Upper cretaceous

The Upper Cretaceous aquifer of Cretaceous age is a regionally extensive but relatively little-used aquifer in the northern Mississippi embayment. Throughout much of its area of occurrence, this aquifer is the deepest freshwater source available. Because it is commonly overlain by high-

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 ...Apr 1, 2022 · The upper Cretaceous biostratigraphic marker species in tropical areas are considered important events for the present study, and some have been incorporated and are called unique events (UE). In the graphic representation, they are identified by a double asterisk, and since they are present in less than four out of seven wells, RASC does not ... 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.from 34 sections of the Upper Cretaceous of extra-Carpathian Poland and western Ukraine (Figure 1) were analysed by us. In addition to the re-evaluation of the previously studied.Upper Cretaceous to Paleogene nonmarine sedimentary rocks of southwest Utah record Sevier foreland basin sedimentation, Laramide-style folding and intermontane sedimentation, and cessation of Laramide deformation. The formations that record this tectonic evolution arc, from oldest to youngest, the Iron Springs, Kaiparowits, Canaan Peak, Grand ...

Scientific Reports - A new ankylosaurid skeleton from the Upper Cretaceous Baruungoyot Formation of Mongolia: its implications for ankylosaurid postcranial evolutionPaleoenvironmental 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.Upper Jurassic–Lower Cretaceous facies transition. Important limestone unit thickness changes characterize all the studied sections and significant variations are recorded, in terms of facies stacking patterns and depositional environments. Two main depositional models define the Upper Jurassic–Lower Cretaceous transition in the studied area.Our study builds on an earlier examination of the landscape abundance of megaherbivorous dinosaurs of the Upper Jurassic Morrison Formation of the western United States (Farlow et al., 2010), but now considers the abundance of Morrison large theropods, and extends consideration to the tyrannosaurids of the Upper Cretaceous Dinosaur Park ...Field investigation, Microfacies analysis, and biostratigraphy have been carried out in the central parts of the Ionian Basin (Aetoloakarnania area, Western Greece) in order to decipher the depositional environments that developed during the accumulation of the Upper Cretaceous to Eocene carbonate succession. Three different Standard Microfacies types (SMF) have been observed, corresponding to ...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 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.

Prince Creek Formation. / 70.0; -151.5. / 83.2; -115.9. The Prince Creek Formation is a geological formation in Alaska with strata dating to the Early Maastrichtian stage of the Late Cretaceous. Dinosaur remains are among the fossils that …Four pliosaurid fossils from Japanese Upper Cretaceous are described/redescribed. • Two specimens represent large individuals whose skull size …A second hole, Hole 258A, was drilled to 123.5 meters below seafloor (mbsf) with the goal of improving recovery of the upper portion of the sequence. Cretaceous sediments discussed in this study consist of nannofossil ooze (258A-8 through -9), nannofossil chalk (cores 258-5 through -13) and organic-rich claystone (258-14) with a distinctive ...The Upper Cretaceous succession is quite complete, with small hiatuses mostly present in the lower part (Marcinowski Citation 1980; Walaszczyk Citation 1987). The upper Campanian-lowermost Maastrichtian interval treated in this study is exposed near the town of Solec nad Wisłą (Figure 1).

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Upper Cretaceous subsurface stratigraphy and structure of coastal Georgia and South Carolina is based on the study of 24 wells along two transects, one extending across the seaward-dipping sedimentary basin termed the 'Southeast Georgia Embayment' northeastward to the crest of the Cape Fear Arch, and the other alined east-west, parallel to the basin axis and including the COST GE-l well on the OutUpper Cretaceous rocks investigated in this report include (in ascending order) the middle and upper parts of the Mancos Shale, Mesaverde Group (Formation), and lower part of the North Horn Formation. Nomenclature for these rocks is complex and has been used inconsistently by previousThe fossil record of basal paravians in Gondwana is still poorly known, being limited to the Cretaceous unenlagiids from South America and the problematic Rahonavis from Madagascar. Here we report on a new paravian from the Cenomanian-Turonian (Late Cretaceous) of Río Negro province, NW Patagonia, Argentina. The new taxon exhibits a derived bird-like morphology of the forelimbs (e.g., robust ...Géologie Méditerranéenne Tome XXI, n° 3-4, 1994, pp. 89-91. The Upper Cretaceous geodynamic evolution of the Adriatic-Dinaric carbonate platform(s).

