995 resultados para Paris hippiques -- France -- Deauville (Calvados)


Relevância:

100.00% 100.00%

Publicador:

Resumo:

Référence bibliographique : Rol, 57714

Relevância:

100.00% 100.00%

Publicador:

Resumo:

The Toarcian Oceanic Anoxic Event (T-OAE) of the early Jurassic period involves one of the largest perturbations of the carbon cycle in the past 250 Ma, recorded by a pronounced negative carbon-isotope excursion (CIE). Numerous studies have focused on potential causes of the T-OAE and CIE, but are hampered by an uncertain timescale. Here we present high-resolution (~2 kyr) magnetic susceptibility (MS) measurements from the marine marls of the Sancerre-Couy drill-core, southern Paris Basin, spanning the entire Toarcian Stage. The MS variations document a rich series of sub-Milankovitch to Milankovitch frequencies (precession, obliquity and eccentricity) with the periodic g2-g5 (405 kyr) and quasi-periodic g4-g3 (~2.4 Myr Cenozoic mean periodicity) eccentricity terms being the most prominent. The MS-related g4-g3 variation reflects third-order eustatic sequences, and constrains the sequence stratigraphic framework of the Toarcian Stage. In addition, MS variations reveal a modulation of g2-g5 by g4-g3 eccentricity related cycles, suggesting that sea-level change was the main control on the deposition of the Toarcian Sancerre marls, in tune with the astro-climatic frequencies. The stable 405 kyr cyclicity constrains a minimum duration of the Toarcian Stage to ~8.3 Myr, and the well documented CIE, associated with the T-OAE, to ~300 to 500 kyr. The 405 kyr MS timescale calibrates the periodicity of the prominent high-frequency d13C cycles that occur in the decreasing part of the CIE to 30 to 34 kyr, consistent with the Toarcian obliquity period predicted for an Earth experiencing sustained tidal dissipation.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Représentations littéraires de la langue non standard chez Arthur Masson (Wallonie), Fonson & Wicheler (Bruxelles) et Pagnol (Marseille)

Relevância:

100.00% 100.00%

Publicador:

Resumo:

1919/11/15 (N1).

Relevância:

100.00% 100.00%

Publicador:

Resumo:

1919/12/01 (N2).

Relevância:

100.00% 100.00%

Publicador:

Resumo:

1919/12/01 (N2).

Relevância:

100.00% 100.00%

Publicador:

Resumo:

1926/11/01 (N165).

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Thèse réalisée en cotutelle avec l'Université Pierre et Marie Curie, Paris VI, France

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Réalisé en cotutelle, sous la direction du Pr. Bernold Hasenknopf, à l'Institut Parisien de Chimie Moléculaire, Université Pierre et Marie Curie (Paris VI, France) et dans le cadre de l'Ecole Doctorale "Physique et Chimie des Matériaux" - Spécialité Chimie Inorganique (ED397).

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Cette thèse de doctorat a été réalisée en cotutelle internationale entre l'Université de Montréal (Canada) et l'Université Sorbonne Nouvelle Paris 3 (France).

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)