California ; Continental margin ; Continentalslope ; Fauna ; Fish ; Fishing resources ; Natural resources ; Pacific Ocean;Pacific Region ; United States
High-resolution seismic stratigraphy has been applied to the interpretation of the stratigraphic architecture of the Late Pleistocene and Holocene successions on the continental shelf and upper slope of the Gulf of Castellammare, North-Western
continental shelf during the genesis of a fourth order depositional sequence. - (NF)
Synthèse des résultats des levés acoustiques et sismiques effectués au niveau du talus continental scotien afin d'étudier la stratigraphie quaternaire de cette région. L'interprétation sédimentologique des carottes montre que plus des 25 mètres
of the Svalbard archipelago because it is well reflected in the sediment cores along a continent-sea transect from the Isfjorden to the adjacent continental shelf and upper slope to the west. In addition, cores from the lower continentalslope and the adjacent
Zealand continentalslope and rise in water depths of 1688 to 2585 m. Subaerially erupted tephra from North Island within all three cores provide marker horizons to relate paleoceanographic changes with late Quaternary paleoclimatic records from north
Datation isotopique ; Fond sous-marin ; Mer de Chine Sud ; Niveau marin ; Oxygène 18 ; Pacifique ; Quaternaire marin ; Sédiment marin ; Sédimentologie ; Talus continental ; Variation climatique
Sediments of 13 piston cores from opposite continentalslopes of the South China Sea, off southern China and Sabah (northern Borneo), were analysed by sedimentological methods and dated by oxygen isotope stratigraphy. The resulting high
Publication of the offshore geological maps, scale 1:500 000, by the British Geological Survey has allowed estimation of the volume of Quaternary sediments on and at the margin of the continental shelf. The incomplete nature of the data sources
Modelling the Quaternary evolution of shore platforms and erosional continental shelves
Coastal dynamics ; Coastal environment ; Coastal erosion ; Continental shelf ; Glacial features ; Interglacial ; Intertidal zone ; Model ; Quaternary ; Sea level ; Shore platform
This paper discusses the use of a mathematical wave erosion model to study the effect of glacially induced sea level changes on the development of shore platforms and erosional continental shelves during the Quaternary. The model used two deep-water
wave sets, which were used to calculate breaker height and depth, and the force of the waves at the waterline, according to the width and bottom roughness of the surf zone and the gradient of the submarine slope. The model also incorporated an erosional
Arrecife ; Batimetría ; Cartografía ; Estados Unidos ; Flórida ; Fondo submarino ; Geofísica ; Geomorfología submarina ; Hábitat ; Pez ; Talud continental
in proximity to all of the mapped aggregation sites. In particular, three geomorphic characteristics were observed at most sites: a steep slope of the landward boundary of the upper slope terrace, an exposed outlier reef forming the seaward boundary
of the upper slope terrace, and at least one other exposed outlier reef on the upper slope terrace. The results suggest that the acoustic-mapping technologies used herein could be valuable when considering the placement of marine reserves.
Dynamique de versant ; Erosion sous-marine ; Fond sous-marin ; Marge continentale ; Mer Noire ; Talus continental
Les recherches sismiques effectuées sur le talus continental ancien et actuel de la mer Noire ont révélé des tranches de la couche sédimentaire liées à l'érosion sous-marine en nappe. L'épaisseur de la tranche atteint plusieurs kilomètres dans la
sédiment est considéré comme un liquide visqueux ou de plasticité visqueuse. Une équation est obtenue, qui définit les processus de l'érosion du talus continental par les sédiments.
Late Quaternary stratigraphy, chronology, and depositional processes on the slope of S.E. Baffin Island, detrital carbonate and Heinrich events : implications for onshore glacial history
Baffin Land ; C 14 dating ; Canada ; Carbonate rock ; Continentalslope ; Core sampling ; Foraminifera ; Geochronology ; Glacial features ; Inland ice ; Northwest Territories ; Quaternary ; Stratigraphy
Plus de 40 datations C 14, obtenues sur les foraminifères issus de carottes de 2,5 à 11 m en provenance du talus continental du SE de l'île de Baffin, ont servi à décrire les interactions entre l'inlandsis et l'océan à la limite NE de l'inlandsis
hémipalégique, laissant supposer que les moments où la glace a atteint le plateau continental ont été de courte durée.