Four pliosaurid fossils from Japanese Upper Cretaceous are described/redescribed. • Two specimens represent large individuals whose skull size …Einiosaurus is a genus of herbivorous centrosaurine ceratopsian dinosaur from the Upper Cretaceous (Campanian stage) of northwestern Montana.The name means 'bison lizard', in a combination of Blackfeet Indian eini and Latinized Ancient Greek sauros; the specific name (procurvicornis) means 'with a forward-curving horn' in Latin. Einiosaurus is medium …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.Thirty-four core shale samples from the Upper Cretaceous Mamu Formation, southeastern Nigeria, were studied using XRD and geochemical analyses to constrain their provenance, tectonic setting, palaeoweathering and palaeoredox conditions during deposition.X-ray diffraction analysis revealed the presence of clay minerals (kaolinite, illite and illite-smectite mixed layer) and non-clay minerals ...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 Yezo Group, and other Upper Cretaceous units in Japan, have yielded various marine vertebrates from all stages, although fragmentary remains dominate the fossil record (e.g, Obata et al., 1972; Sato et al., 2012). Further careful search for pliosaurid remains in these strata are necessary to verify whether the demise of the pliosaurids also ...The presence of Hedycaryoxylon in several Upper Cretaceous Antarctic localities indicates the continuation of the icacinoid type of fossil wood, one of the two types prevailing in the middle Cretaceous (Wheeler & Lehman, 2009), extending into high latitudes to the early Campanian. Similarities to extant wood.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 ...First Upper Cretaceous dinosaur track assemblage from Jordan (Middle East) - preliminary results September 2020 Annales Societatis Geologorum Poloniae 90:331 - 342Sep 1, 2021 · These successions correspond to four distinct tectono-sedimentary phases, from older to younger forming the Upper Paleozoic Karoo Supergroup, the Cretaceous Galula Formation, the Oligocene Nsungwe Formation and the Miocene-Recent Lake Beds strata (Roberts et al., 2012) (Fig. 1).

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 .

Upper Cretaceous tyrannosauroid material from North America was primarily known from upper Campanian through Maastrichtian formations until the recent discovery of derived tyrannosaurid taxa from lower-to-mid Campanian deposits in the southwestern United States. However, diagnostic material from contemporaneous deposits further north in Alberta ...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 ...The Upper Cretaceous marine succession of the Kristianstad Basin was deposited during a number of transgressive events, when the sea level periodically rose up to about 100 m higher than it is today (Sahagian et al., 1996; Kominz et al., 2008). The relatively small-sized basin was situated at the northeastern margin of the epeiric Chalk …Despite the abundant literature on limnic Cretaceous ostracode faunas, the database on mid-Late Cretaceous taxa is still scarce. The Songliao Basin in northeastern China preserves a diverse assemblage of ostracode fossils from the Santonian–Campanian Nenjiang and Sifangtai formations. 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 the Jurassic period about 145 ...The Upper Cretaceous-Lower Paleogene succession at Gabal Qreiya area that covers six rock units, Quseir, Duwi, Dakhla, Tarawan, Esna, and Thebes formations, is reviewed through a high-resolution sequence stratigraphic analysis. Six third-order depositional sequences and their associated surfaces and systems tracts are recognized based on stratigraphic, sedimentological, and high-resolution ...3.1 Cretaceous to Early Eocene. The Sabah basement rock mostly includes metamorphic, igneous, ultrabasic rock, and cherts (Chert-Spilite Formation) associated with ophiolite complex that formed during Early Cretaceous [].Based on the presence of ophiolites, Hutchison [] interpreted this unit as oceanic crust although some authors such as Reinhard and Wenk [] and Leong [] believe that the ...

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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 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.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). Typical oil source rocks are present in non ...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 …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 Upper Cretaceous, tropical dinoflagellate cysts database includes more presumably photo-autotrophic (170) species than heterotrophic (92). The photo-autotrophic flora's diversity and abundance suggest that they were the dominant primary producers in the tropics during the Upper Cretaceous.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 ...During the last three decades, several basal ceratopsians have been unearthed in Upper Jurassic and Lower Cretaceous strata in Asia and North America, including Yinlong downsi 1, Chaoyangsaurus ...In the lower Cretaceous, the structural traps are usually controlled by faults, such as faulted noses or tilted fault blocks. Although structures in lower Cretaceous is greater in number, they are more complex and faulted. The scale and amplitude of structural traps in lower Cretaceous is also smaller than that in upper Cretaceous.The pre-rift sediments of the Gulf of Suez Basin were deposited in continental margin sags. The first subsidence cycle deposited clastic Nubia Formation during Carboniferous-Lower Cretaceous period, while the second subsidence cycle commenced from Upper Cretaceous and deposited mixed siliciclastic-carbonate sediments (Atia et al. 2015).The eastern Tunisian margin is considered an Upper Cretaceous and Eocene petroleum province. It has been affected by Mesozoic rifting and Cenozoic compression. Several oil and gas shows and accumulations have been discovered in Upper Cretaceous carbonates within structural anticlinal closures. These anticlinal highs represent inherited rift platform horsts with hiatuses, unconformities and ...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 ... ….

