inscription
Portail d'information géographique

Résultats de la recherche (274 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Mountain ordering : a method for classifying mountains based on their morphometry
  • Classification ; Fractal geometry ; Geomorphometry ; Hokkaido ; Japan ; Methodology ; Mountain ; Relief
  • A new method for defining the extent of a mountain, mountain ordering, is proposed, and is used to examine the morphological characteristics of a set of ordered mountains in northern Japan. As an example of geomorphometry based on the method
  • of mountain ordering, mountain order and the number, area and height for mountains of each order were determined for these mountains.
  • 1999
  • The shapes of some mountain peaks in the Canadian Rockies
  • Canada ; Classification ; Cuesta ; Dynamique de versant ; Glaciaire ; Glissement de terrain ; Géomorphologie structurale ; Montagne ; Rocky Mountains
  • Canada ; Classification ; Cuesta ; Glacial features ; Landslide ; Mountain ; Rocky Mountains ; Slope dynamics ; Structural geomorphology
  • Different mountain shapes in sedimentary sequences in the Canadian Rockies were enhanced by glacial erosion and have been modified postglacially by gravity-driven slope processes. Slope modification by both glacial erosion and postglaciation
  • 1999
  • Mountain evolution and environmental changes of Huangshan (Yellow mountain), China
  • Anhui ; Cenozoic ; China ; Clay mineral ; Fault ; Glaciation ; Granite ; Mountain ; Palaeo-environment ; Palynology ; Pleistocene ; Remote sensing ; Tectonics
  • Formative ages of the Huangshan and its granite, process of mountain geomorphic evolution from the Eocene to Quaternary, environmental changes of Quaternary, formative origin of beautiful peaks and fascinating rocks are studied and the questionable
  • 1999
  • Movement of King's Throne rock glacier, Mount Rae area, Canadian Rocky Mountains
  • Avancée du glacier ; Canada ; Glacier rocheux ; Géodésie ; Montagne ; Rocky Mountains ; Zone froide
  • Canada ; Cold area ; Geodesy ; Glacier advance ; Mountain ; Rock glacier ; Rocky Mountains
  • 1999
  • Peaks of identity in Colorado's San Juan Mountains
  • Colorado ; Cultural identity ; Landscape ; Leisure ; Mountain ; Semiotics of space ; United States of America
  • As certain mountains such as the San Juan Mountains in southwestern Colorado are imbued with meaning, they become peaks of identity, symbolic landscapes associated with community and cultural ideals. For communities near the San Juans
  • 1999
  • Sustainable land management in marginal mountain areas of the Himalayan region
  • Afforestation ; Agricultural production ; Agriculture ; Asia ; Farming system ; Food security ; Himalaya ; Land management ; Mountain ; Nepal
  • There is little arable land in the hills and mountains of the Himalayan region, where small, marginal farmers try to eke out a living. A new thinking advocates research in niche based sustainable production systems on marginal lands as part
  • of the effort to provide food security and sustainable livehoods for such marginal farmers. The International Centre for Integrated Mountains Development's (ICIMOD) afforestation strategies for degraded marginal areas are discussed, with reference to Sikkim
  • 1999
  • Paleoindian occupation of the White Mountains, New Hampshire
  • Late Quaternary history of the White Mountains, New Hampshire and adjacent southeastern Québec
  • Archaeology ; Archeological site ; Lithology ; Mountain ; New England ; Palaeo-environment ; Prehistory ; Quaternary ; United States of America
  • Etude de l'occupation paléoindienne dans les White Mountains, au New Hampshire. Description de 7 sites paléoindiens et de leurs assemblages d'artefacts. La clé d'interprétation de ces sites est l'identification des sources lithiques des Paléoindiens
  • . Le déplacement des matériaux lithiques à partir des White Mountains ou vers ces dernières permet d'avoir une certaine idée des déplacements et des contacts interrégionaux. La durée et l'extension de l'occupation paléoindienne dans les White Mountains
  • 1999
  • The role of preglacial relief in the development of mountain glaciation in the Sudetes, with the special reference to the Karkonosze Mountains
  • Central Europe ; Cirque ; Czech Republic ; Europe ; Glacial valley ; Glaciation ; Mountain ; Pleistocene ; Poland ; Quaternary ; Snow line ; Sudety ; Topography
  • The pattern and magnitude of the Pleistocene glaciation in the Sudetes is clearly controlled by the pre-existing, preglacial topography. The simultaneous occurrence of 3 factors is considered necessary for a mountain glaciation to develop
  • 1999
  • Late-Quaternary history of the alpine flora of the New Hampshire White Mountains
  • Late Quaternary history of the White Mountains, New Hampshire and adjacent southeastern Québec
  • Lateglacial ; Mountain ; New England ; Palaeo-ecology ; Palaeobotany ; Palynology ; Pollen diagram ; Quaternary ; Stratigraphy ; United States of America
  • Reconstitution de l'histoire de la flore alpine des White Mountains du New Hampshire à partir des études polliniques et des macrofossiles de la région des lakes of the Clouds, (Mont Washington). Comparaison de ces résultats avec le pollen et les
  • à la perte de certaines espèces de plantes dans la zone alpine des White Mountains.
