Upper cretaceous.

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 ...The earliest fruit fossil convincingly assigned to Ceratophyllum was reported from the Upper Cretaceous of Mexico, namely C. lesii Estrada-Ruiz, Calvillo-Canadell et Cevallos-Ferrizis [6 ...This study examined both vertical and lateral facies changes as well as petrographic characteristics of the outcropping section of the Upper Cretaceous Shendi Formation in the Musawwarat-Naga area ...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.

Figure 2.6 Regional thickness maps [isochore, in feet]: for [A] entire Upper Cretaceous section, [B] Maastrichtian to Turonian, and [C] Turonian to base of Upper Cretaceous ..31 Figure 2.7 Structure maps, in feet, for [A] top of Upper Cretaceous [Late Maastrichtian],

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 ...The Cretaceous Maha Sarakham Formation in this area consists of evaporite units (Lower Salt and Middle/Upper Salt) interbedded with clastic sediment. Potash minerals in the upper part of the Lower Salt Unit are associated with an underlying thick bed of rock salt. The δ 11 B values of halite (21.46 ‰–32.62‰) indicated a marine origin ...

Upper Cretaceous Stratigraphy and Depositional Environments of Western Kansas by Donald E. Hattin, Indiana University, and Charles T. Siemers, Cities Service Company Assisted by Gary F. Stewart, Oklahoma State University. Originally published in 1978 as Kansas Geological Survey Guidebook 3. The book was reprinted in 1987 with some modifications.A 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 ...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 attachedThe Cretaceous Period is considered the archetypical greenhouse interval, yet there is mounting evidence for intermittent cooler climatic phases throughout this geologic span. Few continental climate histories exist for the Cretaceous south of the paleoequator, and fewer still for Africa during this time. The Cretaceous Galula Formation is one of the few exposed fossiliferous continental ...

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 ...

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.

ABSTRACT. Abelisaurids are among the most abundant and diverse Patagonian Late Cretaceous theropods. Here, we present a new furileusaurian abelisaurid, Llukalkan aliocranianus gen. et sp. nov., represented by cranial remains from the Bajo de la Carpa Formation (Santonian) at La Invernada fossil area, northwestern Patagonia. Features characterizing this taxon include a possible caudal tympanic ...The Upper Cretaceous (Maastrichtian) Lameta Formation is well-known for its osteological and oological remains of sauropods from the eastern and western parts of the Narmada Valley, central India. The newly documented ninety-two titanosaur clutches from Dhar District (Madhya Pradesh State, central India) add further to this extensive …Cretaceous Period - Climate, Extinction, Dinosaurs: In general, the climate of the Cretaceous Period was much warmer than at present, perhaps the warmest on a worldwide basis than at any other time during the Phanerozoic Eon. The climate was also more equable in that the temperature difference between the poles and the Equator was about …The Cretaceous period was the last and longest segment of the Mesozoic era. It lasted approximately 79 million years, from the minor extinction event that closed …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 ... 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.

Small abelisaurids are also known from the Upper Cretaceous of Europe, including Tarascosaurus from the Campanian of France (Le Loeuff and Buffetaut, 1991), Betasuchus from the Maastrichtian of the Netherlands (Seeley, 1883; Le Loeuff and Buffetaut, 1991; Tortosa et al., 2014), and an unnamed species from the lower Maastrichtian of France ...Enantiornithes were the dominant avialan clade in the Mesozoic. However, their record for the Upper Cretaceous is scarce. In this study, we present and describe Yatenavis ieujensis gen. et sp. nov., one of the youngest occurrence of an enantiornithine bird. The specimen, the distal half of a right humerus, was found in Chorrillo Formation ...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.Only two Cretaceous source rocks exist in the NRB, the Upper Cretaceous Donga and the Upper Cretaceous Yogou source rocks. The source rock of the Yogou Formation is the most prolific in the entire NRB and has basin-wide distribution (Zhou et al., 2017; Xiao et al., 2019).Thanks to the Internet, it’s easier than ever to watch your favorite shows. Fortunately, all you need is an Internet connection, and you can watch on your computer, handheld device or through an Internet connection on your TV. Use the follo...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 ...The specimen under study was collected during field seasons of 1998 as part of a paleontological survey of the upper Cretaceous sedimentary units of the Antarctic Peninsula. It was found partially articulated by Allen J. Kihm, of Minot State University, and is permanently housed in the South Dakota School of Mines and Technology (SDSM 78147 ...

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 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.

