The Impact of Ecoregional Mobilization on Mountain Policies in the Swiss Alps and California’s SierraNevada
Alpes ; California ; Développement local ; Etats-Unis ; Mobilisation écorégionale ; Montagne ; Politique régionale ; Protection de la nature ; SierraNevada ; Suisse
Alps (The) ; California ; Local development ; Mountain ; Nature conservation ; Regional policy ; SierraNevada ; Switzerland ; United States of America
Dans le cas des développements des Alpes suisses et de la SierraNevada californienne au cours des 40 dernières années, le présent article expose la façon dont la mobilisation écorégionale a fait naître des tendances opposées dans les zones de
montagne, à savoir un passage du développement des infrastructures à la conservation de la nature dans les Alpes, et de la conservation de la nature au développement économique local dans la SierraNevada.
Crystalline rocks ; Fracture ; Granite ; Inselberg ; Micromorphology ; Regional geology ; Shear stress ; SierraNevada ; Spatial distribution ; Tectonics ; United States of America
The uplifted and westward tilted granitic batholith of the SierraNevada, comprises hundreds of Cretaceous intrusions, where sheeted bornhardts stand juxtaposed, and have been exposed to compressional stress during several time periods. Field
mapping north of Yosemite Valley identified 79 A-tents with a preferred orientation ENE-WSW suggesting the application of directionally applied stress. The AA. suggest that the A-tents in this part of the SierraNevada are related to intrinsic
California ; Climatic variation ; Fluvial erosion ; Geomorphology ; Isotope dating ; Landform evolution ; Mountain ; Palaeogeomorphology ; SierraNevada ; Tectonics ; Topography ; United States of America ; Vertical movement
The AA. dated caves in canyon walls, SierraNevada, using Al 26/Be 10 dating to document rates of river incision into bedrock, a primary means by which landscapes respond to tectonic forcing. They also measured nuclide concentrations in bare bedrock
surfaces to constrain erosion rates of adjacent granitic uplands. By combining these techniques, they derive high-resolution records of erosion, relief production, and paleotopography in the SierraNevada over the past 5 Ma. These new records help to link
C 14 dating ; California ; Earthquake ; Fault ; Moraine ; Quaternary ; Seismicity ; SierraNevada ; Stratigraphy ; Thermoluminescence ; United States of America
Palynological evidence for early Holocene aridity in the southern SierraNevada, California
Analyse pollinique ; Balsam Meadow ; California ; Dynamique de la végétation ; Etats-Unis ; Géographie de l'Amérique ; Holocène ; Montagne ; Paléoclimatologie ; Quaternaire zones moyennes ; SierraNevada ; Végétation
Sediments of Balsam Meadow have produced a 11,000 yr pollen record from the southern SierraNevada of California. The Balsam Meadow diagram is divided into three zones (1) The Artemisia zone (11,000-7000 yr BP)| (2) the Pinus zone (7000-3000 yr BP
C 14 dating ; California ; Carbonate ; Geochemistry ; Geochronology ; Glaciation ; Lacustrine sediment ; Magnetic susceptibility ; Palaeo-environment ; Pleistocene ; Quaternary ; SierraNevada ; United States of America
The AA. compare proxy records of alpine glaciation obtained from sediment cores in the Owens and pyramid lake basins of California and Nevada in order to define the centennial- to millennial-scale glaciation history of the SierraNevada
Aerial photography ; California ; Glacier ; Moraine ; Palaeo-environment ; Photointerpretation ; Rock glacier ; SierraNevada ; Snow line ; Thermokarst ; United States
The AA. describe rock glaciers and Matthes-age (Little Ice Age) moraines in the SierraNevada, and discuss their formation, extent, and climatological significance. They conclude for the Sierra that most valley-floor rock glaciers (i.e., tongue
The geomorphology of some debris flows in the southern SierraNevada, California
California ; Coulée boueuse ; Dynamique de versant ; Etats-Unis ; Montagne ; Mouvement de masse ; Neige ; Précipitation ; Risque naturel ; SierraNevada
California ; Debris flow ; Mass movement ; Mountain ; Natural hazards ; Precipitation ; SierraNevada ; Slope dynamics ; Snow ; United States
for debris flows in the southern SierraNevada include intense rainfall, rain-on-snow storms, and seasonal melting of heavy snowpacks. Movement typically occurs at depths between 0.3 and 5 m below ground surface.
Okologische Standortstypen in der subalpinen und alpinen Stufe der SierraNevada (Spanien) (Types de sites écologiques dans les zones alpines et subalpines de la SierraNevada (Espagne))
Eau du sol ; Ecosystème ; Espagne ; Géo-écologie ; Géographie physique ; Microclimat ; SierraNevada ; Sol ; Végétation ; Zonation altitudinale
Soil development on Late Pleistocene moraines at Pine Creek, East-Central SierraNevada, California
California ; Chronoséquence ; Datation C 14 ; Etats-Unis ; Glaciaire ; Lithologie ; Moraine ; Pléistocène ; Propriétés du sol ; Pédogenèse ; Quaternaire ; SierraNevada ; Variation climatique ; Végétation
C 14 dating ; California ; Chronosequence ; Climatic variation ; Glacial features ; Lithology ; Moraine ; Pedogenesis ; Pleistocene ; Quaternary ; SierraNevada ; Soil properties ; United States of America ; Vegetation
Late Pleistocene moraines at Pine Creek in the east-central SierraNevada Range are differentiated into 3 separate relative-age groups using soil morphological properties, with increasing soil development on progressively older deposits. A soil
of the SierraNevada. 3 allocycles of tectonic origin were recognised across wich there is a clear evolution from debris flow to sheet flow dominated fans, in connection with a decrease in the volume of fines available in the source areas. The results help
California ; Channel geometry ; Dendrology ; Ecosystem ; Riparian vegetation ; River bed ; SierraNevada ; Stream ; Stream flow ; United States of America ; dendro-ecology
within the riparian zone, within the semi-arid setting of the California eastern SierraNevada. A related objective was to determine to what extent stream diversion influences flow-growth relationships by affecting factors such as vegetation density.
Climatologie ; Cryologie ; Ecoulement ; Etats-Unis ; Histoire de la géographie ; Mesure ; Neige ; Nevada ; Prévision
Climatology ; Forecast ; History of geography ; Measurement ; Nevada ; Runoff ; Snow ; United States of America
History of measuring snow in the SierraNevada of the western USA, the effort of a Nevada professor who became the world's leading cryologist (scientist of cold weather). - (DWG)
Island arc ; Nevada ; Palaeogeography ; Palaeozoic ; Petrography ; Pyroclastic ; Regional geology ; Stratigraphic correlation ; Stratigraphy ; Structural geomorphology ; United States of America ; Volcanic rock
pétrographiques et stratigraphiques avec les séquences permiennes volcaniques de la SierraNevada septentrionale. Ces observations suggèrent que les formations permiennes du Nevada occidental et de la SierraNevada septentrionale se sont développées dans un
Chronosequence ; Clay mineral ; Glacial features ; High mountain ; Micromorphology ; Pedogenesis ; Quaternary ; SierraNevada ; Soil properties ; Spain
and on pre-glacial surfaces, all of similar lithology. Twelve soils were studied in 4 sectors of the SierraNevada : Laguna Seca, Lanjarón Valley, Mulhacén Valley, and Corral del Veleta.