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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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  • The changing geography of major causes of death among middle age white Americans, 1939-1981
  • Magnetic polarity stratigraphy of the Middle Pleistocene (Ensenadan) Tarija Formation of southern Bolivia
  • The Tarija Formation of southern Bolivia, which is well known for its classic vertebrate faunas, is of prime importance in understanding of the chronology of the Ensenadan Land Mammal Age. This formation consists of well-exposed and relatively
  • where aging hotels and summer houses are used for short vacation periods by the Mexican middle class. The visitor flow has modestly increased in recent years, but Tecolutla will never achieve the recreational importance of Acapulco. - (DWG)
  • Reconstruction of Little Ice Age events in the canadian Rocky Mountains
  • Canada ; Datation ; Dendrochronologie ; Glaciaire ; Géographie de l'Amérique ; Lichenométrie ; Montagne ; Moraine ; Petit Age Glaciaire ; Radiocarbone ; Rocky Mountains
  • Principales techniques utilisées pour la datation des moraines du Petit Age Glaciaire et reconstitution des phases d'avancée glaciaire sur 33 glaciers.
  • Aging of the population of Quebec is analysed with reference to the population of the North Eastern United States. A structure, different from the surrounding population is then identified for Quebec. Various types of evolution are also identified
  • for the period extending from 1930-31 to 1970-71, showing that aging is a complex phenomenon| in some cases, advanced aging is being replaced by a decrease in the percentage of aged persons. The phenomenon is then studied on a county basis. An analysis
  • of population aging according to the type of residence shows that rural non-farming population and small town population are more concerned with aging whereas rural farming population has the lowest percentage. Important variations are also observed between
  • Notes on the use of extractable iron and clay minerals for determination of soil age
  • Changes in soil morphologic properties assist in dating and correlating Quaternary deposits in the Rocky Mountains glacial sequence. Determinations of the ratio of acid oxalate to citrate-dithionite extractable Fe (Fe ratio) gives a trend with age
  • Fission-track age (400,000 yr) of the Rockland tephra, based on inclusion of zircon grains lacking fossil fission tracks
  • The AA. present new ages from fission-track analyses of zircons that indicate the age of the Rockland Tephra most likely is between 370,000 and 420,000 yr| stratigraphic and magnetostratigraphic data are compatible with this range.
  • Late deglaciation of the central Labrador coast and its implications for the age of glacial lakes Naskaupi and McLean and for prehistory
  • The AA. present evidence for the age of the marine limit of the central Labrador coast which suggests that deglaciation of that coast is considerably later than previously considered. Given these new estimates the ages of glacial lakes Naskaupi
  • The age and number of important fossil-producing late Pleistocene terraces in the Tunica Hills have recently become quite controversial. One hypothesis holds that only a single loess-mantled Farmdalian terrace flanks the streams in this area
  • . The other maintains that there are two terraces. The youngest is considered essentially Holocene in age while the older is Sangamon in age. Radiometric and stratigraphic evidence collected for this study indicates that there are two terraces. The youngest
  • is late Woodfordian to Holocene in age while the other is Farmdalian.
  • An Evaluation of preliminary age and sex data from: the 1970 Brazilian census
  • A new evaluation of United States census data on the extreme aged
  • As American suburbs support a higher percentage of old people, a need has arisen for support services for this age-group : home health care, assistance with home maintenance, adult day care and transportation. A case study of this aging-in-place
  • Age of the last major scabland flood of the Columbia Plateau in Eastern Washington
  • The effects of aging on the mobility of the low-income elderly: A case study
  • Accelerator radiocarbon date indicates mid-Holocene age for hickory nut from Indiana late-glacial sediments
  • Significance and ages of mid-wisconsinian organic deposits in southern Michigan
  • Spatial patterns of age-sex structures in Costa Rica: a study in demographic modernization
  • The impact of changes in pricing policy upon transit riders of varying ages in Chicago
  • The geographical analysis of a given population's age structure, in this case that of the Saguenay-Lac-Saint-Jean region, is a powerful inductive-deductive tool in the task of establishing man-space relationships. A regional descriptive factorial
  • model is obtained by braking down 16 age groups (eight feminine and eight masculine classes based on 1971 data) into four basis factors which were mapped by municipality. A systematic map synthesizes these four dimensions and shows that this regional age
  • ) age. It is considered to be Illinoian in age, but the evidence is tenuous. The till is correlated with the lower till of New England, and its presence supports the view that the New England upper and lower tills represent two glaciations. The pre
  • -Wisconsinan (lower) till in New England may correlate with older tills elsewhere in the northeastern United States and in southeastern Canada that are considered to be early Wisconsinan or older in age.