نتایج جستجو برای: valanginian

تعداد نتایج: 119  

Journal: :Journal of Petroleum Exploration and Production Technology 2021

Abstract Gamtoos Basin is an echelon sub-basin under the Outeniqua offshore of South Africa. It a complex rift-type basin with both onshore and components consists relatively simple half-grabens bounded by major fault to northeast. This study mainly focused on evaluation reservoir heterogeneity Valanginian depositional sequence. The prime objective this work generate 3D static model for better ...

Journal: :Earth and Environmental Science Transactions of The Royal Society of Edinburgh 2022

ABSTRACT The Jurassic to Cretaceous strata exposed in the Rollrock Section, Sverdrup Basin, Arctic Canada, represent one of northernmost continuous outcrops spanning this poorly understood transition. Oxfordian–Valanginian mudstones Section were deposited a shallow marine environment and, as such, provide ideal lithology investigate response high latitude dinoflagellate cyst populations frequen...

Journal: :Cretaceous Research 2021

Two acmes of the genus Crioceratites were recorded in current loryi Zone (lower Hauterivian) Lower Cretaceous series south-eastern France (Vocontian Basin), both classic section Cheiron ravine (Castellane area) and Hauterivian GSSP area at La Charce. The revision an abundant material allows us to define claveli sp. nov. first acme part second correspond range C. not as previously admitted. rema...

Journal: :Journal of South American Earth Sciences 2021

Although the Neuquén Basin (Argentina) has an extensive record of fossil vertebrates for Upper Cretaceous, little is known about Early Cretaceous vertebrate faunas. The Mulichinco Formation (early Valanginian), where some dinosaur bone sites were found, provides important additional insights into composition continental fauna that age. osteological studies sauropod and theropod dinosaurs have b...

2015
Paul Upchurch Philip D. Mannion Michael P. Taylor Ulrich Joger

The sauropod dinosaur "Pelorosaurus" becklesii was named in 1852 on the basis of an associated left humerus, ulna, radius and skin impression from the Early Cretaceous (Berriasian-Valanginian) Hastings Beds Group, near Hastings, East Sussex, southeast England, United Kingdom. The taxonomy and nomenclature of this specimen have a complex history, but most recent workers have agreed that "P." bec...

2015
Clint A. Boyd Darrin C. Pagnac Andrew Farke

Knowledge regarding the early evolution within the dinosaurian clade Ankylopollexia drastically increased over the past two decades, in part because of an increase in described taxa from the Early Cretaceous of North America. These advances motivated the recent completion of extensive preparation and conservation work on the holotype and only known specimen of Dakotadon lakotaensis, a basal ank...

2015
Ignacio Díaz-Martínez Xabier Pereda-Suberbiola Félix Pérez-Lorente José Ignacio Canudo

BACKGROUND Large ornithopod tracks are known from the Upper Jurassic to the uppermost Cretaceous rocks of all continents but Antarctica. They include the tracks historically called Iguanodon footprints, iguanodontid footprints, hadrosaur/hadrosaurid footprints, and other large ornithopod tracks that have been used to define ichnotaxa. More than 40 ichnospecies based on large ornithopod tracks h...

2017
Anthony Romilio Jorg M. Hacker Robert Zlot George Poropat Michael Bosse Steven W. Salisbury

The abundant dinosaurian tracksites of the Lower Cretaceous (Valanginian-Barremian) Broome Sandstone of the Dampier Peninsula, Western Australia, form an important part of the West Kimberley National Heritage Place. Previous attempts to document these tracksites using traditional mapping techniques (e.g., surface overlays, transects and gridlines combined with conventional photography) have bee...

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