Upper cretaceous.
Type of Dinosaur: Theropod Existed: Late Cretaceous, 71-68 Mya Where found: Alberta, Canada Estimated length: 8-10 m (26-33 ft.) Albertosaurus was a member of the dinosaur family Tyrannosauridae (the same family to which T. rex and Gorgosaurus belong). The first Albertosaurus specimen to be found was a partial skull. It was discovered in 1884 on an expedition led by Canadian geologist Joseph ...
The Upper Cretaceous, especially the latest Campanian and Maastrichtian period denoted for the first time that marine deposits were continuously and widely distributed across the whole GSB and its proximate regions (Snyder et al. 1985) coupled with carbonate accumulation. Thereby, conducting a paleoenvironmental study using Upper Cretaceous ...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 ...A new genus and species of tetrablemmid spider, Electroblemma bifida n. gen. et sp., is described, from two adult males found in Upper Cretaceous (Cenomanian) amber of Myanmar. The genus is distinguished by its enormous dorsal carapace projection and highly modified chelicerae.Scarce basin remnants of Cretaceous synorogenic sediments exposed in the Medvednica, Ivanščica, Žumberak Mts. and Samobor Hills of northern Croatia record the early orogenic history of the NW Dinarides. The provenance of sandstones from five clastic formations (Oštrc, Bistra, Kravljak, Vivodina and Glog) which cover a time span from Early to late Late Cretaceous was studied by combining ...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 ...
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.Jun 1, 2023 · Dinosaurios Cretaceous tetrapods of Argentina; J.F. Bonaparte et al. Los saurópodos de América los grupos Neuquén y Chubut, y sus relaciones cronológicas; J.F. Bonaparte et al. A continental assemblage of tetrapods from the Upper Cretaceous beds of El Brete, northwestern Argentina (Sauropoda, Coelurosauria, Carnosauria, Aves)
Nevertheless, the Upper Cretaceous source rocks are mostly matured, but its hydrocarbon generation is limited because of lower TOC (only 0.5-0.8%) and thinner thickness (only 10 m). The main effective source rock is the AG Group in the Lower Cretaceous, which is distributed throughout the area.
Sauropod hiatus. The sauropod hiatus is a period in the North American fossil record for most of the Late Cretaceous noted for its lack of sauropod remains. It may represent an extinction event, possibly caused by competition with ornithischian herbivores, habitat loss from the expansion of the Western Interior Seaway, or both.In this article, we have obtained new paleomagnetic and magnetic anisotropy datasets from the upper Cretaceous to lower Eocene sedimentary rocks in the Cuojiangding area, and combined them with published paleomagnetic data, regional geological reports, biostratigraphic ages and U Pb zircon geochronology to discuss their tectonic implications. 2.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.Japanese Upper Cretaceous marine reptile fossils occur in five major stratigraphical units: the Yezo, Kuji, Futaba, Izumi, and Goshoura groups (Figs. 1 and 2; Table 1).Many of these specimens were excavated by private collectors and donated to local museums; therefore, their locality data is based solely on museum records and/or published accounts.
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 ...
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 ...
Major, trace and rare earth elements (REE) composition of sandstones from the Upper Cretaceous Sillakkudi Formation, Ariyalur Group, Cauvery Basin were studied to decipher their weathering and provenance history. Texturally, these sandstones are immature, poorly sorted and grain supported. Abundance of feldspars especially, plagioclase indicates rapid deposition of sediments from a nearby ...Upper Cretaceous to Miocene; skull laterally flattened; choanae in depression in anterior part of pterygoids. Suborder Eusuchia Upper Jurassic to Recent; choanae entirely enclosed by pterygoids. Family Alligatoridae (alligators and caimans) 4 genera and 8 species; teeth of lower jaw fit inside those of upper jaw.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 …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 …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 ...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 .
In the early Cretaceous, many of the southern continents were still joined together as part of the southern landmass called Gondwana.The provenance of upper Cretaceous strata in the Tethys Himalaya provides critical constraints on the closure time of the Neo-Tethys Ocean and the initial India-Asia collision. This paper reports detailed petrographic studies, in-situ detrital zircon U-Pb ages and Lu-Hf isotopic analyses, whole rock Nd-isotopes, and Cr-spinel electronic microprobe data from upper Cretaceous clastic ...Preliminary study of a diverse dinosaur assemblage from the Upper Cretaceous of Zhuzhou, Hunan Province. Acta Palaeontol Sin. 56:1-9. [Google Scholar] Han FL, Xu X, Sullivan C, Huang LQ, Guo Y, Wu R. 2019. New titanosauriform (Dinosauria: sauropoda) specimens from the Upper Cretaceous daijiaping Formation of southern China. Peer J.We divide Upper Jurassic–Lower Cretaceous strata of the broadly defined Bisbee basin into five regionally correlative tectonostratigraphic assemblages (TSAs; Fig. 2). Tectonostratigraphic assemblages “record phases of basin history during which the fundamental controls of tectonic setting, subsidence style, and basin geometry are relatively ...Upper Cretaceous rocks reach a thickness of 2400m in the southern Ajdabiya Trough compared with 600m on the adjacent platforms. Because of its depth little is known about the northern part of the trough. The Ajdabiya Trough covers an area of 22,500km 2 and extends from the coast at Al Brayqah to the Kalanshiyu High in the south. South of the ...Figure 2. Blufftown Formation In eastern Alabama, the bottom layers of the Upper Cretaceous sequence are composed mainly of river sediments and take the form of a combination of river and coastal deposits in western and west-central areas of Alabama; these oldest deposits are called the Tuscaloosa Formation. Younger detrital strata are found mainly in eastern and east-central Alabama (Figure 2 ...
