Magnetites from a new unidentified tephra source, Banff National Park, Alberta

1979 ◽  
Vol 16 (6) ◽  
pp. 1294-1297 ◽  
Author(s):  
G. R. Brewster ◽  
R. L. Barnett
Keyword(s):  
Titanium Oxide ◽  
National Parks ◽  
Electron Microprobe ◽  
Rocky Mountains ◽  
National Park ◽  
Volcanic Ash ◽  
Canadian Rocky Mountains ◽  
Banff National Park

Electron microprobe examination of glass-encased magnetites present within surficial volcanic ash deposits located in Banff and Jasper National Parks revealed five distinct magnetite populations. Three of the magnetite populations represented the Mazama, St. Helens Y, and Bridge River volcanic units previously identified in this area of the Canadian Rocky Mountains. The remaining two magnetite groups are characterized by glass-encased magnetites which have titanium oxide concentrations of 11.59 and 10.33%, values considerably higher than those characteristic of either Mazama, St. Helens Y, or Bridge River volcanic units. The high-titanium magnetites are of unknown provenance, and although the section provided no means for dating these volcanic groups, their distribution within the section suggests that they are older than Bridge River, and one group may predate Mazama.

Forest fire's influence on yellow hedysarum habitat and its use by grizzly bears in Banff National Park, Alberta

1999 ◽  
Vol 77 (10) ◽  
pp. 1513-1520 ◽  
Author(s):  
David Hamer
Keyword(s):  
Forest Fire ◽  
Rocky Mountains ◽  
National Park ◽  
Ursus Arctos ◽  
Fibre Content ◽  
Grizzly Bears ◽  
Canadian Rocky Mountains ◽  
Prescribed Burns ◽  
Banff National Park ◽  
Root Quality

Hedysarum (Hedysarum spp.) roots are a primary food of grizzly bears (Ursus arctos) in the Front Ranges of the Canadian Rocky Mountains. I studied the effects of recent forest fire on yellow hedysarum (H. sulphurescens) habitat by comparing root density, mass, fibre content, ease of digging, and use by grizzly bears in and adjacent to two prescribed burns that were conducted in Banff National Park, Alberta, in 1986 (Cascade Valley) and 1990 (Panther Valley). Digging was 12-14% easier in burned than in forested habitat. In the Cascade burn, yellow hedysarum roots were significantly more abundant and heavier than in the adjacent forest. This burn was intensively dug by grizzly bears between 1995 and 1997, but no diggings were found in the adjacent forest. In the Panther burn, no significant differences in root quality or mass were found. Bears dug few roots in the burn and did not dig in the adjacent forest. Their use of these two burns demonstrates prescribed fire's potential to create important yellow hedysarum digging habitat for grizzly bears in Banff National Park.

scholarly journals Dendroglaciological investigations at Hilda Creek rock glacier, Banff National Park, Canadian Rocky Mountains

2002 ◽  
Vol 53 (3) ◽  
pp. 365-371 ◽  
Author(s):  
Rae Carter ◽  
Sean LeRoy ◽  
Trisalyn Nelson ◽  
Colin P. Laroque ◽  
Dan J. Smith
Keyword(s):  
Tree Ring ◽  
Rocky Mountains ◽  
National Park ◽  
Ground Surface ◽  
Canadian Rocky Mountains ◽  
Rock Glacier ◽  
Tree Ring Chronology ◽  
Cross Sectional ◽  
Engelmann Spruce ◽  
Banff National Park

Abstract Dendroglaciological techniques are used to provide evidence of historical rock glacier activity at Hilda Creek rock glacier in the Canadian Rockies. The research focuses on the sedimentary apron of the outermost morainal deposit, where excavations in 1997 uncovered six buried tree boles that had been pushed over and entombed by distally spilled debris. Cross-sectional samples cross- dated with a local Engelmann spruce tree-ring chronology were shown to have been killed sometime after 1856. Based on the extent of the excavation, the data indicate that Hilda Creek rock glacier has continued to advance along the present ground surface at a rate exceeding 1 cm/year.

