Results 11 to 20 of about 684 (174)

Tithonian-berriasian beds of dedine stream near Golubac [PDF]

open access: yesGlasnik Srpskog Geografskog Društva, 2007
The possibilities for stratigraphical precision between the Upper Jurassic and the Lower Cretaceous in pelagic development are considered for the locality of Dedine stream.
Carević Ivana, Jovanović Velimir
doaj   +3 more sources

Multi‐proxy sequence stratigraphy of a mixed carbonate–siliciclastic shelf across the Jurassic–Cretaceous transition

open access: yesThe Depositional Record
Relative sea‐level change, climate variability and sediment supply exert a first‐order control on the architecture of mixed carbonate–siliciclastic shelves, yet their combined expression in fine‐grained successions with low facies diversity remains ...
Hamdi Omar, Adnene Lafi, Chokri Yaich
doaj   +2 more sources

The sexual dimorphism in the Tithonian, Jurassic, simoceratid ammonite Lytogyroceras [PDF]

open access: yesActa Palaeontologica Polonica
The family Simoceratidae Spath, 1925, lumps various formsbelonging to lineages with different roots and is clearlyparaphyletic. One of its genera is Lytogyroceras Spath, 1924,which stands apart from the typical forms of the familybearing strong ribbing ...
Horacio Parent, Enrique Ramos-Agustino
doaj   +2 more sources

Evolutionary Stability of the Shark Snout: Geometric Morphometrics of Ventral Facial Openings. [PDF]

open access: yesAnn N Y Acad Sci
Landmark‐based geometric morphometrics of 453 shark species reveal that ventral head morphology is conserved across Selachii. Morphospace and ancestral reconstructions support strong phylogenetic control and limited divergence from ancestral conditions.
Aicardi S   +8 more
europepmc   +2 more sources

Preliminary Appraisal of a Correlation Between Glaciations and Large Igneous Provinces Over the Past 720 Million Years

open access: yesGeophysical Monograph Series, Page 169-190., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Nasrrddine Youbi   +9 more
wiley  

+2 more sources

Revision of the Late Jurassic teleosaurid genus Machimosaurus (Crocodylomorpha, Thalattosuchia) [PDF]

open access: yesRoyal Society Open Science, 2014
Machimosaurus was a large-bodied genus of teleosaurid crocodylomorph, considered to have been durophagous/chelonivorous, and which frequented coastal marine/estuarine ecosystems during the Late Jurassic.
Mark T. Young   +10 more
doaj   +1 more source

High-precision U–Pb ages in the early Tithonian to early Berriasian and implications for the numerical age of the Jurassic–Cretaceous boundary [PDF]

open access: yesSolid Earth, 2019
The numerical age of the Jurassic–Cretaceous boundary has been controversial and difficult to determine. In this study, we present high-precision U–Pb geochronological data around the Jurassic–Cretaceous boundary in two distinct sections from different ...
L. Lena   +10 more
doaj   +1 more source

Sedimentology and hydrocarbon generation potential of middle tithonian-berriassian chia gara formation,well k-109, Kirkuk oil field, NE Iraq [PDF]

open access: yesKirkuk Journal of Science, 2007
The Chia Gara Formation (M.Tithonian-Berriasian) from the well K-109 has been studied in detail sedimentologically and from hydrocarbon potentiality point of view. The studied rock samples obtained from the North Oil Company, Kirkuk.
doaj   +1 more source

A juvenile pleurosaurid (Lepidosauria: Rhynchocephalia) from the Tithonian of the Mörnsheim Formation, Germany. [PDF]

open access: yesAnat Rec (Hoboken)
AbstractLate Jurassic rhynchocephalians from the Solnhofen Archipelago have been known for almost two centuries. The number of specimens and taxa is constantly increasing, but little is known about the ontogeny of these animals. The well‐documented marine taxon Pleurosaurus is one of such cases.
Beccari V   +5 more
europepmc   +5 more sources

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