Results 201 to 210 of about 7,296 (255)

ORBITAL CHRONOSTRATIGRAPHY OF THE VALANGINIAN–HAUTERIVIAN BOUNDARY: A CYCLOSTRATIGRAPHIC APPROACH

2004
Based on cyclostratigraphy and sequence stratigraphy criteria, an orbital chronostratigraphy is here proposed for the Upper Valanginian/Lower Hauterivian (Lower Cretaceous) stratigraphic interval. For such a purpose two biostratigraphically constrained carbonate platform sections have been measured and sampled at centimetre scale in southern Italy: (1)
Ferreri, V, Amodio, S, Sandulli, R, D'Argenio, B   +3 more
openaire   +4 more sources

A new record of the Weissert episode from the Valanginian succession of Cehegín (Subbetic, SE Spain): Bio- and carbon isotope stratigraphy

Cretaceous research (Print), 2018
A biostratigraphic and geochemical study (C and O isotopes) of one of the most complete Valanginian sections of the External Zones of the Betic Cordillera (Cehegin composite section), together with its correlation with other European basins, is presented
R. Aguado, J. M. Castro, G. A. Gea, J. Molina, L. Nieto, P. Ruiz‐Ortiz   +5 more
semanticscholar   +1 more source

High-resolution stratigraphy and palaeoenvironments of the Volgian-Valanginian in the Olenek key section (Anabar-Lena region, Arctic East Siberia, Russia)

Revue de Micropaleontologie, 2018
The Volgian-Valanginian shallow-water deposits from the Olenek key section (Anabar-Lena region, Arctic Siberia) were studied by sedimentological, palaeontological and geochemical methods.
B. Nikitenko, E. Pestchevitskaya, S. Khafaeva   +2 more
semanticscholar   +1 more source

Astrochronology of the Valanginian Stage from GSSP Candidates and Hypostratotype

2014
The Valanginian Stage currently displays no radiometric age, which severely hampers palaeoceanographic reconstructions for this time interval. An astrochronology of the Valanginian Stage using the stable 405-kyr eccentricity cycle was performed on biostratigraphically well-calibrated standard sections from the Vocontian Basin (southeastern France ...
Martinez, Mathieu, Deconinck, Jean-François, Pellenard, Pierre, Reboulet, Stéphane, Riquier, Laurent   +4 more
openaire   +2 more sources

New Valanginian–Hauterivian neocomitid ammonites from the Neuquén Basin, Argentina

Cretaceous Research, 2018
Abstract Three distinct, rich neocomitid faunas occur in the Agrio Formation (middle Valanginian to lowermost Barremian). In the ammonite sequences between, neocomitids are very rare and limited to two thin horizons. The lower, upper Valanginian level has yielded Neocomites (Varlheideites) cf.
Beatriz Aguirre-Urreta, Peter F. Rawson
openaire   +1 more source

Barkerina dobrogiaca Neagu, 2000, a Valanginian marker taxon from the northern Neotethysian margin

Cretaceous research (Print), 2019
Barkerina dobrogiaca Neagu (Valanginian of Romania), a medium-sized complex benthic foraminifera, is described from the Valanginian of the Pontides, NE Turkey. Barkerina dobrogiaca differs from the type-species B.
F. Schlagintweit, I. Bucur, B. Granier, R. Koch   +3 more
semanticscholar   +1 more source

Upper Valanginian to Lower Hauterivian coral faunas from the Sierra Larga (Prebetic zone, SE Spain)

Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 2019
From the Upper Valanginian and Lower Hauterivian of the Sierra Larga (Prebetic zone, SE Spain) two small faunas of colonial corals are taxonomically described. The Valanginian fauna encompasses 23 species and the Hauterivian fauna 11 species.
H. Loser, C. Arias, L. Vilas
semanticscholar   +1 more source

Relative sea-level changes and sedimentary facies development of the lowermost Cretaceous (Berriasian–Valanginian) cycles in the north of Ar Riyad city, Saudi Arabia

Journal of Asian Earth Sciences, 2018
A new high-resolution stratigraphic framework for the thick and well-exposed Lower Cretaceous rocks of Saudi Arabia has been provided. The studied successions consist mainly of carbonates with minor interbedded siliciclastics, forming the Silayy, Yamamah
Emad Nagm, A. Bamousa, A. Memesh, I. A. Babikir, S. Dini   +4 more
semanticscholar   +1 more source

A Valanginian (Early Cretaceous) ‘boreal nannoplankton excursion’ in sections from Romania

Marine Micropaleontology, 2001
Abstract In order to resolve both sea-level and palaeoclimatic signals for the earliest Cretaceous, 161 calcareous nannofossil samples of Berriasian to Valanginian age have been studied from Romania. These samples are derived from three biostratigraphically well-dated sections of Tethyan litho- and biofacies. The nannofossil assemblages recorded are
Mihaela Melinte, Jörg Mutterlose
openaire   +1 more source

Valanginian and Hauterivian marine ostracods from Patagonia (Argentina): Correlations and palaeogeography

Revue de Micropaléontologie, 2008
Abstract Some Early Cretaceous ostracod assemblages from the Neuquen Basin (West Central Argentina) share taxa with roughly coeval faunas previously reported from South Africa. Five assemblages are dealt with, from which two are proposed as formal biostratigraphic zones.
Eduardo A. Musacchio, Margarita Simeoni
openaire   +1 more source