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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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  • Uranium-series age estimates and paleoclimatic significance of pleistocene tufas from the Lahontan Basin, California and Nevada
  • The AA. report data on the distribution of the isotopes of uranium and thorium in water and sediment from two drainage systems in the Lahontan Basin. These data are used to perform model calculations of ages of tufa samples from the Lahontan Basin
  • . The calculated ages are then used to construct a tentative lake-level chronology for both the Walker lake and Pyramid Lake subbasins.
  • 1988
  • Age of the Frenchman Valley and associated drift south of the Cypress Hills, Saskatchewan, Canada
  • 1988
  • Age and paleoclimatic implications of the Bet Shean travertines
  • 1988
  • Comments on late Pleistocene age of the type Temple Lake moraine, Wind River Range, Wyoming, U.S.A. by G. A. ZIELINSKI and P. T. DAVIS and reply
  • 1988
  • Comment on age of pre-neoglacial cirque moraines in the central north american cordillera , by P. T. DAVIS and G. OSBORN and reply
  • 1988
  • Stratigraphy, geochemistry, and thermoluminescence ages of lower Mississippi valley loess
  • 1988
  • Vozrast i evoljucija cernozemov. Age et évolution des chernozems
  • 1988
  • The paper discusses independent methods of direct determination of age of the Pacific deep-sea trenches. The methods of trench dating are based on a recognition of the classic triad : structure - age - genesis for trenches, which have the thrust
  • 1988
  • Uranium-series ages of corals and coexisting phosphate deposits on Pelsaert reef complex, Houtman-Abrolkos islands, western Australia
  • 1988
  • Soil depth-age relationship of landslides on deforested hillslopes, Taranaki, New Zealand
  • 1988
  • Ages de traits polliniques et chronozonation du Tardiglaciaire final et de l'Holocène dans le Massif Central (France)
  • 1988
  • The Pleistocene glaciation of Tibet and the ouset of ice ages. An autocycle hypothesis in Tibet and High-Asia-Results of the Sino-German Point expeditions.
  • 1988
  • Anomalous radiocarbon ages from a Holocene detrital organic lens in Alaska and their implications for radiocarbon dating and paleoenvironmental reconstructions in the Artic
  • 1988
  • The crushing test on soil aggregates of irregular shape is calibrated against the Brazilian test for cylinders. Factors affecting the strength of soil aggregates are reviewed. These include water content, wetting and drying cycles, and age hardening
  • 1988
  • The results of this study support climatic control of pH buffering, and further suggest that differences in the climatic controls on pH buffering account for the difference in the pHA and pHB models. Moreover, soil parent material and soil age may
  • 1988
  • diamicton. The age of the features is not known but they probably formed during the later part of the last Midlandian Glaciation when the plateau was ice-free.
  • 1988
  • The AA. measured the offsets of six stream valleys, of 30 to 90 m, along the northwest - southeast trending, left lateral Haiyuan strike - slip fault, in north-central China. Minimum ages of these offsets were determined to estimate lower bounds
  • 1988
  • Stable isotope ratios for carbonates precipitated contemporaneously in the surface and bottom waters of Lake Zürich, together with AMS radiocarbon age determinations and lithostratigraphic data for a long core of the basinal sediments, provide
  • 1988
  • and eroded materials deposited prior to 0.25-0.29 MY. The second generation is related to terraced alluvial sediments| both deposits are strongly weathered to form a fersiallitic soil of Eemian age. This soil contains artifacts of the final Acheulean
  • 1988
  • Alpes du Sud ; Analyse pollinique ; Chronostratigraphie ; France ; Géographie physique ; Paléo-environnement ; Paléobiogéographie ; Paléoclimat ; Petit Age Glaciaire ; Quaternaire ; Solifluxion ; Versant
  • 1988