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Showing 1 to 20 of 38 for “"maastrichtian"”.
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Sequence Stratigraphy of Campanian-Maastrichtian Strata in Eastern Alabama
<p>Eastern Alabama is an area of interest due to the transition from the Gulf Coastal Plain to the Atlantic Coastal Plain. Coastal Plain investigations have been sparse compared to research conducted in the oil rich areas down dip in the Gulf of Mexico. A sequence stratigraphic framework using the …
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A Foraminiferal Biostratigraphy of the Campanian and Maastrichtian Chalks of the United Kingdom.
… from twenty-seven sections of Campanian and Maastrichtian chalk from both the onshore and offshore United Kingdom have been studied. In total, 160 species and subspecies belonging to 54 genera have been recorded and a complete revision of their systematics, with full synonomies and …
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Maastrichtian - upper Eocene ostracoda of the subfamily Trachyleberidinae from Iraq, Jordan and Syria
Abstract available: p 16.
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Taphonomy of a Lance Formation(Maastrichtian, WY) Dinosaur Bonebed with a Focus on Tooth Traces
<p>The Rose Quarry bonebed found in the Maastrichtian Lance Formation of eastern Wyoming possesses a complex blendof taphonomic signatures. Disarticulated, disassociated, fragmented bones of various states of abrasion from dinosaurs, turtles, and crocodilians are clustered together in a channelized …
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Dinoflagellate Cyst Biostratigraphy, Palynofacies and Paleoenvironmental Analysis of the Maastrichtian and Basal Danian, Brazon River, Texas
… and paleoenvironmental record of the Maastrichtian Neylandville and Corsicana Formations and the lower part of the Danian Kincaid Formation from the Brazos River, Texas. Rock samples are exposed to standard palynological methods for biostratigraphic interpretations. The quantitative …
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Organic-walled microplankton biostratigraphy and paleoecology of the Maastrichtian Prairie Bluff Chalk formation of central and western Alabama
… of the Prairie Bluff Chalk is restricted to late Maastrichtian. The Prairie Bluff Chalk correlates to the upper Providence Formation of Georgia (Firth 1984); the lower Providence being early Maastrichtian. The basal Clayton Formation may be latest Maastrichtian in age
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Depositional History and Stratigraphic Framework of Upper Cretaceous (Campanian to Maastrichtian) Strata in the Minerva-Rockdale Oil Field of Milam County and Adjacent Counties, Texas.
… The targeted Navarro Group is Upper Cretaceous (Maastrichtian) in age and ranges in depth from approximately 100 to 3000+ ft. (subsea). Several thin elongated sandy zones within the Kemp clay of the Corsicana (Navarro) Formation, are the current targets for oil production. These sandy zones are …
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Benthic foraminiferal change and depositional history across the Cretaceous – Paleogene (K/Pg) boundary in the Brazos River area, Texas
… an erosional relief of ~1 m, cut into the Maastrichtian mudstone succession, creating a mounded topography. The overlying ‘Event Bed’, containing reworked impact spherules at its base, is shown to infill troughs on this irregular surface. The same features were recorded in tributary creeks, …
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Mid- to late Cretaceous Microbiostratigraphy, Palaeo-ecology and Palaeogeography of the Sergipe Basin, northeastern Brazil
… have been studied through the upper Aptian to Maastrichtian sedimentary succession of the Sergipe Basin, northeastern Brazil. The systematic taxonomy of the microfauna studied is documented and completely revised. Palaeo-environmental models, mostly derived from micropalaeontological and …
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The extinction of the rudist bivalves
… were at their most diverse at the Campanian/Maastrichtian boundary. Their decline lasted until I almost the end of the Maastrichtian after which the only survivors are Tertiary forms. The decline is related to the disappearance of rudist facies with the end Cretaceous regression, though that …
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Dinoflagellate biostratigraphy and organic-walled phytoplankton cyst paleoecology of the Demopolis-Ripley transition interval from the Upper Cretaceous Selma Group of Mississippi and Alabama
… the study sections is correlated with the lower Maastrichtian of western Europe. Also, on the basis of the data from the present study and other unpublished dinoflagellate cyst data, the Campanian-Maastrichtian boundary in the Selma Group is shown to lie at some point within the middle one-half …
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Biostratigraphy of Cretaceous and Paleogene Strata from Northern Yukon Territory and District of Mackenzie, Northwest Territories
… early Campanian, mid- to late Campanian and late Maastrichtian. Distribution of biostratigraphic ages confirms deposition of the Eagle Plain Group as a prograding succession and that Cody Creek strata are time transgressive from south to north. Strata from the East Fork and Little Bear formations …
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Provenance, geochronology and sedimentary characteristics of the Campanian M1 Sandstone, Napo Formation, Oriente Basin, Ecuador
The Campanian-Maastrichtian M1 Sandstone is one of the major oil reservoir units of the Napo Formation in the Oriente Basin of Ecuador. Heterogeneous reservoir behavior suggests that the depositional environments of the M1 Sandstone were laterally variable, such that they generated complex …
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Estratigrafia e paleoambientes em rochas da formação gramame nas pedreiras do Roger em João Pessoa – PB.
… Quarries Roger in João Pessoa - PB, during the Maastrichtian inserted in Gramame formation in the Paraíba Basin. This thesis aimed to gather knowledge stratigraphic and paleoenvironmental existing quarries in the Roger in João Pessoa - PB. By analyzing the profiles 28 stratigraphic layers were …
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The benthonic foraminifera across the Cretaceous-Tertiary boundary in the Zin Valley, Negev, Israel
… in depth towards the outer shelf range.Some Maastrichtian benthonic forms were found to survive into the Danian, which is a special feature of this region. The Midwayan fauna has many similarities with assemblages from Egypt, sharing some species only known from Egypt.HH was thought to be the …
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Organic-walled microplankton paleoecology and biostratigraphy of the Upper Cretaceous Ripley Formation, southwestern Georgia
… and Firth's (1984) zonations suggest a Lower Maastrichtian age for all strata in this study.
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Depositional Model of a Late Cretaceous Dinosaur Fossil Concentration, Lance Formation
<p>A large Maastrichtian, nearly monospecific bonebed in the Lance Formation in eastern Wyoming has yielded 13,000 bones and fragments since 1996. Though excavation of the site continues, little is known of the circumstances and processes of deposition. This study aims to provide a depositional …
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The Integration Of Morphology, Variation, And Phylogenetics To Better Understand Fossil Taxa And Their Modern Relatives
… is the first diagnostic dromaeosaurid from the Maastrichtian of the southern United States (southern Laramidia). The specimen also reveals aspects of this dinosaurs behavior, including potential wounds or injuries consistent with an active predatory lifestyle, features that would have made it …
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Osteology, Morphometrics, and Phylogenetic Systematics of the ‘Booneville Dinosaur’ (Ornithopoda: Hadrosauridae) From the Early–Middle Campanian Coffee Formation of Northeastern Mississippi
… Embayment from the Coniacian through the Maastrichtian of the Late Cretaceous. MMNS VP-12239, also known colloquially as the Booneville Dinosaur, is an iguanodontian ornithopod discovered at the Booneville Dinosaur Site, an outcropping of the Coffee Formation in northeastern Mississippi. …
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Structure and stratigraphy of the Antelope Mountain Quartzite, Klamath Mountains, Northern California
… field area, and are overlapped by Coniacian to Maastrichtian sandstone of the Hornbrook Formation, thus tightly bracketing deformation to the mid- to Late Cretaceous. This deformation provides an ancient example of intra-arc extension expressed solely in the pre-extensional metasedimentary …
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