inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (301 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Crust of oceanic affinity in Iceland
  • Evidence for subsidence of at least 2km during crustal formation and the absence of an increase in minor intrusion density with depth in the lower 2km are the major results of the field study of a 3-km vertical section of Icelandic crust.
  • The Caledonian-Appalachian Iapetus Ocean in Evolution of the Earth's crust.
  • Ere primaire ; Géographie physique ; Iapetus, océan ; Tectonique de plaques ; Tectonique globale
  • L'histoire de la Terre écrite au fond des océans
  • Antarctica ; Earth crust ; Geology ; Global tectonics ; Mantle ; Ocean ; Oceanic crust ; Sea floor ; Subduction
  • Antarctique ; Croûte océanique ; Croûte terrestre ; Fond sous-marin ; Géologie ; Manteau terrestre ; Noyau terrestre ; Océan ; Subduction ; Tectonique globale ; Terres australes
  • Essai de reconstitution de l'évolution de la Terre à partir de l'étude du fond des océans des Terres australes. - (EM)
  • Glass rich basaltic sand and gravel within the oceanic crust at 220N. Scientific party of the Deep Sea Drilling Project, Leg46
  • New gravitational evidence for the subsurface extent of oceanic crust in North-Central Newfoundland
  • Continental-ocean boundary along the western sector of the South Scotia Ridge
  • Antarctica ; Bathymetry ; Fault ; Marine seismic prospection ; Model ; Oceanic ridge ; Plate tectonics ; Sea floor
  • was built using reflection seismic and sea-floor bathymetry. The model covers the boundary between the oceanic crust of the Scotia Sea and the continental crust of the South Scotia Ridge, where the orientation of the SSR structure changes from SW-NE to W-E
  • . Most of the active faults are located within the continental crust, however, deformation locally involves the oceanic crust and appears connected to the orientation and geometry of the fault system which defines the continent-ocean boundary. - (NF)
  • Sampling and observation of oceanic mantle and crust on Gorringe Bank
  • The nature of Archaean crust in the Canadian Shield in Evolution of the Earth's crust.
  • L'océan atlantique
  • Atlantic Ocean ; Geology ; Island ; Oceanic crust ; Tectonics ; Volcanism
  • L'A. étudie la croûte océanique de l'Atlantique et ses sédiments d'origine volcanique. Il s'intéresse ainsi aux îles volcaniques de l'océan atlantique : Islande, Canaries, Açores et les îles du Cap Vert.
  • Some neglected considerations in the valuation of marine minerals with special reference to cobalt crusts in Marine resource economics.
  • Cobalt ; Coût de production ; Géographie humaine ; Industrie extractive ; Métal ; Nodule polymétallique ; Océan ; Ressource naturelle
  • Continental crust ; Continental margin ; Fracture ; Geophysics ; Global tectonics ; Lineament ; Model ; Ocean ; Orogeny ; Paleogeography
  • Continent ; Croûte continentale ; Cycle ; Fracture ; Géophysique ; Linéament ; Marge continentale ; Modèle ; Mégacycle ; Océan ; Orogenèse ; Paléogéographie ; Pangée ; Tectonique des plaques ; Tectonique globale ; Téthys
  • is introduced : the eastward displacement of the Pacific basin relative to the Earth's crust. New connotations are also introduced : Pangaea is used for all continent crust, past and present, Tethys and Iapetus are taken as synonymous with the Pacific
  • Division et caractères morphométriques du fond de l'océan
  • Geomorphometry ; Geophysics ; Oceanic crust ; Sea floor;Ocean floor ; Submarine geology
  • Après un exposé méthodologique, les AA. étudient statistiquement les caractéristiques du relief sous-marin, puis de la surface de la croûte océanique. Ils terminent en retraçant l'origine des divisions actuelles de l'océan. - (FC)
  • Arctic Ocean;Arctic Region ; Earth crust ; Geophysics ; Mathematical model ; Model
  • Geophysics ; Global tectonics ; North Pacific Ocean ; Oceanic crust ; Ophiolite ; Pacific Ocean;Pacific Region ; Rock
  • Infiltration through three contrasting biological soil crusts in patterned landscapes in the Negev, Israel
  • The AA. examine the role of soil crusts in infiltration processes in 3 contrasting environments in the Northern, Central, and Central-Western Negev. The 3 crust types are : a dune sand supporting an almost continuous thin cyanobacterial and moss
  • crust, a predominantly physically (depositional) crusted loess soil sparsely colonised by cyanobacterial filaments, and a loamy hillslope soil supporting a well-developed crust colonised by cyanobacteria lichens, and some mosses. The AA. examine
  • the influence of crusts on water flow, and infer likely effects of crusts and their removal on ecological processes in landscapes characterised by a patchy distribution of resources.
  • Earth crust ; Ground survey ; Numerical analysis ; Pacific Ocean ; Remote sensing ; Sea level ; Sea of Japan ; Tide
  • Analyse numérique ; Croûte terrestre ; Déformation ; Laser ; Marée ; Mer du Japon ; Mesure de terrain ; Niveau marin ; Pacifique océan ; Télédétection
  • Laboratory experiments on crust development and rainsplash erosion of loess soils, China
  • Loess soil samples from Lishi, China, were tested in the laboratory. The objective was to examine the details of the time-dependent process of crust development. Data on splash erosion, crust strength and inference from micromorphological
  • observations are evaluated. In addition, the effect of crusting in subsequent rainsplash erosion and crust development will be examined as well.
  • Microbiotic crusts in the high equatorial Andes, and their influence on paramo soils
  • The first part of this paper will discuss the available information on microbiotic crusts, emphasizing their geomorphic and pedological aspects, as well as the sparse existing data for crusts in cold regions. The second part will describe in some
  • detail the microbiotic crusts found in the high equatorial Venezuelan Andes, as these seem to be the first instance of microbiotic crusts ever described for any high-altitude area in the world.
  • Crusted microtopography on badland slopes in southeast Spain
  • Four crust types have been recognised on badland slopes developed in Miocene marine marls of the Guadix-Baza depression. The pediment crust, is depositional in origine and is found on the surface of gently sloping pediments flanking the steep
  • badland slopes. The other three crust types, domed, tower and pinnacle developed in sequence on the steep gully side slopes. An integral part of the crust development sequence is the progressive colonisation of the surface by blue-green algae and lichen
  • Mesozoic complementary crust in the North Atlantic