of K 2 qn and K 2 n were deposited in a semideep lake during global sea level rise (Liu ...A complete Cretaceous-Paleogene stratigraphy is developed within the Longmenshan foreland basin, ... Solid/open symbols are lower/upper hemisphere projections. There are several differences in the thermal demagnetization characteristics of the samples with different lithologies and colors. For the purplish-red and brownish-red sandstones ...

Sequence analysis of the upper Cretaceous Two Medicine and Judith River formations, Montana: nonmarine response to the Claggett and Bearpaw marine cycles. Journal of Sedimentary Research 68 : 615 - 631 .Palaeoenvironment of the Upper Cretaceous (Cenomanian–Turonian) portion of the Winton Formation, Queensland, Australia. Peer J. e5513. Syme, C.E. and Salisbury, S.W. 2018. Taphonomy of Isisfordia duncani specimens from the Lower Cretaceous (upper Albian) portion of the Winton Formation, Isisford, central-west Queensland.Meniscoessus robustus – Named by Othniel Charles Marsh in 1889. Remains were discovered in Maastrichtian (Upper Cretaceous) and possibly Paleocene strata of Wyoming, Montana, and South Dakota, USA, and the St. Mary's River Formation of Canada. The weight of this species is estimated to have been about 3.3 kilograms (7.3 lb).Apr 1, 2023 · The Upper Cretaceous Qingshankou Formation in the Songliao Basin, NE China is known to contain excellent petroleum source rocks. In addition, it serves as a valuable record to study depositional conditions within the water column and climatic change. The Upper Cretaceous Austin Chalk was deposited on the drowned Lower Cretaceous Comanche Shelf during the Coniacian through the lower Campanian Stages (Phelps et al., 2013) (Fig. 1). During this time, water depths on the drowned shelf in the area of the productive Austin Chalk trend have been estimated to be below storm wave base, or greater ...

To date, the most complete and largely articulated specimen is the holotype of Sachicasaurus vitae Páramo-Fonseca et al., (2018) from the upper Barremian (Lower Cretaceous) of Colombia. It is 990 cm long measured from the tip of the snout to the posterior end of the last preserved caudal vertebra (Páramo-Fonseca et al., 2018).

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 ...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 ...The Kem Kem Group (commonly known as the Kem Kem beds) 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 Gara Sbaa Formation …Despite this, species of carcharodontosaurians have been recovered from two lower Upper Cretaceous formations (Cenomanian and Turonian) of Asiamerica and include large taxa [5,6]. As the apex predators in these early Late Cretaceous ecosystems, their faunal associations with other predators, particularly tyrannosauroids, are poorly known.Aerotitan sudamericanus, from the Upper Cretaceous of the Neuquén Basin (Patagonia, Argentina), is known from a partial jaw fragment which has been interpreted as either an azhdarchid upper jaw, azhdarchid lower jaw, or thalassodromine upper jaw (as the sister-group of Alanqa). Here, we compare it in detail to upper and lower jaws of taxa ...Additional publication details. Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader. PDF documents opened from your browser may not display or print as intended.The Pierre Shale is a geologic formation or series in the Upper Cretaceous which occurs east of the Rocky Mountains in the Great Plains, from Pembina Valley in Canada [2] to New Mexico . The Pierre Shale was described by Meek and Hayden in 1862 in the Proceedings of the Academy of Sciences (Philadelphia). They described it as a dark-gray shale ...A new articulated postcranial specimen of an indeterminate ankylosaurid dinosaur from the Upper Cretaceous (middle-upper Campanian) Baruungoyot Formation from Hermiin Tsav, southern Gobi Desert ...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 record of Upper Cretaceous dinosaurs in China is dominated by skeletal body fossils, while the dinosaur track record has remained sparse. The new discovery of dinosaur tracks from the Shaxian Formation in Longxiang Village, Fujian Province, is the largest Upper Cretaceous ichnofauna known from China and the first recorded "evidence of" dinosaurs in Fujian Province.

Download scientific diagram | A, Geographical and geological situation of Upper Cretaceous outcrops in the Southern Pyrenees and distribution of the ...

Abstract The Upper Cretaceous to Lower Tertiary sediments in the Indus-Yarlung suture zone provide critical records on the history of accretion along the southern margin of Asia prior to, and during, the India-Asia collision. In this article, we report field and petrographic observations, in situ detrital zircon U-Pb ages, Lu-Hf isotopic analyses, and Cr-spinel electron microprobe data from ...

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 ...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.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 …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 ...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).Along-Strike and Down-Dip Variations in Shallow-Marine Sequence Stratigraphic Architecture: Upper Cretaceous Star Point Sandstone, Wasatch Plateau, Central Utah, U.S.A. Publication Journal of Sedimentary ResearchTheropod and other dinosaurian tracks from the upper Lower Cretaceous of northeastern China: overlooked Fuxin Biota records reinvestigated. , Cretaceous Research, 135 105190, 1-9Section 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 ...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.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 ... Deep-marine sedimentation occurred from the late Triassic to mid-Cretaceous (Aptian). Further to the west, near Xialu, Matsuoka et al. (2002) also sampled cherts from the Bainang terrane. They reported Middle Jurassic (Aalenian)–Lower Cretaceous (Aptian) assemblages extracted from cherts and siliceous mudstones. 3.6. Yamdrok MélangeAbstract The Upper Cretaceous to Lower Tertiary sediments in the Indus-Yarlung suture zone provide critical records on the history of accretion along the southern margin of Asia prior to, and during, the India-Asia collision. In this article, we report field and petrographic observations, in situ detrital zircon U-Pb ages, Lu-Hf isotopic analyses, and Cr-spinel electron microprobe data from ...

The study area consists of sediment packages deposited within the Upper Cretaceous sequence of the Anambra Basin, in the south-eastern part of Nigeria (Fig. 1). The Anambra Basin is situated at the western flank of the Southern Benue Trough, bounded to the west by the Precambrian Basement Complex rocks of western Nigeria, to the east by the ...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. 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 …Instagram:https://instagram. ms ed vs m edmenards furnace pressure switchtexas and kansas football gamecraigslist greene county ny IN THIS PAPER the discovery in Japan of smaller Foraminifera from the Upper Cretaceous strata is recorded for the firsi: time. This contribution, in addition to ...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 ... withholding tax exemptyeah you are gif 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 ...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 peak abundances and diversity. derrick perry 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 ...A nearly complete skull of a new ceratopsid dinosaur, Bisticeratops froeseorum, is described from the Farmington Member of the Kirtland Formation (late Campanian, Upper Cretaceous) of New Mexico.