Postglacial palaeoenvironments of the upper Bow Valley, Banff National Park, Alberta, Canada

Reasoner, Mel A.; Huber, Ulrike Maria

doi:10.1016/s0277-3791(98)00034-1

Cited by 27 publications

(24 citation statements)

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“…4,000 14 C years B.P. (Beaudoin and King 1990;Reasoner and Huber 1999) and is evidenced by trees buried by Boundary Glacier 4,200 and 3,800 14 C years B.P. (Gardner and Jones 1985).…”

Section: Introductionmentioning

confidence: 97%

Dendroglaciological Evidence For A Neoglacial Advance Of the Saskatchewan Glacier, Banff National Park, Canadian Rocky Mountains

Wood

Smith

2004

Tree-Ring Research

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Seventeen glacially sheared stumps in growth position and abundant detrital wood fragments were exposed by stream avulsion at the terminus of the Saskatchewan Glacier in 1999. The stumps lay buried beneath the glacier and over 5 m of glacial sediment until historical recession and stream incision exposed the 225-to 262-year-old stand of subalpine fir, Englemann spruce and whitebark pine trees. Crossdating and construction of two radiocarbon-controlled floating tree-ring chronologies showed that all the subfossil stumps and boles exposed at this location were killed during a Neoglacial advance of the Saskatchewan Glacier 2,910 Ϯ 60 to 2,730 Ϯ 60 14 C years B.P. These findings support the Peyto Advance as a regional glaciological response to changing mass balance conditions.

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“…4,000 14 C years B.P. (Beaudoin and King 1990;Reasoner and Huber 1999) and is evidenced by trees buried by Boundary Glacier 4,200 and 3,800 14 C years B.P. (Gardner and Jones 1985).…”

Section: Introductionmentioning

confidence: 97%

Dendroglaciological Evidence For A Neoglacial Advance Of the Saskatchewan Glacier, Banff National Park, Canadian Rocky Mountains

Wood

Smith

2004

Tree-Ring Research

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“…In the mountains, essentially modern plant communities become established around 5000 BP (Luckman and Kearney, 1986;Reasoner and Huber, 1999) although there is evidence for a neoglacial advance starting approximately 3000 BP (Reasoner and Hickman, 1989). A similar pattern is recorded for the Foothills (MacDonald, 1989) while Sauchyn and Sauchyn (1991) document increases in forest cover around Harris Lake starting as early as 5000 BP.…”

Section: Vegetationmentioning

confidence: 60%

“…Pollen cores from mountain lakes indicate the presence of a sedge and grass community but one with sparse vegetation (Reasoner and Huber, 1999). At Crowfoot Lake, the pollen and macroscopic remains in Zone 1, dating from 11 330 to 10 100 BP, suggest a sparsely vegetated, unstable landscape associated with recently deglaciated terrain in the upper Bow Valley.…”

Section: Vegetationmentioning

confidence: 99%

“…In the cores from Crowfoot Lake, for example, the sandy clays deposited during the Crowfoot Advance are overlain by 18 cm of laminated gyttja with marl laminae in the lower 4 cm (Reasoner and Huber, 1999). According to these authors, the sudden change from clastic to organic sediments and the presence of a marl layer record the dramatic change in climate associated with the end of the Younger Dryas.…”

Section: Climatementioning

confidence: 99%

“…In Crowfoot Lake, for example, the interval beginning at 10 100 BP (Reasoner and Huber, 1999) represents the stabilization of the landscape and the appearance of abundant forest vegetation in the vicinity of the lake as indicated by the presence of macroscopic remains from spruce. This early Pinus-dominated forest included persistent areas of open vegetation.…”

Section: Vegetationmentioning

confidence: 99%

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River of Change: a Model for the Development of Terraces Along the Bow River, Alberta

Oetelaar

2004

gpq

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Researchers working in the Bow River valley have identified a minimum of four alluvial terraces, the upper two of which have been designated as paired terraces. Over the past 35 years, they have attempted to correlate these alluvial landforms and to generate models for the development of the terraces along the section of the Bow River between Calgary and the Rocky Mountains. In this study, Mazama ash and an early Holocene paleosol are used to correlate the terrace suites examined by previous researchers and to generate a model which accounts for the development of the upper two sets of paired terraces. These paired terraces reflect major episodes of aggradation and degradation that result from changes in independent variables such as climate and uplift. The initial episode of aggradation, dating from the late Pleistocene, is the result of paraglacial processes in a sparsely vegetated, yet saturated environment. Following a brief episode of degradation at the end of the Younger Dryas, the second episode of aggradation, dating from 9000 to 5000 BP, is caused by increased sediment load and lowered stream power during the Hypsithermal.Les chercheurs travaillant dans la vallée de la rivière Bow ont identifié au moins quatre terrasses alluviales, dont les deux supérieures ont été identifiées comme étant appariées. Au cours des 35 dernières années, ils ont essayé de corréler entre elles ces formes alluviales et d’élaborer des modèles appropriés à la formation des terrasses le long de la Bow River, entre Calgary et les Rocheuses. Dans la présente étude, les cendres de Mazama et un paléosol de l’Holocène inférieur ont servi à faire la corrélation entre les ensembles de terrasses étudiés précédemment et à élaborer un modèle pouvant expliquer la formation des deux ensembles supérieurs de terrasses appariées. Ces dernières résultent d’épisodes importants d’alluvionnement et de déblaiement qu’ont entraînées des modifications apportées à des phénomènes agissant de façon indépendante, comme le climat et le relèvement isostasique. Le premier épisode d’alluvionnement, survenu au Pléistocène supérieur, est le résultat de processus paraglaciaux agissant dans un milieu présentant une végétation clairsemée, bien que saturé. Après un court épisode de déblaiement à la fin du Dryas inférieur, le deuxième épisode d’alluvionnement (9000-5000 BP) est provoqué par une augmentation de la charge solide dans un cours d’eau de faible compétence, à l’Hypsithermal.Los estudios hechos en el valle del Bow River identifican por lo menos 4 terrazas fluviales, las dos terrazas superiores son consideradas terrazas apareadas. Durante los últimos 35 años se ha intentado relacionar estos relieves fluviales y generar modelos que permitan explicar la formación de terrazas a lo largo de la sección del Bow River entre Calgary y las Rocosas. En este estudio, las cenizas de Mazama y análisis de paleosuelos datando del Holoceno temprano han sido empleados para establecer una correlación de la serie de terrazas examinadas con anterioridad y así generar un modelo ...

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Holocene Vegetation Dynamics, Fire History, Lake Level and Climate Change in the Kootenay Valley, Southeastern British Columbia, Canada

Hallett

Hills

2006

J Paleolimnol

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Postglacial palaeoenvironments of the upper Bow Valley, Banff National Park, Alberta, Canada

Cited by 27 publications

References 0 publications

Dendroglaciological Evidence For A Neoglacial Advance Of the Saskatchewan Glacier, Banff National Park, Canadian Rocky Mountains

Dendroglaciological Evidence For A Neoglacial Advance Of the Saskatchewan Glacier, Banff National Park, Canadian Rocky Mountains

River of Change: a Model for the Development of Terraces Along the Bow River, Alberta

Holocene Vegetation Dynamics, Fire History, Lake Level and Climate Change in the Kootenay Valley, Southeastern British Columbia, Canada

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