Carnets de Géologie - Notebooks on Geology
Launched in 2002 this open-access e-journal presents peer-reviewed papers in the field of sedimentology, stratigraphy, and paleontology.
- Last build:
- Tue, 4 Sep 2007 15:00:00 GMT
- Language:
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RSS FEED IDEMS: Carnets de Géologie - Notebooks on Geology
- The upper Bedoulian and lower Gargasian Ostracoda of the Aptian stratotype: Taxonomy and biostratigraphic correlation
In the vicinity of Saint-Saturnin-lès-Apt (Vaucluse, SE France), which is included in the area of the historic Aptian stratotype of Apt-Gargas, are four sections in a succession that permits the study in a very detailed and continuous way of the last beds of the upper Bedoulian and those of the lower Gargasian. (...) SRef-ID: http://overview.sref.org/1634-0744/CG2007_A05 Handle-ID: http://hdl.handle.net/2042/8877
Wed, 25 Jul 2007 15:00:00 GMT - Morphological variability of Globorotalia menardii (planktonic foraminifera) in two DSDP cores from the Caribbean Sea and the Eastern Equatorial Pacific
Variability in the test of Globorotalia menardii during the past 8 million years has been investigated at DSDP Site 502A (Caribbean Sea) and DSDP Site 503A (Eastern Equatorial Pacific). (...)
Mon, 2 Jul 2007 16:00:00 GMT - 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)
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) sediments there. (...)
Mon, 2 Jul 2007 15:00:00 GMT - The Gargasian (Middle Aptian) of La Marcouline section at Cassis-La Bédoule (SE France): Stable isotope record and orbital cyclicity
Bulk rock stable isotope analysis of La Marcouline section (Cassis-La Bédoule area, SE France) revealed a general trend of decreasing δ13C and δ18O values from the bottom to the top of the section. The decrease in δ13C values reflects a global trend in Middle Aptian times, namely a return to pre-excursion values of δ13C values following a major, positive excursion in the Early Aptian, which is a reflection of the Oceanic Anoxic Event (OAE) 1a. (...)
Thu, 24 May 2007 19:00:00 GMT - Relations between the northern and southern margins of the Tethys ocean during the Cretaceous period
A set of 11 abstracts and short papers (extended abstracts) of presentations given during a meeting organized by the "Groupe Français du Crétacé", held on November 27-28, 2006 at the École des Mines de Paris. (...)
Tue, 15 May 2007 19:00:00 GMT - Parsimony analysis of endemicity of enchodontoid fishes from the Cenomanian
Parsimony analysis of endemicity was applied to analyze the distribution of enchodontoid fishes occurring strictly in the Cenomanian. The analysis was carried out using the computer program PAUP* 4.0b10, based on a data matrix built with 17 taxa and 12 areas. The rooting was made on an hypothetical all-zero outgroup. (...)
Wed, 4 Apr 2007 15:00:00 GMT - Recent advances in palynology
A set of 11 abstracts and short papers (extended abstracts) of presentations given during a meeting organized by the NFSR Working Group, "Micropaléontologie végétale et Palynologie (MVP)", held May 24, 2006 at the University of Liège, Belgium. (...)
Thu, 22 Mar 2007 19:00:00 GMT - Environmental changes during marl-limestone formation: evidence from the Gargasian (Middle Aptian) of La Marcouline Quarry (Cassis, SE France)
Limestone-marl alternations are usually interpreted to reflect cyclic paleoenvironmental fluctuations linked to Milankovitch-scale climate variations. However, the impact of diagenesis on lithological differentiation can be overprinted on the primary signal. (...)
Tue, 27 Feb 2007 15:00:00 GMT - Nouvelles études micropaléontologiques sur le stratotype de la limite Campanien-Maastrichtien à Tercis (SO France) : les gilianelles (microproblematica) extraites par acétolyse
New micropalaeontological studies on the stratotype of the Campanian-Maastrichtian boundary at Tercis (SW France): the gilianelles (microproblematica) extracted through acetolysis. (...)
Thu, 14 Dec 2006 15:00:00 GMT - Les algues vertes (phylum Viridiplantae), sont-elles vieilles de deux milliards d'années ?
L'ouvrage présenté ici a pour base un différend qui oppose l'auteur à Andrew Knoll, qui situe l'apparition des algues vertes vers 750 Ma. Bernard Teyssèdre analyse ce probléme par les méthodes qu'il préconisait dans "La vie invisible" combinant à la palèontologie descriptive traditionnelle, les analyses ultrastructurales et biochimiques et confrontant ces résultats avec ceux de la phylogénie moléculaire. Manié avec discernement et compétence, cet outil ne permet certes pas d'établir une taxinomie exacte, mais d'écarter les taxinomies erronées basées sur des convergences et de déterminer la succession des points nodaux dans l'évolution d'une lignée. (...)
Tue, 26 Sep 2006 15:00:00 GMT - Schmidtites celatus (Obolida, Brachiopoda) from the "Obolus sands" (Upper Cambrian - Lower Ordovician) of Estonia
Large collections of the brachiopod obolid Schmidtites celatus have been gathered from Upper Cambrian-Lower Ordovician strata in four northern Estonian localities. The morphological features and the taxonomic characters of the genus and of the single species representing it are re-described and illustrated. (...)
Thu, 21 Sep 2006 15:00:00 GMT - Are the green algae (phylum Viridiplantae) two billion years old?
In his book, Life on a young planet, A.H. Knoll states that the first documented fossils of green algae date back 750 Ma. However, according to B. Teyssèdre's book, La vie invisible, they are much older. Using a method which combines paleontology and molecular phylogeny, this paper is an inquiry into the Precambrian fossils of some "acritarchs" and of a primitive clade of green algae, the Pyramimonadales. (...)
Tue, 19 Sep 2006 15:00:00 GMT - Illustrated glossary of terms used in foraminiferal research
An illustrated glossary of terms used in the analysis of the shells of recent and fossil foraminifera supplemented by a rigorous selection of terms that facilitate an understanding of their biology and their use in ecology and biostratigraphy. The glossary includes some 650 entries illustrated by 83 - often composite - figures many of which are stereographs or 3D models. A taxonomic index lists the 140 taxa illustrated.
Fri, 8 Sep 2006 15:00:00 GMT - Photo-Atlas of living Dasycladales
Dasycladales, from whichever point of view they are observed, biological or paleontological, never lack in surprises for their elegant structural simplicity is associated with an extraordinary morphological plasticity. This is why their study is so exciting and compelling for those who have a regard for these algae. (...)Berger, Sigrid
Mon, 4 Sep 2006 15:00:00 GMT - The Deshayesitidae Stoyanov, 1949 (Ammonoidea) of the Aptian historical stratotype region at Cassis-La Bédoule (SE France)
One of the significant results of the multidisciplinary investigations carried out during recent years in the Lower Aptian historical stratotype of the Cassis-La Bédoule region (South-Eastern France) was a proposal to update the local Upper Barremian/Lower Aptian ammonite biozonation in order to be more consistent with the standard Mediterranean zonal subdivisions. (...)
Thu, 11 May 2006 16:00:00 GMT
