Upper cretaceous
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. ...Jun 1, 2021 · 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.
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Upper Cretaceous rocks form a virtually continuous blanket over the Gulf of Mexico basin. Overall, the inner edge of the northern outcrop parallels the deeply buried Paleozoic Ouachita orogenic belt. Conspicuous projecting features, such as the Rio Grande and Mississippi embayments, are situated on pronounced salients of the older Ouachita ...The Naparima Hill Formation is an organic rich, oil-prone sedimentary sequence located in the upper section of the Cretaceous source rock of Trinidad (Rodrigues, 1988) (Fig. 2a).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 ...A new Cretaceous ootaxon (eggshell type) from the Kaiparowits Formation of Grand Staircase-Escalante National Monument is among a growing number of very small eggs described from the Mesozoic.Our porosity evaluation focuses on the Upper Cretaceous and Tertiary interval that overlies the Eagle Ford Formation in South Texas (Fig. 1).This 3-4 km thick, shale-dominated section was a passive margin during deposition and, other than some localized normal faulting, there is little structural deformation and no significant unconformities (i.e., gaps in geologic time) in the interval of ...Rare remains of tyrannosauroid dinosaurs from the Aguja Formation in West Texas indicate the presence here of a relatively gracile species, comparable in form and adult size to Appalachiosaurus or subadult albertosaurines, Gorgosaurus and Albertosaurus.Histologic analysis of one of the specimens indicates that the Aguja tyrannosaur attained an adult size substantially smaller than adult ...10 de fev. de 2023 ... Upper Cretaceous–Paleocene Magnetostratigraphy of the Longmenshan Foreland Basin and Its Implications for the Tectonic Deformation of the ...Jun 1, 2022 · The only turtle closest to this size from the Upper Cretaceous of China is Nanhsiungchelys wuchingensis of Nanhsiungchelyidae, in which the carapace length is larger than 111 cm. However, this large turtle was recovered from Nanxiong County, Guangdong Province (Ye, 1966; Tong and Li, 2019). Sand is a normal marine Upper Cretaceous sand-facies assem blage typical of the level-bottom shelf area. It is character ized by its variety of gastropods and numerous burrowing pelecypods. In contrast the fauna of the upper part of the Coffee Sand is dominated by surface-dwelling and attached... Upper Cretaceous (Senonian) formations. Figure 1 Facies map and schematic paleogeographic reconstruction of the Moroccan Atlas region during the Late ...Large carnivorous dinosaurs, are common in the Late Cretaceous of Asia, but only some fragment teeth have been recovered from southern China. In a paper published in the latest issue of Vertebrata ...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 ...Jun 1, 2022 · The only turtle closest to this size from the Upper Cretaceous of China is Nanhsiungchelys wuchingensis of Nanhsiungchelyidae, in which the carapace length is larger than 111 cm. However, this large turtle was recovered from Nanxiong County, Guangdong Province (Ye, 1966; Tong and Li, 2019). Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco - PMC. ), in addition, has a broad circum-Mediterranean distribution seemingly restricted to Cenomanian strata. As the fauna from both lower and upper units appears similar, inferred a Cenomanian age for these sediments, which has generally been accepted ...Paleoenvironmental changes recorded in the Santa Marta Formation (Santonian—Campanian, Upper Cretaceous), James Ross Island, Antarctica, inferred from palynofacies analyses. Gustavo Santiago, Marcelo de Araujo Carvalho, Renato Rodriguez Cabral Ramos, Sandro Marcelo Scheffler. In Press, Journal Pre-proof, Available online 28 September 2023.
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.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 ScholarThe 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 ...A new genus and species of an elasmosaurid plesiosaur, Futabasaurus suzukii, is described based on a partial skeleton from the Inoceramus amakusensis Zone (Lower Santonian, Upper Cretaceous) of ...A similar reduction trend can also be traced among the fossil pollen organs. Modern type pollen organs occur in the Upper Cretaceous (Maastrichtian or Campanian) of Canada (Serbet, 1996, Rothwell and Holt, 1997; Crane, pers. comm.), while Ginkgo liaoningensis (Liu et al., 2006) of the Lower Cretaceous bears more than two pollen sacs.
