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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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  • . The transgressive marine sediments onlap and overlie a 2700-yr-old middle Iron Age (Phoenician) tomb, which was built on a dark clay layer, containing a middle Bronze IIB (3750 yr B.P.) settlement. In post-Roman times the coastal zone at this site, both east
  • The recent discovery of a post-Roman-aged marine calcarenite terrace, at an altitude of 7 to 8 m at the ancient harbor of Akhziv, supports the hypothesis of oscillatory tectonic movements along the coastline of Israel during the late Holocene
  • 1986
  • Glacial sequence near McCall, Idaho: weathering rinds, soil development, morphology, and other relative-age criteria
  • The sequence of glacial deposits near McCall, Idaho, previously assigned to the Pinedale and Bull Lake glaciations, contains deposits of four different ages. These ages are defined by multiple relative-age criteria, including weathering rinds, soil
  • 1986
  • A comment on certain multivariate techniques used in the analysis of late Quaternary relative age data
  • 1986
  • Stratigraphy, evolution and age of Quaternary marine terraces in Morocco and Spain in Dating Mediterranean shorelines.
  • 1986
  • Age of rotational landslides in the Cypress Hills, Alberta - Saskatchewan
  • 1986
  • An inventory of last interglacial (sensu lato) age deposits from the Mediterranean Basin : a study of isoleucine epimerization and U-series dating in Dating Mediterranean shorelines.
  • 1986
  • Marine molluscan shells from para-type and other localities of the Holsteinian interglaciation were dated by Th/U and the election spin resonance method to more than 350,000 and 370,000 yr B.P., beyond the limit of Th/U dating. The high age estimate
  • is corroborated by a k/Ar age of 420,000 yr B.P. determined from volcanic ash.
  • 1986
  • The distribution of Th/ U ages in corals and the number of last interglacial high-sea stands
  • 1986
  • Estimating limiting age for pleistocene erosional surfaces in Central Montana by uranium-series dating of associated travertines
  • 1986
  • The characteristics of nonsorted patterned ground on two massifs are described and discussed with particular reference to age and mode of formation.
  • 1986
  • The dating of the 6 to m shoreline in southern Africa as early Pleistocene prompted a reassessment of evidence from archaeological cave sites on the south coast of the Cape Province which had suggested that this shoreline is of last interglacial age
  • . The successions in the caves at Klasies River Mouth and Die Kelders have been misinterpreted. In fact, they confirm a pre-last interglacial age for this feature. These sites, together with Herolds Bay Cave, indicate that in southern Africa the only last
  • 1986
  • Radiocarbon dating was applied to carbon bearing, charred eolian sediment from beneath the lava flows. Twenty of the more than 60 lava flows of the Crater of the Moon lava field have been dated| their ages range from about 15,000 to about 2000 yr
  • B.P. The ages permit assignment of the flows to eight distinct eruption periods with an average recurrence interval of about 2000 yr. The seven other latest Pleistocene-Holocene lava fields were emplaced in short eruptive bursts.
  • 1986
  • These soils, representing a chronosequence, were studied to investigate methods for describing the particle size distributions and to determine whether there are significant differences in the distributions for soil sola of different ages
  • 1986
  • to the age of the deposit : the youngest deposits having the highest velocities. The clast-sound velocity method can be applied to many unconsolidated bouldery deposits up to approximately one million years old.
  • 1986
  • Three generations of stromatolites are observed along paleolake margins, some 60 m above the modern water level of Lakes Natron and Magadi (southern Gregory Rift Valley). Ages of 240,000 or more| ca. 135,000| and 12,000 to 10,000 yr were obtained.
  • 1986
  • Temporal rating of geological processes has great importance for carstification processes in salt and gipsum areas. Two problems are discussed : determination of age by geological methods and prognosis of recent geological processes using
  • 1986
  • Groundwater from the Ojo Alamo and Nacimiento aquifers in the central San Juan Basin has yielded 14 C ages ranging from modern to 35,000 yr B.P. Isotopic analysis provided data which support a model of moderately cooler late Pleistocene climate
  • 1986
  • compound terrace surface of Sangamon (Eem) interglacial age (125 ka to 149 ka B.P.) exhibits nascent cone karst.
  • 1986
  • Deep chemical weathering of Neogene and early Pleistocene age occurs extensively in northeast Scotland. Saprolite mineralogy indicates development under temperate environments yet, despite a moderate degree of alteration, depths of weathering
  • 1986