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 ...In this work, an assemblage of fossil woods briefly mentioned by Alvarez et al. (2019, 2020) from the Bajo Barreal Formation (Upper Cretaceous of the Golfo San Jorge Basin, in central Patagonia, Argentina) is described in detail, being the second study of woods from this stratigraphic unit, after that of Pujana et al. (2007).The Upper Cretaceous deposits of the main part of the Kuji Group are distributed along a band running from northwest to southeast of Japan (Fig 1).The Kuji Group is composed of three parts, the Tamagawa, Kunitan, and Sawayama formations (e.g. Terui and Nagayama., 1995; Umetsu and Kurita, 2007).The lower component of the Tamagawa Formation is formed by shallow marine or terrestrial deposits ...The Yamama Formation is underneath by the Upper Jurassic to Lower Cretaceous Sulaiy Formation which consists mainly of sub-basinal chalky and argillaceous limestone. The Jurassic-Cretaceous boundary in southern Iraq passes through the upper part of this Formation, (Sadooni, 2018), Fig. 2 (see Fig. 3). Download : Download high-res image (539KB)Upper Cretaceous (lower-middle Turonian—middle Campanian), Xiaguan Formation, Neixiang County, Henan Province, China. Diagnosis. Small basal neoceratopsian with the following autapomorphies ...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.Campanian Stage, fifth of six main divisions (in ascending order) in the Upper Cretaceous Series, representing rocks deposited worldwide during the Campanian Age, which occurred 83.6 million to 72.1 million years ago during the Cretaceous Period.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.

Introduction. The Menefee Formation represents one of the most promising frontiers for exploring the early evolution of major dinosaur groups in Laramidia, the Upper Cretaceous landmass consisting of Mexico, the western United States, western Canada, and Alaska (Fig. 1 in Sampson et al. (2010)).Dating to approximately 84-78 million years ago (Siemers & King, 1974; Molenaar et al., 2002 ...

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 ...

The Hell Creek Formation (HCF), from the upper Great Plains of the North American Western Interior remains the global standard for understanding terrestrial Cretaceous–Paleogene (K–Pg) extinction events. This is because the HCF preserves an extraordinarily abundant and diverse terrestrial biota within the same stratigraphic units.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 ...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 ...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 ... The largest pterosaur discovered in South America and one of the largest flying vertebrates in the world is described. Thanatosdrakon amaru gen. et sp. nov. is a new azhdarchid found in the upper-most levels of the Plottier Formation (upper Coniacian-lower Santonian, Neuquén Basin), Mendoza, Argentina.Two specimens were identified, the holotype (UNCUYO-LD 307) and the paratype, with an ...The authors report a new genus and species of titanosaurian sauropod, Abditosaurus kuehnei, from the Late Cretaceous (ca. 70.5 Ma) of Spain. A. kuehnei groups phylogenetically with South American ...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 … See moreTiny, ornamented eggs and eggshell from the Upper Cretaceous of Utah represent a new ootaxon with theropod affinities Sara E. Oser, Karen Chin, Joseph J. W. …Arambourgiania Philadelphias (ARAMBOURG 1959) from the Maastrichtian (Upper Cretaceous) of Ruseifa, Jordan, is one of the largest pterosaurs known and was an animal comparable in size to the North ...The integument of the theropod dinosaur Carnotaurus sastrei from the Upper Cretaceous of Argentina is here described in detail for the first time. The scaly skin of this abelisaurid is the most completely preserved of any theropod and the only example of this form of integument known outside of Tetanurae (excluding footprints). The skin is ...The Cretaceous Period was a time of great inundation by shallow seas that created swamp conditions favourable for the accumulation of fossil fuels at the margin of land areas. ... Another rock type, called the Urgonian limestone, is similarly widespread in the Upper Barremian-Lower Aptian. This massive limestone facies, whose name is commonly ...

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 ...The fossil record for neoceratopsian (horned) dinosaurs in the Lower Cretaceous of North America primarily comprises isolated teeth and postcrania of limited taxonomic resolution, hampering previous efforts to reconstruct the early evolution of this group in North America. An associated cranium and lower jaw from the Cloverly Formation (?middle-late Albian, between 104 and 109 million years ...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.Instagram:https://instagram. phillips 66 big 12 championshiphow to adobe signbackpage eugene oregoncomprehension instruction Dec 1, 2021 · The Nenjiang Formation is part of the post-rift thermal subsidence section of the Songliao Basin that contains a nearly complete record of upper Lower Cretaceous to lower Paleocene lacustrine sediments in the basin centre (Deng et al., 2013, Feng et al., 2010, Wang et al., 2013). ku workdaywriting a communications plan 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 ... Cenomanian Stage, first of six main divisions (in ascending order) in the Upper Cretaceous Series, representing rocks deposited worldwide during the Cenomanian Age, which occurred 100.5 million to 93.9 million years ago during the Cretaceous Period. Rocks of the Cenomanian Stage overlie those of dimension of an eigenspace The Upper Cretaceous of Kansas Introduction by Erasmus Haworth. At the close of the Comanche period, already described by Professor Prosser, the outlines of the North American continent were well formed and were similar to the continent as now known excepting a narrow inland sea reaching from the southern part of the United States to beyond the limits of Canada, and probably connecting with ...Fossiliferous deposits of the Greenhorn Limestone (Upper Cretaceous) are found on the Comanche National Grassland in southeastern Colorado. The lowest portion of the Greenhorn Limestone, the base of the Lincoln Limestone Member, contains calcarenite beds rich in disarticulated remains of marine vertebrates. We examined the composition of the ...