Results 31 to 40 of about 7,617 (206)

REVISION OF THE AMPHIASTRAEIDAE FROM THE MONTI D'OCRE AREA(SCLERACTINIA; EARLY CRETACEOUS)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2012
The four Amphiastrea species from the Early Aptian of the Monti d'Ocre area described as new by Prever (1909) are revised on the basis of the type material. One species - Amphiastrea paronai - remains in this genus.
HANNES LÖSER
doaj   +1 more source

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

The lower Aptian ammonites of the Les Ferres Aptian Basin (Lower Cretaceous, Southeast of France) Part I: Introduction and biostratigraphy [PDF]

open access: yesCarnets de géologie (Notebooks on geology), 2019
On the southern margin of the Vocontian Basin (SE France), for taphonomic reasons (fragmentation, reworking, pyritization), lower Aptian (Lower Cretaceous) deposits of the interval between the Deshayesites deshayesi and Dufrenoyia furcata zones are usually not suitable for studying the late ontogenetic developments of ammonites (fossil cephalopods). In
Bersac, Stéphane, Bert, Didier
openaire   +2 more sources

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

Clathrate hydrate crystallization

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley   +1 more source

Seismic Sequence Stratigraphy Applied to Reservoir Recognition and Evolution on Marine Carbonatic Ramp—Macaé Group (Albian to Cenomanian) of Campos Basin

open access: yesGeological Journal, EarlyView.
A classic oil producing interval of the Campos Basin—Macaé Group is revisited through seismic stratigraphic analysis, providing a stratigraphic framework, characteristic depositional and relative time positioning for several complex structural settings.
Renata Alvarenga   +12 more
wiley   +1 more source

Upper Aptian Serre Chaitieu (Niveau Fallot) grey values and susceptibility

open access: yes, 2003
Upper Aptian Serre Chaitieu (Niveau Fallot) grey values and ...
Friedrich, Oliver   +1 more
core   +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

The Earliest Feathers from the Lower Cretaceous Dabeigou Formation of North Hebei: Implications for the Early Evolution of the Jehol Biota

open access: yesIntegrative Zoology, EarlyView.
This study reports two isolated feather fossils from the Lower Cretaceous Dabeigou Formation in northeastern China. Morphological analyses identified them as the earliest known feathered theropods (potentially including avian) in the Jehol Biota. This finding reveals a complex ecosystem at the dawn of the Jehol Biota, bridging the temporal and faunal ...
Qian Wu   +2 more
wiley   +1 more source

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