Results 91 to 100 of about 7,015 (163)

Les Phylloceratoidea (Ammonoidea) aptiens et albiens du bassin vocontien (Sud-Est de la France) [Aptian and Albian Phylloceratids (Ammonoidea) from the Vocontian Basin (SE France)]

open access: yesCarnets de Géologie, 2008
More than 2,200 pyritized ammonites of the Superfamily Phylloceratatoidea have been collected in consonance with the scale of the ammonite zonation of the expanded Marnes Bleues Fm in the Vocontian Basin (SE France).
Joly Bernard, Delamette Michel
doaj  

Lower Aptian ammonite and carbon isotope stratigraphy in the eastern Prebetic Domain (Betic Cordillera, southeastern Spain)

open access: yesGeologica Acta, 2012
Major global palaeobiologic and palaeoenvironmental changes occurred during the Early Aptian. Precise dating and timing of the different events is crucial to determine possible cause-effect relationships between them.
J.A. MORENO BEDMAR   +8 more
doaj  

The Unitary Association (UA) range chart of the Aptian-Early Albian of EAB

open access: yes, 2017
The Unitary Association (UA) range chart of the Aptian-Early Albian of ...
Kassab, Walid   +3 more
core   +1 more source

Climate variability and relationship with ocean fertility during the Aptian

open access: yes, 2014
The late Barremian-early Aptian time interval was marked by intense volcanic activity of the Ontong Java Plateau (OJP) which induced a global perturbation in the ocean-atmosphere system culminating in the early Aptian Oceanic Anoxic Event (OAE) 1a ...
D. Tiraboschi   +5 more
core   +2 more sources

Substantiation of the Barremian/Aptian boundary

open access: yes, 1999
This paper focuses on the Barremian/Aptian boundary in the Trans-Caspian area. Results of a stratigraphical study of the uppermost Barremian and the lower Aptian succession in the Trans-Caspian area are presented. The bed-by-bed description of three sections — Keldzhe, Tekedzhik and Utuludzha — is given as well as detailed lithologic columns.
Bogdanova, T.N., Prozorovsky, V.A.
openaire   +1 more source

The Aptian of Lanestosa (Bizkaia): palaeotectonic implications

open access: yes, 1997
The Aptian of Lanestosa is analyzed based on detailed mapping and facies analysis. Four sedimentary units are differentiated: a basal terrigenous unit and three overlying carbonate platform units.
López Horgue, Mikel A.   +2 more
core  

Aptian-turonian events in central Tunisia : [pre-symposium field trip] [PDF]

open access: yes, 2005
Géologie alpine. Série spéciale Colloques et excursions, ; 5 155 pThe central part of Tunisia is fonned by anticlines, the axis of which are oriented SW-NE. These mountains, called Jebel, are separated by alluvial plains. The mountains consist usually of
Arnaud Vanneau, Annie, Zghal, Ihsen
core  

A new small-bodied azhdarchoid pterosaur from the Lower Cretaceous of England and its implications for pterosaur anatomy, diversity and phylogeny

open access: yes, 2013
BackgroundPterosaurs have been known from the Cretaceous sediments of the Isle of Wight (southern England, United Kingdom) since 1870. We describe the three-dimensional pelvic girdle and associated vertebrae of a small near-adult pterodactyloid from the ...
Darren Naish (115424)   +11 more
core   +1 more source

A bioprovince for the Barremian–Aptian charophytes of the Central Tethyan Archipelago

open access: yesCretaceous Research
A comprehensive bibliographic compilation of dozens of worldwide records of charophytes from the Barremian to early Aptian interval has been revisited aiming to gather the regional and global distribution data for the clavatoracean family. The compiled data were studied with the palaeontological statistics software PAST (PAleontological STatistics ...
Alba Vicente   +4 more
openaire   +3 more sources

Fluctuations of sea-water chemistry during Gargasian (Middle Aptian) time. Data from trace-element content (Mg, Sr, Mn, Fe) in hemipelagic carbonates from La Marcouline Quarry (Cassis, SE France)

open access: yesCarnets de Géologie, 2007
In the Lower Aptian historical stratotype area (Cassis-La Bédoule, SE France), a geochemical study of the Gargasian (Middle Aptian) marl-limestone alternations of the La Marcouline quarry complements data already obtained from Bedoulian (Early Aptian ...
TRONCHETTI Guy   +5 more
doaj  

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