  • 1999
  • Altitudinal zonation ; Andes ; Ecuador ; Mountain
  • Review of why a bronze plaque in honor of Alexander von Humboldt was affixed to the north wall of the stone pyramid for Simón Bolívar on the Andean mountain Chimborazo. There von Humboldt developed his ideas on the altitudinal arrangements
  • of natural and human life and their ordely change in elevation with latitude. Article includes the trilingual text (English, Spanish, Quechua) of the plaque. Plaque ceremony was concluding highlight of the III International symposium on sustainable mountain
  • 1999
  • Dating recent alluvial sediments in the Wicklow Mountains
  • Modern floodplain sediments in the Wicklow Mountains display a stratigraphy and sedimentology that contrasts them with earlier Holocene alluvium. This paper presents the results of a C 14 dating programme the objects of which were to date : a) more
  • definitively their commencement throughout the Wicklow Mountains, and b) their internal stratigraphies with a view to establishing a flood chronology. Although the results show that the immediate research aims cannot be achieved using C 14 dating they have lead
  • 1999
  • Design principles from traditional mountain irrigation systems (Bisses) in the valais, Switzerland
  • Irrigation ; Irrigation system ; Mountain ; Rill wash ; Switzerland ; Traditional agriculture ; Valais
  • and remained relatively stable up to the end of the 19th century. Paper describes 20th century changes, the long-term sustainability of bisses, their relationship with other mountain irrigation systems, and irrigation planning. - (SLD)
  • 1999
  • Observations on deforestation and alpine turf destruction in the Central Wutai Mountains, Shanxi Province, China
  • China ; Deforestation ; Holocene ; Land use ; Mountain ; Pastureland ; Shanxi ; Soil erosion
  • Wutai Shan, a Buddhist pilgrimage site since the 5th century, has a long history of extensive deforestation and intensive land use. By the end of the 19th century, the mountains had become widely deforested. Radiocarbon dates on wood and charcoal
  • 1999
  • The morphologic structure of step-pools in mountain streams
  • California ; Channel geometry ; Discharge ; Fluvial dynamics ; Grain size distribution ; Longitudinal section ; Model ; Mountain ; River bed ; Stream ; United States of America
  • The purpose of this paper is to report a field-based investigation on the geometric structure of step-pools in the Santa Monica Mountain streams. The step-pool morphology is evaluated empirically in light of variations in a downstream direction
  • 1999
  • Relict periglacial slope deposits in the Hex River Mountains, South Africa : observations and palaeoenvironmental implications
  • Cape Province ; Grain size distribution ; Lateglacial ; Mountain ; Palaeo-environment ; Periglacial features ; Slope deposit ; South Africa
  • The openwork block deposits in the Western Cape Mountains may have a variety of origins. However, some summit deposits appear to be periglacial blockfields and blockstreams and, as such, are probably the most widespread manifestation of cold Late
  • 1999
  • Volcanic ejecta as soil forming factor on carbonate relieves of the Partenio Mountain (Campanian Apennines)
  • Appennino ; Campania ; Geomorphology ; Italy ; Mountain ; Pedogenesis ; Pyroclastic ; Volcanic soil ; Volcanism
  • Volcanic ejecta largely contributed to landscape building also very far from volcanic areas, providing substratum for soil genesis. The AA. studied the role of pyroclastics as soil forming factor on the carbonate relieves in the Partenio Mountain
  • 1999
  • Poverty, land care, and sustainable livelihoods in hillside and mountain regions
  • Environmental degradation ; Hill ; Living conditions ; Living standard ; Mountain ; Natural resources ; Poverty ; Resource management
  • as well as of improved land care methods. Author calls for the restoration of local control over hillside and mountain resources and for the use of traditional knowledge in the crafting of development activities. - (SLD)
  • 1999
  • Carpathian Mountains ; Geomorphogenesis ; Mountain ; Regional geology ; Romania
  • 1999
  • Problems of glaciation of the High Tatra Mountains - JOSEPH PARTSCH synthesis in the light of current knowledge
  • Dating ; Deglaciation ; Glaciation ; Moraine ; Mountain ; Palaeogeography ; Palynology ; Pleistocene ; Poland ; Pollen diagram ; Quaternary ; Snow line ; Tatra Mountains
  • Deglaciation landforms are identified in 2 main valleys of the Polish High Tatra Mountains. Their character and distribution is parallelized with lacustrine sediments and deposits filling the dead-ice depression. Absolute dating and palynological
  • 1999
  • Coarse sand accumulations in granite mountains : the case-studies of the Serra do Gerês and Serra da Estrela (Portugal)
  • Grain size distribution ; Granite ; Mountain ; Portugal ; Sand ; Sedimentology ; Water erosion ; Weathering ; Wind erosion ; Wind speed
  • After the characterisation of the coarse sand accumulations in both mountains, their sedimentological properties are analysed and the aeolian and water activity in the two mountain ranges is compared. From this study it is evident that aeolian
  • 1999