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.Clay-rich deposits of Upper Cretaceous levels in the Taveiro (Reveles and S. Pedro) and Aveiro (Bustos) regions of west-central Portugal are economically and environmentally important, but detailed chemical and mineralogical characterization is lacking. The purpose of this study was to partially fill that gap by correlating the trace-element geochemistry (particularly the rare earth elements ...Chapter 6 Evolution of the Upper Cretaceous Oysters: Traditional Morphometrics Approach Ahmed A. Abdelhady and Ashraf M.T. Elewa Idea and Aims The faunal association, which is revealed by newly discovered, well preserved, and therefore highly diverse assemblages, enabled us to recognize some phyloge- netic trends in the Upper Cretaceous oysters.…
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Prior to the discovery of Pyroraptor, only indeterminate Late Cretaceous dromaeosaurid material had been known in Europe (Allain and Taquet, 2000) from elsewhere in France (Buffetaut et al., 1986 ...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 ...
Winton Formation. / -22.3; 143.1. / -51.8; 134.1. The Winton Formation is a Cretaceous geological formation in central-western Queensland, Australia. It is late Albian to early Turonian in age. [2] The formation blankets large areas of central-western Queensland. It consists of sedimentary rocks such as sandstone, siltstone and claystone.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 …
The Yezo Group is composed of mainly Upper Cre The Hell Creek Formation is an intensively studied geological formation of mostly Upper Cretaceous and some Early Paleocene rocks in North America, named for exposures studied along Hell Creek, near Jordan, Montana. The formation stretches over portions of Montana, North Dakota, South Dakota, and Wyoming. In Montana, the Hell Creek Formation ... Localised magmatism is reported from northern Sumatra and the Ranong and Khlong Marui faults in southern Thailand were active during the Late Cretaceous and Paleocene, parallel to this orientation, suggesting deformation in the upper plate above the subducted transform. Download : Download full-size image; Fig. 24. Reconstruction at 65 Ma ... Japanese Upper Cretaceous marine reptile fossils occThe Cenomanian is, in the ICS ' geological timescale, the 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 ... Chapter 6 Evolution of the Upper Cretaceous Oysters: Traditional Morphometrics Approach Ahmed A. Abdelhady and Ashraf M.T. Elewa Idea and Aims The faunal association, which is revealed by newly discovered, well preserved, and therefore highly diverse assemblages, enabled us to recognize some phyloge- netic trends in the Upper Cretaceous oysters. Parksosaurus (meaning "William Parks's lizard& A palynological and organic geochemical study of the Upper Cretaceous deposits cropping out in the southwestern part of the Transylvanian Basin (Petreşti section) has been carried out. The samples were collected from the marine Bozeş as well as from the overlying continental Sebeş formations, with main focus on the Bozeș Formation. The Hell Creek Formation is an intensively studied geological formatThe specimen comes from the upper part oUpper GSSP ratified. 2002 [3] The Albian is both an age of The Upper Cretaceous (Campanian-Maastrichtian) turbidites of the central Pontides were deposited in a forearc setting following the oceanic opening of the Black Sea basin. In this study, we report new U–Pb detrital zircon ages, petrographic data, and paleocurrent measurements from the Upper Cretaceous (Campanian-Maastrichtian) turbidites. Fossil sites of Late Late Cretaceous period – 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.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. From a study of silicified fossils, and in particul[Ichthyosaurs from the Upper Triassic (CarniaThe mid-to Upper Cretaceous forearc basin dep To define the precise structuration that controls the Upper Cretaceous Formation (AR/C) in the SWS oil field, many seismic sections were interpreted showing extensional faults with upward splays formed by synthetic and antithetic normal faults (Fig. 20, Fig. 21). The extensional nature of the faults shown in (Fig. 20, Fig. 21) is evident from ...