Upper cretaceous.

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 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 ...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 Dinosaur Park Formation is the uppermost member of the Belly River Group (also known as the Judith River Group), a major geologic unit in southern Alberta.It was deposited during the Campanian stage of the Late Cretaceous, between about 76.5 and 74.4 million years ago. It was deposited in alluvial and coastal plain environments, and it is bounded …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 ...

Upper Cretaceous rocks of western Kansas are a treasury of fossils that has excited paleontologists for more than a century and has lured generations of enthusiastic collectors to concretion-strewn shale slopes and chalk badlands that break the monotony of the Great Plains. For decades, authors of historical geology and paleontology textbooks ...The Maastricht Formation (Dutch: Formatie van Maastricht; abbreviation: MMa), named after the city of Maastricht in the Netherlands, is a geological formation in the Netherlands and Belgium whose strata date back to the Late Cretaceous, within 500,000 years of the Cretaceous–Paleogene boundary, now dated at .The formation is part of the Chalk …

Thorough sedimentological and palaeontological analyses of four expanded Upper Cretaceous sections in northern Tademait had allowed us to address and reconsider the stratigraphical framework of the so-called 'Continental Intercalary' and 'Hamada series' in this remote Saharan area. These four sections (i.e., Meguidene, Gara Samani, Oued El Mezaourou-Gour Louazouaza, and El Menia ...

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 ...Upper Cretaceous basin-floor fans in the Voring Basin, Mid Norway shelf 1(53 They are interpreted as concentrated flow to turbidity flow deposits modified by a wave field appearing at the ambient water-flow interface during deposition, as is commonly observed for channel spillover deposits. However, reworking by deep-storm waves cannot be ...The Cretaceous/Palaeogene mass extinction eradicated 76% of species on Earth 1, 2. It was caused by the impact of an asteroid 3, 4 on the Yucatán carbonate platform in the southern Gulf of Mexico ...The Cretaceous sedimentary basins in Mongolia are grouped into three major depositional provinces (Altai, Khangai-Khentei and Gobi) with ten basins (basins of Great Lakes, Valley of Lakes, Arkhangai, Onon, Choir-Nyalga, Choibalsan, Transaltai Gobi, Umnogobi, Dornogobi and Tamsag), which are all filled by continental deposits with abundant vertebrate and invertebrate fossils as well as plant ...

Section 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 ...

A prior study involved 78 Collembola specimens preserved in Upper Cretaceous (Campanian) amber from Canada. This work deals with 109 specimens from the mid Cretaceous (Cenomanian or possibly slightly lower) of Myanmar, 37 of which have been identified to the generic level; 14 new species are described.

Géologie Méditerranéenne Tome XXI, n° 3-4, 1994, pp. 89-91. The Upper Cretaceous geodynamic evolution of the Adriatic-Dinaric carbonate platform(s).Cretaceous Period. During this period, oceans formed as land shifted and broke out of one big supercontinent into smaller ones. Continents were on the move in the Cretaceous, busy remodeling the ...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 …In addition, U-Pb detrital zircon age spectra within the upper Xigaze forearc stratigraphy are similar to those from Eocene foreland basin strata south of the Indus-Yarlung suture near Sangdanlin, suggesting that the Xigaze forearc was a possible source of Sangdanlin detritus by ca. 55 Ma. We propose a model in which the Xigaze forearc ...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 ...

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 ...Upper Cretaceous rocks of western Kansas are a treasury of fossils that has excited paleontologists for more than a century and has lured generations of enthusiastic collectors to concretion-strewn shale slopes and chalk badlands that break the monotony of the Great Plains. For decades, authors of historical geology and paleontology textbooks ...More information: Brian A. Atkinson et al, Ancient diversity and turnover of cunninghamioid conifers (Cupressaceae): two new genera from the Upper Cretaceous …Oct 18, 2023 · Cretaceous Period, in geologic time, the last of the three periods of the Mesozoic Era. The Cretaceous began 145.0 million years ago and ended 66 million years ago; it followed the Jurassic Period and was succeeded by the Paleogene Period (the first of the two periods into which the Tertiary Period was divided). Section snippets Locality and horizon. The fossil material here described comes from the Upper Cretaceous Chorrillo Formation (upper Campanian-Maastrichtian), La Anita Farm, near El Calafate city, in southwest Santa Cruz Province, Patagonia, Argentina (Fig. 1).The stratigraphic succession of the Chorrillo Formation is made up of intercalated levels of greenish and reddish sandstones, with ...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 regional Cretaceous structural and isopach/lithofacies maps of the Middle East provide a unique overview of the major tectonic and stratigraphic developments in the leading petroleum basin of the World. The structural map of the Near Top Cretaceous and the Upper Cretaceous isopach show that most of the tectonic elements of the region ...

The Cretaceous period is the ninth and longest period in the Phanerozoic eon, lasting 80 million years from 145 to 65 million years ago (mya). It followed the Jurassic period, and is the third and last period of the Mesozoic era. After it came the Cainozoic era. [1] The Cretaceous period has just two very long epochs : Upper Cretaceous 100.5 ...The Cretaceous period has just two very long epochs: Upper Cretaceous 100.5 million years ago (mya) to 65 mya; Lower Cretaceous 145.5 mya to 100.5 mya. The Lower Cretaceous at ~45 million years, is the longest epoch in the Phanerozoic eon. Though famous for its land fauna, the Cretaceous sea level rose much higher than today. The Tanjero Formation is an Upper Cretaceous (Maastrichtian) unit, which crops out within the Imbricated and High Folded Zones in northeastern Iraq. It stretches like a narrow northwest–southeast belt near and more or less parallel to the Iranian border (Karim et al. 2020).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).--Systematic paleontology, Upper Cretaceous, by E.W. Berry, H.A. Pilsbry, J.A. Gardner, R.S. Bassler, W.B. Clark, L.W. Stephenson.--General index.-- ...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 ...

