Search results for "Universe"
showing 10 items of 2171 documents
Fresh Approaches to the Brick Production and Use in the Middle Ages
2012
International audience
Le Signal de Mont, un relief issu de l'érosion d'une chaîne de montagne.
2018
2 pages; National audience
Hydrochemical response of a polar glacier facing the recent climate changes (Austrelovenbre, Svalbard, 79°N)
2010
Relation eau de surface-eau souterraine dans un bassin-versant glaciaire, glacier Austrelovenbreen, Svalbard (79°N)
2010
Unravelling the PETM record in the Sparnacian facies of NW Europe: new data from the north-eastern Paris Basin
2010
The geological archives record "hyperthermic" crises, along with their consequences on the biota and physical environment. Among these, the PETM (Paleocene-Eocene Thermal Maximum) is considered as the closest analogue to the current climate crisis due to its global character and the speeds at which the CO2 rate and average temperatures increased. Some 55.8 Ma ago (Aubry et al., 2007), it affected the Earth for a period of almost 200,000 years; the terrestrial and marine paleoenvironments were marked by a negative δ13C anomaly (or Carbon Isotopic Excursion, CIE) coinciding with a negative δ18O anomaly indicative of a drastic temperature rise (+ 3 to + 8 °C). The causes envisaged to explain t…
The PETM record revealed by a new integrated high-resolution dinoflagellate cyst and geochemical data from the "Sparnacian" sediments in the Paris an…
2012
International audience; The Paris Basin represents an historical cradle of the Paleogene stratigraphy, where the Paleocene Epoch and the "Sparnacian Stage" have been erected (Schimper, 1874; Dollfus, 1880). As highlighted by Aubry et al. (2005), whereas the chronostratigraphic connotation of the Sparnacian Stage occurred to be controversial since its definition, modern studies of the Late Paleocene - Early Eocene interval have revealed that the so-called "Sparnacian" deposits encompass a remarkable and short (~170 kyr) episode in the Cenozoic history, the Paleocene-Eocene Thermal Maximum (PETM, ~55.8-55.6 Ma). However, due to a large development of diverse and laterally variable, predominan…
Le beau livre de la Terre - De la formation du système solaire à nos jours.
2014
420 pages; National audience; De la violence des premiers temps géologiques au foisonnement de la vie et à l’apparition de l’Homme, ce livre retrace 200 grandes étapes de l’histoire de la Terre.• Chaque événement est expliqué et illustré par une magnifique image.• Les plus grands savants sont présents : retrouvez Georges Cuvier, Charles Darwin ou encore Alfred Wegener !Plongez dans ce livre, lisez-le d’une traite ou dégustez-le au gré de vos envies, pour découvrir les mystères de notre planète.
Hydrochemical response of a polar glacier facing the recent climate changes (Austrelovenbre, Svalbard, 79°N)
2010
Unravelling the PETM record in the “Sparnacian” of NW Europe: new data from Sinceny, Paris Basin, France
2011
In order to decipher the PETM (Paleocene-Eocene Thermal Maximum) impact on the “Sparnacian” diversified and interconnected paleoenvironments of the Paris Basin, and to ensure correlation of the events and processes identified, a high resolution temporal framework is essential. Historically, the Paris and adjacent basins are the cradle of stratigraphy, where the notion of "Sparnacian" took shape (Dollfus 1880), pointing terrestrial to lagoonal deposits with particular facies and faunas, interstratified between two easily distinguishable Thanetian and Ypresian sandy marine formations. Since that time stratigraphy has evolved, and we refer now to the lithostratigraphy of Aubry et al. (2005). A…