Ice-sheet glaciation of the Puget lowland, Washington, during the Vashon Stade (Late Pleistocene)
Déglaciation ; Etats-Unis ; Glaciaire ; Glaciation de Fraser ; Géographie de l'Amérique ; Géologie régionale ; Inlandsis ; Isostasie ; Néotectonique ; Pacific States ; Pléistocène supérieur ; Puget Lowland ; Quaternaire zones moyennes ; Stade de
Reconstructed longitudinal profiles for the Puget lobe at its maximum extent, suggest that the ice sheet may have been in a nearequilibrium state at the glacial maximum. Progressive northward retreat from the terminal zone was accompanied
of the Puget lobe. Final destruction of the Puget lobe occurred when the ice retreated north of Admiralty Inlet. The sea entered the Puget lowland at this time, allowing the deposition of glacial-marine sediments which now occur as high as 50 m altitude
. These deposits suggest that a significant amount of postglacial isostatic and (or) tectonic deformation has occurred in the Puget lowland since deglaciation.
Cette étude montre que les tephra du Lac Tapps sont effectivement un marqueur stratigraphique régional pour le sud du Puget Lowland. Les dépôts de la première phase de la glaciation Salmon Springs peuvent être repérés par ces tephra. De plus ces
tephra fournissent un lien entre les sédiments du lobe Puget et ceux déposés par les glaciers alpins Olympic.
Stratigraphy and chronology of Quaternary deposits of the Puget Lowland and Olympic Mountains of Washington and the Cascade Mountains of Washington and Oregon in Quaternary glaciations in the Northern Hemisphere.
Cascade Range ; Datation ; Etats-Unis ; Géographie de l'Amérique ; Holocène ; Montagne ; Olympic Mountain ; Oregon ; Pléistocène ; Puget Lowland ; Quaternaire ; Quaternaire zones moyennes ; Stratigraphie ; Washington State
Gemmules of five species of freshwater sponge found in deposits at Cedar Mountain bog in the southeaster Puget Lowland were used to infer that during the late-glacial period the water was calcareous, was not deficient in SiO, was aerobic, and had
Radiocarbon age constraints on rates of advance and retreat of the Puget Lobe of the Cordilleran Ice Sheet during the last glaciation
Calibrated radiocarbon dates of organic matter below and above till of the last (Fraser) glaciation provide limiting ages that constrain the chronology and duration of the last advance-retreat cycle of the Puget Lobe in the central and southeastern
Puget Lowland. It seems that the average rate of retreat was about twice the rate of advance and was enhanced by rapid calving recession along flowline sectors where the glacier front crossed deep proglacial lakes.
A record of late Quaternary vegetation from Davis Lake, southern Puget Lowland, Washington
Davis Lake ; Etats-Unis ; Géographie de l'Amérique ; Holocène ; Pacific States ; Palynologie ; Paléobiogéographie ; Pléistocène supérieur ; Puget Lowland ; Quaternaire supérieur ; Quaternaire zones moyennes ; Végétation ; Washington State
Glaciation) (ca.25,000 17,000yr B.P.). The later parkland interval is dominated by Picea, Tsuga mertensiana, and Gramineae. It corresponds to the maximum ice advance in the Puget Lowland during the Vashon Stade (Fraser Glaciation) (ca.14,000yr B.P
of rapid climatic amelioration. In the early Holocene, the prolonged expansion of Pseudotsuga and Alnus woodland suggests dry, temperate conditions similar to those of present rainshadow sites in the Puget Lowland. More-mesic forests of Tsuga heterophylla
Late-glacial and early Holocene sea-level fluctuations in the central Puget Lowland, Washington, inferred from lake sediments
The purpose of this study is to use lake sediments, pollen, diatoms, and cladoceran remains to infer relative sea-level changes during the late Pleistocene and early Holocene in the central Puget Lowland. Such sea-level studies depend
Relict shorelines and ice flow patterns of the northern Puget Lowland from lidar data and digital terrain modelling
on the uplift pattern in the northern Puget Lowland. The AA. provide height information from lidar data of sea level indicators along a transect oriented N-S, roughly parallel to the direction of ice movement. In addition, they present geomorphic information
ATLAS ; BRITISH COLUMBIA ; CANADA ; CARTOGRAPHIE ; CARTOGRAPHIE THEMATIQUE ; EAU ; ETATS-UNIS ; GEORGIA, DETROIT ; Généralités sur la géographie ; INFORMATION ; PUGET SOUND ; SYMBOLISME ; UTILISATION DE L'EAU ; WASHINGTON
EXPERIMENTALE SUR L'UTILISATION DES EAUX ET LES ACTIVITES DE LA REGION: DETROIT DE GEORGIE ET BAIE DE PUGET. C'EST UN ATLAS EN UNE PAGE POUR LEQUEL L'A. EVOQUE LES PROBLEMES DE REPRESENTATION CONCEPTUELLE, DE LA COMPTABILITE ENTRE LES DONNEES ET LE SYMBOLISME
The Puget Sound Region. A second portfolio of topical maps.
; Production agricole ; Puget Sound region ; Transport ; Ville ; Washington
Le premier Atlas: The Puget Sound region: a portfolio of thematic computer maps. Occasional paper n3, 1974, abordait certains aspects démographiques établis à partir de l'exploitation des données du Recensement de la Population et de l'Habitat de
The AA. present new information on the time of the last glacial maximum on the west coast of British Columbia. They also compare the chronology of Late Wisconsin Glaciation in this area to that in the Puget Lowland and adjacent Strait of Georgia
Etude des avancées et des reculs des glaciations dans la Cordillère. Discussion et interprétation des datations radiocarbone des dépôts glacio-marins et fluvio-glaciaires des lobes de Puget et Juan, notamment.
Examen de la configuration spatiale des emplois dans la région de Puget Sound (Washington State) à une micro-échelle géographique. Les modèles de choix discret (logit multinomial) peuvent conduire à des situations d'incertitude à cette échelle. Le
Cartographie ; Comportement ; Décision ; Délibération ; Etats-Unis ; Internet ; Participation ; Puget Sound ; Simulation ; Système d'information géographique ; Système de transports ; Washington State
Les AA. évaluent la qualité et l'échelle des interactions au cours d'une expérience en ligne. Dans le cadre de projets d'amélioration des systèmes de transport dans la région du Puget Sound (Etat de Washington), ils utilisent le processus analytique