Papers by Marie-pierre Aubry
Stratigraphy, Dec 31, 2005
Special publication, 1996
Journal of South American Earth Sciences, Jun 1, 2023
Géologie méditerranéenne, 1987
Benson Richard H., El Bied Rakic K., Bonaduce G., Berggren William A., Aubry Marie-Pierre, Napole... more Benson Richard H., El Bied Rakic K., Bonaduce G., Berggren William A., Aubry Marie-Pierre, Napoleone G., Hodell D. The value of the Bou Regreg section as a boundary stratotype of the pliocene. In: Géologie Méditerranéenne. Tome 14, numéro 1, 1987. Xe colloque africain de micropaléontologie. A – Le Cenozoique. Rabat – Université Mohamed V – Maroc. 29 septembre-1er octobre 1987. p. 83
Travaux et Documents des Laboratoires de Géologie de Lyon, 1983
The classic Paleogene stages (Thanetian, Cuisian, Lutetian, Bartonian, Ludian and Stampian) defin... more The classic Paleogene stages (Thanetian, Cuisian, Lutetian, Bartonian, Ludian and Stampian) defined in the epicontinental deposits of the Anglo-Paris Basin(s) are placed within a standard biostratigraphic framework based on an analysis of their calcareous nannoplankton floras. Comparison and correlation is also made with Paleogene chronostratigraphic units elesewhere in Northwestern Europe (North Sea Basin in Denmark, northern Germany, Rhine Basin i. al.). Relatively precise biostratigraphic correlations can be made with some chronostratigraphic units (e. g. Lutetian), less precise with others (e. g. Ludian) depending upon the stratigraphie extent of fossiliferous sediments, and important hiatuses are recognized between certain chronostratigraphic units. Only the base of the Lutetian (late NP 14) and Bartonian (mid-NP 16) stages can be precisely determined in terms of calcareous nannoplankton zones. A comparison between the distribution of calcareous nannoplankton zones in the different parts of northwestern Europe reveals their unequal local development ; some being better developed (e.g. NP 8, NP 11, NP 12, NP 14-16, NP 23) than others (e. g. NP 9, NP 18, NP 21). Several zones (e. g. NP 10, NP 13, NP 21) appear to be unrepresented in northwest European epicontinental Paleogene sections. The irregular development of calcareous nannoplankton zones is interpreted to result from global relative changes in eustatic sea level. With the recent study of the paleomagnetic polarity history of the Paleogene of southern England and recent advances in magnetobiostratigraphic correlations in deep sea cores it is now possible to interpret the Paleogene history of the Anglo-Paris Basin (s) in a synoptic global framework in which the paleomagnetic stratigraphy provides the chronologic, and the eustatic variations the dynamic element. The redefinition of the boundaries of the standard Paleogene chronostratigraphic units of northwestern Europe within, rather than at the boundaries of (i. e at unconformities), the eustatically controlled depositional cycles would result in more precise correlations in terms of standard calcareous nannoplankton biostratigraphy.Les nannoflores calcaires conservées dans les formations épicontinentales paléogènes du Bassin anglo-parisien sont inventoriées et leur signification biostratigraphique est soigneusement analysée. Les étages définis dans le Bassin anglo-parisien (Thanétien, Cuisien, Lutétien, Bartonien, Ludien, Stampien) sont ainsi situés par rapport aux biozones à nannofossiles calcaires standard. Les corrélations sont plus ou moins précises selon l'étage considéré, et des hiatus sont reconnus entre certaines unités chronostratigraphiques. Seules, les bases du Lutétien (partie supérieure de la zone NP 14) et du Bartonien (partie supérieure de la zone NP 16) peuvent être situées en termes de biozones à nannofossiles calcaires. L'étude comparée de la répartition des biozones à nannofossiles calcaires dans l'ensemble de l'Europe du Nord-Ouest (Belgique, Allemagne du Nord, Danemark, Bassin anglo-parisien) révèle leur inégal développement, les unes étant très largement développées (NP 8, NP 11, NP 12, NP 14 à NP 16, NP 23) les autres étant mal représentées (NP 9, NP 17, NP 18, NP 19-20, NP 22) ou inexistantes (NP 10, NP 13, NP 21). Cette répartition apparaissant corrélable aux variations globales du niveau marin, l'histoire du Paléogène de l'Europe du Nord-Ouest est interprétée en fonction des variations eustatiques. La paléomagnétobiostratigraphie s'étant développée au cours des dernières années, et la partie inférieure des formations paléogènes d'Angleterre ayant fait l'objet de recherches paléomagnétostratigraphiques, l'histoire paléogène du Bassin anglo-parisien est replacée dans un cadre synthétique global où le paléomagnétisme constitue l'élément chronologique et les variations eustatiques l'élément dynamique.Aubry Marie-Pierre. Biostratigraphie du Paléogène épicontinental de l’Europe du Nord-Ouest. Étude fondée sur les nannofossiles calcaires. In: Documents des Laboratoires de Géologie, Lyon, n°89, 1983. Biostratigraphie du Paléogène épicontinental de l’Europe du Nord-Ouest. Étude fondée sur les nannofossiles calcaires. pp. 3-317
Palaeogeography, Palaeoclimatology, Palaeoecology, Aug 1, 2002
Geological Society of America Bulletin, Mar 1, 2003
An integrated biostratigraphic and stable isotope investigation was conducted on a high-latitude ... more An integrated biostratigraphic and stable isotope investigation was conducted on a high-latitude sequence across the Cretaceous/Paleogene (K/P) boundary recovered in Hole 750A in the southern Indian Ocean. The sequence consists of nannofossil chalk and is discontinuous across the boundary; missing is an estimated 0.3-m.y. late Maestrichtian and early Danian interval. Nonetheless, because calcareous nannofossil Zones NP1 and NP2 are well-developed, micropaleontological studies of the sequence have yielded a detailed record of Danian high-latitude microplankton evolution. In addition, stable carbon isotope analyses of planktonic and benthic foraminifer and bulk samples provide a record of late Maestrichtian and early Danian surface- and deep-water carbon isotope variations. Together, the carbon isotope and carbonate accumulation records serve as an index of regional marine net productivity across the boundary.Earliest Danian nannoplankton assemblages consisted mainly of persistent genera that were generally rare or absent in the Upper Cretaceous at Hole 750A. However, by 0.5-0.6 m.y. after the boundary, newly evolving Danian taxa became dominant. The turnover in nannofossil assemblages was accompanied by significant changes in rates of net productivity as gauged by carbon isotope distributions and carbonate accumulation rates. During the period dominated by persistent taxa, net productivity was extremely low, as reflected by the absence of vertical delta13C gradients and reduced carbonate accumulation rates. Later in the Danian, as new species evolved and flourished, vertical delta13C gradients reappeared and carbonate accumulation rates increased, signaling partial recovery of net productivity in this region. The absolute timing and magnitude of late Maestrichtian and early Danian biotic and geochemical changes in the southern Indian Ocean were similar to those recorded in other pelagic K/P boundary sequences from low- and mid-latitude Atlantic and Pacific sites, indicating that these events were ubiquitous.
GSA 2020 Connects Online, 2020
GSA Annual Meeting in Phoenix, Arizona, USA - 2019, 2019
GSA Annual Meeting in Phoenix, Arizona, USA - 2019, 2019
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Papers by Marie-pierre Aubry