Results 161 to 170 of about 2,463 (208)

Biostratigraphy and magnetostratigraphy of the upper Tithonian–Berriasian of the Crimean Mountains [PDF]

open access: yesCretaceous Research, 2018
Abstract Our data from studies over many years on upper Tithonian–Berriasian strata of the Crimean Mountains are summarised. Their zonal subdivision has been significantly refined using ammonites and foraminifera, as well as on the basis of calpionellid, ostracod and dinocyst distributions.
Vladimir Arkadiev   +7 more
openaire   +2 more sources

Palaeobiogeography of Tethyan ammonites during the Tithonian (latest Jurassic)

Palaeogeography, Palaeoclimatology, Palaeoecology, 1999
Abstract This study deals with the palaeobiogeographic distribution of Tethyan ammonites in the Tithonian. In particular, the relationships between ammonites of the Mediterranean Tethys, East Africa, Caribbean and Southeast Pacific areas are discussed.
Fabrizio Cecca
exaly   +2 more sources

Cieneguiticeras, a new genus of Tithonian oppeliids (Ammonoidea, Late Jurassic)

Geobios, 2010
Abstract The new genus Cieneguiticeras , assigned to the family Oppeliidae, is described on the basis of Andean lower-middle Tithonian ammonites from Arroyo Cieneguita, west-central part of the Neuquen-Mendoza Basin, Argentina. The macroconchs are closely homoeomorphic with Neochetoceras Spath and the microconchs have a ‘glochiceratid’-type ...
Horacio Parent   +2 more
exaly   +2 more sources

Stratigraphy of Tithonian (Ohauan‐Puaroan) marine beds near Port Waikato, New Zealand, and a redescription of Belemnopsis aucklandica (Hochstetter)

open access: yesNew Zealand Journal of Geology, and Geophysics, 2001
Some 1500 m of marine Ohauan and Puaroan strata in the Port Waikato region of New Zealand are restudied in an attempt to resolve lithostratigraphic and biostratigraphic anomalies in published works.
A B Challinor
exaly   +1 more source

The Pliensbachian and Tithonian extinction events

Nature, 1986
The claim by Raup and Sepkoski1, that an approximately 26-Myr mass extinction periodicity can be recognized on a global scale at family level over the past 250 Myr, has excited much attention and provoked speculation about an ultimate extraterrestrial cause2–10.
openaire   +1 more source

Zapaliinae, a new subfamily of Tithonian–Berriasian ataxioceratid ammonites

PalZ, 2017
The recent recognition of the earliest Andean Tithonian ammonite fauna (Picunleufuense Zone) has allowed a balanced classification of the ataxioceratid ammonites, reflecting their phylogenetic relationships. The Picunleufuense Zone fauna, first recognized in the Neuquen Basin at the base of the Vaca Muerta Formation, is represented by numerous records ...
Horacio Parent   +3 more
openaire   +1 more source

A new Tithonian ophthalmosaurid ichthyosaur from Coahuila in northeastern Mexico

Alcheringa: An Australasian Journal of Palaeontology, 2021
Historically, Mexican Jurassic ichthyosaurs have been referred to European representatives of the cosmopolitan family-level clade Ophthalmosauridae.
Jair Israel Barrientos-Lara   +1 more
openaire   +1 more source

Ammonite habitats in the Early Tithonian of Western Tethys

Lethaia, 1992
Cccca, F. 1992 07 15: Ammonite habitats in the Early Tithonian of Western Tethys. Habitats of Early Tithonian ammonites of Western Tethys are inferred from analysis of faunal spectra, functional morphology. facies characteristics and palaeogeography.
openaire   +1 more source

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