Results 21 to 30 of about 1,389 (158)

Aptian carbonate platform development in the Southern Iberian Palaeomargin (Prebetic of Alicante, SE Spain)☆

open access: yesBSGF - Earth Sciences Bulletin, 2019
The Aptian stratigraphic record of the Alicante region consists of: a rudist and coral-rich carbonate platform of earliest Aptian age (Llopis Formation), with a discontinuous siliciclastic member at its top; followed by late Early, to Late Aptian ...
Skelton Peter W.   +2 more
doaj   +1 more source

Chemostratigraphic characteristics of trace elements, biomarkers and clay mineralogy indicating environmental conditions within Aptian sediments of the Organyà Basin, North‐east Spain, prior to the onset of OAE 1a

open access: yesThe Depositional Record, 2022
Shifting palaeoceanographic and palaeoclimatic conditions together with fluctuating eustatic sea levels during the Early Cretaceous Aptian stage led to a globally widespread deposition of organic‐rich marine sediments designated Oceanic Anoxic Event 1a ...
Carlos Herdocia   +1 more
doaj   +1 more source

STRATIGRAPHIC FRAMEWORK AND SEDIMENTARY FEATURES OF THE LOWER APTIAN 'LIVELLO SELLI' IN THE LOMBARDY BASIN (SOUTHERN ALPS, NORTHERN ITALY)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2017
A stratigraphic unit, Early Aptian in age, equivalent to the Lower Aptian Livello Selli of the Umbria-Marche Basin, has been recognized in the Lombardy Basin (Southern Alps) and is here described.
RICCARDO BERSEZIO
doaj   +1 more source

Earliest Aptian Caprinidae (Bivalvia, Hippuritida) from Lebanon [PDF]

open access: yesCarnets de géologie (Notebooks on geology), 2015
The presence in Lebanon of Offneria murgensis and Offneria nicolinae, two characteristic components of the Early Aptian Arabo-African rudist faunas, fills a distributional gap of the corresponding assemblage between the Arabic and African occurrences, on the one hand, and the Apulian occurrences, on the other hand.
Masse, Jean-Pierre   +4 more
openaire   +1 more source

The coelurosaur theropods of the Romualdo formation, early Cretaceous (Aptian) of Brazil: Santanaraptor placidus meets Mirischia asymmetrica

open access: yesThe Anatomical Record, EarlyView.
Abstract The upper carbonate concretion levels of the Romualdo Formation (Aptian, Brazil) have yielded several theropod dinosaur remains, including spinosaurids and the coelurosaurs Santanaraptor placidus and Mirischia asymmetrica, the phylogenetic affinities of which are controversial.
Rafael Delcourt   +4 more
wiley   +1 more source

THE APPEARANCE OF THE GENUS DESHAYESITES (KAZANSKY, 1914, AMMONOIDEA) IN THE LOWERMOST APTIAN (LOWER CRETACEOUS) OF LA BÉDOULE (SE FRANCE)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 1999
New palaeontological and biostratigraphic investigations were carried out at La Bédoule (SE France), which is the stratotype-area of the Bedoulian (Lower Aptian).
FABRIZIO CECCA   +2 more
doaj   +1 more source

Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil)

open access: yesThe Anatomical Record, EarlyView.
Abstract Pterosaur dental biology remains poorly understood despite its importance for comprehending feeding strategies and flight adaptations. Here, we present the first comprehensive histological analysis of an ornithocheiriform pterosaur tooth from the Lower Cretaceous Crato Formation (Santana Group, Northeast Brazil).
Tito Aureliano   +3 more
wiley   +1 more source

The Aptian Stage: Back to fundamentals

open access: yesEpisodes, 2011
The original definitions of the Aptian, Albian and Urgonian stages by d'Orbigny (1840, 1842, 1847, respectively) on the basis of lithological and paleonto- logical criteria were sufficiently clear and should not have generated the misinterpretations and confusion that began at the end of the 19th century and continue today. The purpose of this paper is
Moullade, Michel   +2 more
openaire   +3 more sources

Aptian Angiosperm Pollen from the Ticó Flora Patagonia, Argentina [PDF]

open access: yesInternational Journal of Plant Sciences, 2013
Six angiosperm pollen types studied with SEM are recorded in the Cretaceous (early Aptian) Tico flora on the basis of material recovered from two localities: Anfiteatro de Tico and Bajo Tigre. Clavatipollenites dominates, with four types described. The other two types, based on single specimens, were referred to Retimonocolpites and to the Anacostia ...
Archangelsky, Sergio, Archangelsky, Ana
openaire   +2 more sources

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

open access: yesThe Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro   +7 more
wiley   +1 more source

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