Search results for "Ocean"
showing 10 items of 2919 documents
Centennial- to millennial-scale climate oscillations in the Central-Eastern Mediterranean between 20,000 and 70,000 years ago: evidence from a high-r…
2009
Dynamics at the Strait of Sicily and Mediterranean Sapropels
2012
Millennial-scale paleoenvironmental changes in the central Mediterranean during the Last Interglacial: comparison with European and Mediterranean rec…
2008
Astronomic forcing on the planktonic foraminifera assemblage in the Piacenzian Punta Piccola section (Southern Italy).
2006
Data for: Leukoma antiqua (Bivalvia) - a high-resolution marine paleoclimate archive for southern South America?
2018
Data for freshwater mixing line, Figure 2 Stable oxygen and carbon isotope data of shells, Td18O(shell) plus 1 sigma errors, instrumental SST, data for Figures 6+7 Temporal Alignment of oxygen isotope data (and temperatures reconstructed thereof), data for Figure 8
Eastern Mediterranean Transient-type events over the last five centuries
2013
Modalités évolutives du genre bullatimorphites (Ammonitina) au Bathonien-Callovien (Jurassique moyen) en Europe occidentale
1999
Abstract The genus Bullatimorphites, (macroconchs Bullatimorphites, Kheraiceras; microconchs Bomburites, Schwandorfia, Spbaeroptycbius, Treptoceras), is characterized by an ontogenesis with three morphologic phases: serpenticone, sphaerocone and ellipticone. Within the successive populations, the relative development of these morphologies allows the defined species to be placed in an evolutive and stratigraphic lineage. The history of the genus comprises five steps: 1) emergence (Early Middle Bathonian), 2) first gradual evolution (Middle-Upper Bathonian), 3) first morphological diversification (Uppermost Bathonian), 4) second gradual evolution, 5) second morphological diversification and e…
Marqueurs d'une structuration extensive jurassique en arrière de la marge nord-téthysienne (monts du Mâconnais, Bourgogne, France)
2000
Structural analysis of extensional faults in the Mâconnais Hills shows that low-intensity extensional phenomena occurred back from the passive margin of the Ligurian Tethys, the axis of which lay some 400 km southeast of the study area in Mid-Jurassic times. Storm-induced rip current directions and coral lens positions suggest that the palaeotopography was maintained by early faulting.
Early oysters and their supposed Permian ancestors
2005
The origin of oysters is a much debated palaeontological issue. Recent morphological studies indicate that oysters are characterized by a particular ribbing pattern, the so-called antimarginal ribs which are characterized by a proper morphogenetic pattern. Therefore antimarginal ribs can be used as a diagnostic character in phylogeny. The earliest recognized bivalve displaying diagnostic features of oysters (sinistral attachment to the substrate, typical hinge and ligament structure, and antimarginal ribs) is Ostracites cristadifformis Schlotheim, 1820 first appearing in the Anisian of Europe. This common species was later attributed to Enantiostreon and is here transferred to Umbrostrea. S…
Séries charbonneuses dans des séquences rétrogradantes: cas du bassin houiller paralique westphalien de Jérada (Maroc)
1998
Abstract Several orders of stacked genetic sequences in the Westphalian C of the Jerada Basin are defined from detailed sedimentological data. Eight coal seams were formed in this paralic basin as distal facies passed laterally into proximal facies in retrogradational stages. These stages are related to base level rises that curtailed detrital influx and induced the development of swamps and the preservation of organic matter below anoxic water levels. The base level variations are related to active faulting along the basin margins and to sea level changes in the Palaeo-Tethys.