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 biostratigraphy of the East European Platform (EEP) and adjacent regions has been based on the Western European macropaleontological standard (Olferiev and Alekseev, 2005), since the Turonian-Campanian siliceous deposits of the Moscow and Voronezh regions and the Volga Basin (Ulyanovsk, Volgograd and Saratov Regions) are very poor considering the faunal groups ...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 ...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 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 ...Abstract. A new troodontid dinosaur, Papiliovenator neimengguensis gen. et sp. nov., from the Upper Cretaceous (Campanian) Wulansuhai Formation at Bayan Manduhu, Inner Mongolia, China, is described here. The holotype (BNMNH-PV030) consists of a nearly complete cranium and fragmentary postcranial bones in semi-articulation and this specimen is ...The study area is located in the Rosario Embayment on the Pacific coast of Baja California, Mexico (Fig. 1 a and b).The Rosario Embayment consists of Upper Cretaceous to Palaeocene sedimentary rocks that constitute part of the Peninsular-Ranges fore-arc basin complex (Morris and Busby-Spera, 1990).Sediments within the fore-arc basin were sourced from the Upper Jurassic to Upper Cretaceous ...First Upper Cretaceous dinosaur track assemblage from Jordan (Middle East) - preliminary results September 2020 Annales Societatis Geologorum Poloniae 90:331 - 342Winton 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.
Magnetostratigraphy provides a continuous and precise chronological framework for constraining changes in the SAR in the Longmenshan foreland basin. …
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.
Udanoceratops belonged to the Ceratopsia (the name is derived Greek meaning 'horned face'), a group of herbivorous dinosaurs with parrot -like beaks which thrived in North America and Asia during the Cretaceous Period. [1] It is placed within the Leptoceratopsidae, as the only Asian representative at the time, along with the North …The Upper Cretaceous Postalm section in the Northern Calcareous Alps (Austria) exposes pelagic deposits of the northwestern Tethys whose cyclostratigraphy and palaeoenvironments were examined in this study. The section displays rhythmic deposits of Santonian to late Campanian age (Gosau Group). The Santonian/Campanian transition is ...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 ...Research highlights The provenance of upper Cretaceous strata in the Tethys Himalaya provides significant constraints on the closing of the Neo-Tethys Ocean and the initial India-Asia collision. We carried out a detailed provenance study on the upper Cretaceous clastic sedimentary rocks of the northern Tethys Himalaya, near Gyangze, southern Tibet. Provenance drastically changed from the ...Tlatolophus galorum, gen. et sp. nov., a parasaurolophini dinosaur from the upper Campanian of the Cerro del Pueblo Formation, ... Before the present research, this subfamily was represented by 22 genera and 28 species recovered from Upper Cretaceous deposits of North America, Asia, Africa, and Europe (Table 1) ...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 ...Isopach maps of Upper, Middle, and Lower Cretaceous are contoured at intervals of 500 feet. Each of these three isopach maps is overprinted in color to show generalized lithofacies trends. Lower and Middle Cretaceous deltaic sandstone fairways on the western shelf provide excellent reservoir rocks for a trend containing many of the world’s ...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.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).The Upper Jurassic-Lower Cretaceous nonmarine rocks of the study area contain three depositional sequences. The first of these, the UJ-1 sequence, consists primarily of an aggradational systems ...
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.The hydrocarbon can also be generated from the Upper Cretaceous or Tertiary marine shale if they are buried in the deeper depression center (e.g., below thick turbidite fan), which migrates into the Upper Cretaceous and Tertiary reservoirs (especially the turbidite reservoir), and the seal is contemporaneous marine shale.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 .Instagram:https://instagram. thryve comfour postulates of natural selectionkansas university football game todayphognet gridiron 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). The Donga Formation is predominantly Type III kerogen of very poor to ...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. timothy hurdbig 12 ku A mixed Upper Cretaceous carbonate‐shale succession is well exposed in the Gyabukeqing section of Guru town, Yadong County, southern Tibet, which tectonically belongs to the southern Tethyan ... royale high 2023 summer halo chart 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. 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 ...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 ...