Two species of the heteromorph ammonite genus Diplomoceras Hyatt are described from the Upper Cretaceous of the James Ross-Seymour Islands area, Antarctica. The late Campanian-early Maastrichtian D. lambi Spath has a relatively high rib density, whereas D. maximum n. sp. has a lower rib density and is known only from the uppermost Maastrichtian of the Lopez de Bertodano Formation on ...Einiosaurus is a genus of herbivorous centrosaurine ceratopsian dinosaur from the Upper Cretaceous (Campanian stage) of northwestern Montana.The name means 'bison lizard', in a combination of Blackfeet Indian eini and Latinized Ancient Greek sauros; the specific name (procurvicornis) means 'with a forward-curving horn' in Latin. Einiosaurus is medium …The upper part of Member 1 (214-155 m) displays a general upwards. Summary and conclusions. Based on TOC and Rock-Eval pyrolysis data, oil shales and organic-rich mudstones of the Upper Cretaceous Qingshankou and Nenjiang formations in the Songliao Basin are excellent source-rocks for oil, containing Type I OM.In the early Cretaceous, many of the southern continents were still joined together as part of the southern landmass called Gondwana. Northern continents formed the great landmass Laurasia. ... Goannas evolved in the northern hemisphere in the Upper Cretaceous Period about 90 million years ago. Discover more. Australia through time.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 Lower Cretaceous is the first geological epoch in the Cretaceous. It began 145 million years ago, and ended 100.5 million years ago. ... In the Lower Cretaceous, the sea level was much lower than in the Upper Cretaceous. In the Wealden, Southern England was a huge tropical river delta; in the Greensand the same areas were just offshore.The paleobiology of the Cretaceous neoselachian shark,Squalicorax, has largely been based on isolated teeth. We examined partial and nearly complete skeletons of three species ofSqualicorax, S. falcatus (Aoassiz),S. kaupi (Agassiz), andS. pristodontus (Agassiz), that were collected from the U.S.A. These specimens suggest that the total body length (TL) ofS. falcatus typically measured 1.8-2. ...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 ...Apr 1, 2012 · 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 ... Upper cretaceous, The Upper Cretaceous site of Lo Hueco (Cuenca, Spain) has yielded several specimens of titanosaurs, in various degrees of articulation and completeness, being the most common tetrapods in the assemblage . Preliminary comparisons indicate the presence of, at least, two titanosaur species in Lo Hueco based upon two distinct types of cranial ..., 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 ..., The alvarezsaurids are best known from the Upper Cretaceous of the Gobi Desert in Mongolia and northern China, although they are among the rarest theropod dinosaurs there. Even the fragmentary specimen PIN 5838/1, the holotype of Ondogurvel alifanovi described herein is among the most complete alvarezsaurid specimens known from the Gobi Desert., 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 ..., 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)., The Mesaverde Group in the Book Cliffs area, Utah (Fig. 1) is a molasse of Upper Cretaceous (Campanian to Maastrichtian) age that prograded from the Sevier Orogenic belt in central Utah eastward across the Western Interior Basin. The Desert Member of the Blackhawk Formation and the overlying Lower Castlegate Sandstone are two of several fluvial ..., The Upper Cretaceous-Paleogene strata are developed in the basin, fed predominantly with alluvial and fluvial sediments with lacustrine deposits like siltstones and mudstones that are the major petroleum source rocks in all these basins (Shinn et al., 2010; Xu and Gao, 2015a; Xu et al., 2018)., England. Extent. southern and eastern England. The Chalk Group (often just called the Chalk) is the lithostratigraphic unit (a certain number of rock strata) which contains the Upper Cretaceous limestone succession in southern and eastern England. The same or similar rock sequences occur across the wider northwest European chalk ' province '., The Upper Cretaceous Hall Lake Formation is exposed in south-central New Mexico in Sierra County, primarily across the Cutter sag, between the Fra Cristobal Mountains to the north and Caballo Mountains to the south (Kelley and Silver, 1952; Lucas et al., 2019) (Fig. 1).The Hall Lake Formation was previously considered a member of the McRae Formation (e.g., Lozinsky et al., 1984; Wolberg et al ..., The Upper Cretaceous succession (formerly the Colville Group, which was abandoned by Mull et al., 2003) includes the upper part of the Hue Shale and the Seabee, Tuluvak, lower part of Canning, Schrader Bluff, and Prince Creek Formations (Fig. 2).Upper Cretaceous strata are absent on the highstanding Arctic Platform owing to either nondeposition or erosion, and are absent due to erosion across ..., Smaller calcareous benthic foraminiferal fauna consists of 198 species with observed stratigraphic ranges from upper Cretaceous to early Paleogene are documented from Cauvery Basin. One species has been described as new species. This compilation is based on well cutting samples of 17 exploratory wells from sub-surface litho units Kamalapuram Formation of early Eocene — Paleocene age and the ..., 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 Wind River Basin of central Wyoming trends west-northwest from near the community of Alcova to near the town of Dubois (fig. 1). On the perimeter of the basin, outcrops of the Frontier Formation were examined and described during the years 1972-1975. Invertebrate fossils were collected from those outcrops during the years 1972-1996, in places with the assistance of other earth scientists ..., Dinosaurs from the Upper Cretaceous period in the western United States. Artwork showing the following dinosaurs (from left) Pachycephalosaurus, ..., The 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)., Abstract. A new florula, dominated by angiosperm leaves, is reported from the Upper Cretaceous (Turonian?) Malihah Formation of Saudi Arabia. The leaves are fragmentary preserved as impressions with a rust coloured, mineral coating, thus it is only possible to describe the best-preserved leaf forms as morphotaxa for the time being., Ours is the first formal description of and nomenclature for the Upper Cretaceous and Lower Paleogene geological formations of this region and we tie these names to regional correlations over multiple modern territorial boundaries. The ancient seaway left intriguing and previously unclassified phosphate deposits that, quite possibly, represent ..., Apr 1, 2012 · 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 ... , England. Extent. southern and eastern England. The Chalk Group (often just called the Chalk) is the lithostratigraphic unit (a certain number of rock strata) which contains the Upper Cretaceous limestone succession in southern and eastern England. The same or similar rock sequences occur across the wider northwest European chalk ' province '., The Upper Cretaceous theropod fossil record in Europe. Upper Cretaceous (Turonian-Maastrichtian) theropod sites in the European archipelago are mainly located in central and eastern Europe (Austria, Bulgaria, Hungary, Romania and the European part of Russia) and the Ibero-Armorican domain (France, Spain and Portugal). ..., A new genus and two new species Coronidilar yanae gen. et sp. nov. and Cretodilar multinervius sp. nov. (Neuroptera: Dilaridae), were described from Upper Cretaceous (Cenomanian) amber of northern Myanmar. They are assigned to this family by the typical male antenna with unipectinate flagellum (Coronidilar yanae sp. nov.), proximal and median nygmata present (both species); Coronidilar yanae ..., 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 ..., 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 ..., 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 ..., 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, Thirty-four core shale samples from the Upper Cretaceous Mamu Formation, southeastern Nigeria, were studied using XRD and geochemical analyses to constrain their provenance, tectonic setting, palaeoweathering and palaeoredox conditions during deposition.X-ray diffraction analysis revealed the presence of clay minerals (kaolinite, illite and illite-smectite mixed layer) and non-clay minerals ..., The Lameta Formation (Upper Cretaceous) is exposed in parts of central and western India as detached outcrops and covers an area of nearly 5000 km2. It generally rests on Precambrian and "Gondwana" rocks and is invariably capped by Deccan Trap volcanic flows. In the Nand and Dongargaon areas of the Chandrapur and Nagpur districts of Maharashtra ..., The Upper Cretaceous deposits of northwestern Colombia accumulated in two regions with distinct tectonic settings. The eastern deposits, consisting of Turonian-Maastrichtian rocks from the Upper ..., 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)., The Upper Cretaceous deposits of Maryland, by W.B. Clark.--The petrography and genesis of the sediments of the Upper Cretaceous of Maryland, by M.I. Goldman.--The Upper Cretaceous floras of the world, by E.W. Berry.--, 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 ... , 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 ... , The previous oldest known fossil snakes date from ~100 million year old sediments (Upper Cretaceous) and are both morphologically and phylogenetically diverse, indicating that snakes underwent a ...