inscription
Portail d'information géographique

Résultats de la recherche (25 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Macrofossiles et microfossiles
  • Microfossils and depositional environment of Late Dinantian carbonates at Heibaart (Northern Belgium)
  • The continental margin of Gondwana, principally in central western Argentina: Jurassic and Lower Cretaceous palynomorphs and calcareous microfossils in Gondwana Five. Selected papers and abstracts of papers.
  • Siliceous microfossils and mineral magnetic characteristics in a sediment core from Lake Manitoba, Canada : a remnant of glacial Lake Agassiz
  • Etude du contenu en microfossiles siliceux et en minéraux magnétiques d'une carotte de 14,2 m prélevée dans la partie méridionale du bassin du lac Manitoba; 14 nouvelles datations par accélérateur de particules AMS imposent un contrôle
  • Climatic implications of macro- and microfossil assemblages from Late Pleistocene deposits in Northern New Zealand
  • Stratigraphic and microfossil evidence for late Holocene tsunamis at Swantown marsh, Whidbey Island, Washington
  • Niveles marinos del Holoceno en el estuario de Bahia Blanca (Argentina). Isotopos estables y microfosiles calcareos como indicadores paleoambientales in Actas simposio oscilaciones del nivel del mar durante el ultimo hemiciclo deglacial en la
  • Analyse isotopique ; Antarctique ; Cénozoïque ; Erosion glaciaire ; Fluctuation du glacier ; Microfossile ; Oxygène 18 ; Paléoclimatologie ; Paléogéographie ; Roche volcanique
  • Hydrovolcanic deposits, interbedded tills and recycled microfossils, together with erosion anomalies in the Marie Byrd Land (MBL) landscape, each provide a portion of the record of glaciation and deglaciation events from late Oligocene
  • sediments are crucial in this regard because they assist greatly in the identification of particular microfossil assemblages that can be used to distinguish coastal sediments deposited by palaeotsunamis from storm surges and also from those sediments
  • Atlantique ; Carte ; Circulation océanique ; Cénozoïque ; Microfossile ; Océan Indien ; Paléobiogéographie ; Paléogéographie ; Paléontologie
  • This paper presents additional evidence on the source areas and transporting agents of freshwater microfossils in sediments of the equatorial Atlantic. This study confirms the validity of paleoclimatic research which inferred eolian transport
  • The distribution of radiolarian assemblages identified by Q-mode factor analysis of radiolarian microfossils in surface sediments from low latitudes in the Pacific Ocean reflects their associations with surface water masses. Downcore fluctuations
  • Chemical analyses: pH, exchangeable cations, carbon, iron, aluminium, phosphorous, oligo-elements and magnesium. Physical methods: granulometry, Atterberg limits, clay mineral analyses, soil colours and separation of heavy minerals and microfossils
  • aient porté des landes. Fossiles forestiers et microfossiles.
  • La reconstitution de la paléogéographie et de la dynamique de la végétation a été effectuée à partir de l'étude des sédiments du fond de lacs d'eau douce avec analyse de leur composition lithologique, avec étude des microfossiles de végétaux et de
  • sur le caractère changeant des eaux plus profondes du début de la Mer de Champlain à partir des résultats de l'étude des sédiments et des microfossiles.
  • Pollen and algae microfossils preserved in sediments from Pyramid Lake provide evidence for periods of persistent drought during the Holocene age. The timing and magnitude of droughts identified in the pollen record compares favorably
  • The AA. report new microfossil data and radiocarbon ages from Quadra Sand at Point Grey, Vancouver. These new data provide strong evidence for more than 100 m of glacio-isostatic depression of the crust at the periphery of the Cordilleran ice sheet
  • The AA. present a new stratigraphic (pollen and nonpollen microfossils and charcoal particle) sequence with 5 AMS dates, covering about the last 9000 yr, of a core collected from the Spanish northern meseta, in a region known as Tierra de Pinares
  • minerals, the claymineral composition and the organic walled microfossils have been determined. Interpretation of the results suggests an environment of marine tidal flats during the sedimentation of the Bassevelde Member, followed by a sedimentary break