16 de out. de 2022 ... Was life on Earth ever like a fairy tale? Perhaps if you go back a hundred million years ago, in the Cretaceous period. How else to call the ...

Furcatoceratops (meaning "forked horned face") is a genus of centrosaurine ceratopsid dinosaur from the Late Cretaceous Judith River Formation of Montana. The type species is Furcatoceratops elucidans. Discovery and naming NSM PV 24660, which is the holotype specimen ... NSM PV 24660 was collected from rocks of the upper Coal Ridge Member ...

May 1, 2022 · Detailed field and lithostratigraphic studies are carried out on the Upper Cretaceous-Lower Paleogene section at Esh El-Mellaha area, Gulf of Suez, Egypt. The section is located at Wadi Dib west ... 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 ...Ammonites are the most important macrofossils for biostratigraphy in the Cretaceous period (e.g., Kennedy and Cobban 1977; Kennedy 1986). This is due to the world-wide distribution of many species and a fast dispersal of hatchlings that is the main factor controlling distribution (e.g., Scheltema 1977; De Baets et al. 2015b), associated with high evolutionary rates (Kennedy 1977, Ward and ...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 ...The Cretaceous (IPA: / k r ɪ ˈ t eɪ ʃ ə s / krih-TAY-shəs) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest.At around 79 million years, it is the longest geological period of the entire Phanerozoic.The name is derived from the Latin creta, "chalk", which is abundant in the latter ...The Lance (Creek) Formation is a division of Late Cretaceous (dating to about 69 – 66 Ma) rocks in the western United States. Named after Lance Creek, Wyoming, the microvertebrate fossils and dinosaurs represent important components of the latest Mesozoic vertebrate faunas. The Lance Formation is Late Maastrichtian in age ( Lancian land ...The Cretaceous sedimentary basins in Mongolia are grouped into three major depositional provinces (Altai, Khangai-Khentei and Gobi) with ten basins (basins of Great Lakes, Valley of Lakes, Arkhangai, Onon, Choir-Nyalga, Choibalsan, Transaltai Gobi, Umnogobi, Dornogobi and Tamsag), which are all filled by continental deposits with abundant vertebrate and invertebrate fossils as well as plant ...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 origin of modern rainforests can be traced to the aftermath of the bolide impact at the end of the Cretaceous. Carvalho et al. used fossilized pollen and leaves to characterize the changes that took place in northern South American forests at this time (see the Perspective by Jacobs and Currano). They not only found changes in species ...The Upper Cretaceous/Paleogene marine sedimentary rocks of the Moroccan High Atlas host phosphate-rich sediments bracketed by calcareous nannofossil Zones (NP4-NP9) of late Danian to Thanetian age.New ornithomimid material discovered from the Upper Cretaceous Packard Shale Formation, (Cabullona Group) of Sonora, Mexico is described. The material includes a partial skeleton, which is assigned to a new genus and species, Tototlmimus packardensis.This new taxon differs from other ornithomimids in having five unique characteristics that separate it from other Northamerican ornithomimids: (1 ...Sea level was higher during most of the Cretaceous than at any other time in Earth history, and it was a major factor influencing the paleogeography of the period. In general, world oceans were about 100 to 200 metres (330 to 660 feet) higher in the Early Cretaceous and roughly 200 to 250 metres (660 to 820 feet) higher in the Late Cretaceous than at present.

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, southern Santa Cruz Province of Argentina, making it ...The Bohemian Cretaceous Basin was an intra-continental basin formed during the Cenomanian-Santonian (100.5-83.6 Ma) as a seaway between the Boreal Sea and Alpine Ocean (Fig. 1).The basin originated by the reactivation of a fault system in the Variscan basement of the Bohemian Massif, and combined features of an epeiric sea formed during global transgression with those of a tectonically ...The Upper Cretaceous coastline in the study area, imme- diately south of the modern Fall Line, reached at least to Colum - bus, Georgia, and possibly farther inland (Fig. 1).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.Instagram:https://instagram. american freight reynoldsburgapa style formatinghooding ceremony for master's degreecrawford community center The Mesozoic extends over 187 million years from the beginning of the Triassic (252 Ma) to the end of the Cretaceous (65.5 Ma). It was a particularly important period for the geology of western Canada. During this time, several continental collisions occurred along the west coast, resulting in the formation of the Rocky Mountains and the.The Upper Cretaceous Nenjiang lacustrine shale (K 2 n) is one of the most essential hydrocarbon source rocks in NE China with massive OM deposition across the Santonian-Campanian boundary interval, which can be correlated with the terminal stage of the last oceanic anoxic event in the Cretaceous, OAE3. This study focuses on the lower part of ... young rock wikipediaphd laboratory science 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 ... how much did slaves sell for in the 17th century Online. Angel Alejandro Ramírez Velasco, Felisa J. Aguilar, René Hernández-Rivera, José Luis Gudiño Maussán, Marisol Lara Rodríguez, Jesús Alvarado Ortega, Tlatolophus galorum, gen et sp. nov ., a parasaurolophini dinosaur from the upper Campanian of the Cerro del Puebño Formation, Coahuila, norther Mexico, Cretaceous Research, abril de …Find out information about Upper Cretaceous. The late epoch of the Cretaceous period of geologic time, beginning about 90 million years ago. McGraw-Hill Dictionary of Scientific …