Evidence for a Neoglacial advance of the Boundary Glacier, Banff National Park, Alberta

1985 ◽  
Vol 22 (11) ◽  
pp. 1753-1755 ◽  
Author(s):  
James S. Gardner ◽  
Norman K. Jones
Keyword(s):  
Rocky Mountains ◽  
National Park ◽  
Direct Evidence ◽  
Canadian Rocky Mountains ◽  
Radiocarbon Dates ◽  
Banff National Park

Direct evidence for an early Neoglacial advance in the Canadian Rocky Mountains is presented. Radiocarbon dates from buried peat and tree remains at Boundary Glacier suggest limiting dates for this advance of between 3800 and 4200 years BP. These data from Boundary Glacier are consistent with previously published dates for the onset of the Neoglacial and an early Neoglacial advance.

Dendrogeomorphological assessment of movement at hilda rock glacier, banff national park, canadian rocky mountains

2004 ◽  
Vol 86 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Taylor Bachrach ◽  
Kaj Jakobsen ◽  
Jacquie Kinney ◽  
Peter Nishimura ◽  
Alberto Reyes ◽  
...  
Keyword(s):  
Rocky Mountains ◽  
National Park ◽  
Canadian Rocky Mountains ◽  
Rock Glacier ◽  
Banff National Park

scholarly journals Characteristics of the Bergschrund of an Avalanche-Cone Glacier in the Canadian Rocky Mountains

1983 ◽  
Vol 29 (101) ◽  
pp. 55-69 ◽  
Author(s):  
Gerald Osborn
Keyword(s):  
Mass Transfer ◽  
Field Study ◽  
Rocky Mountains ◽  
Exploratory Study ◽  
National Park ◽  
Rotational Flow ◽  
Canadian Rocky Mountains ◽  
Void Space ◽  
Banff National Park ◽  
Shallow Part

AbstractField study of the bergschrund of a small avalanche-cone glacier at the base of Mt Chephren, in Banff National Park, has been carried out as part of a general exploratory study of glacier-head crevasses in the Canadian Rockies. The bergschrund consists of a wide, shallow, partly bedrock-floored gap, underneath which extends a nearly verticalRandkluft, and a small, offset, subsidiary crevasse (or crevasses). The following observations regarding the behavior of the bergschrund and ice adjacent to it are of particular interest: (1) topography of the subglacial bedrock is a control on the location of the main bergschrund and subsidiary crevasses, (2) the main bergschrund and subsidiary crevasse(s) are connected by subglacial gaps between bedrock and ice; the gaps are part of the “bergschrund system”, (3) snow/ice immediately down-glacier of the bergschrund system moves nearly vertically downward in response to rotational flow of the glacier, allowing the bergschrund components to keep the same location and size from year to year, (4) an independent accumulation, flow, and ablation system exists in the snow/ice up-glacier of the bergschrund system. (5) most of the void space in the bergschrund system is maintained through the winter, although the wide, shallow part of the main bergschrund fills up with snow, (6) some mass transfer of snow/ice occurs across the bergschrund system, (7) displacement across the bergschrund due to flow of the main glacier body results in significantly more snow being deposited each winter down-glacier of the bergschrund than up-glacier of it.

scholarly journals Characteristics of the Bergschrund of an Avalanche-Cone Glacier in the Canadian Rocky Mountains

1983 ◽  
Vol 29 (101) ◽  
pp. 55-69 ◽  
Author(s):  
Gerald Osborn
Keyword(s):  
Mass Transfer ◽  
Field Study ◽  
Rocky Mountains ◽  
Exploratory Study ◽  
National Park ◽  
Rotational Flow ◽  
Canadian Rocky Mountains ◽  
Void Space ◽  
Banff National Park ◽  
Shallow Part

AbstractField study of the bergschrund of a small avalanche-cone glacier at the base of Mt Chephren, in Banff National Park, has been carried out as part of a general exploratory study of glacier-head crevasses in the Canadian Rockies. The bergschrund consists of a wide, shallow, partly bedrock-floored gap, underneath which extends a nearly vertical Randkluft, and a small, offset, subsidiary crevasse (or crevasses). The following observations regarding the behavior of the bergschrund and ice adjacent to it are of particular interest: (1) topography of the subglacial bedrock is a control on the location of the main bergschrund and subsidiary crevasses, (2) the main bergschrund and subsidiary crevasse(s) are connected by subglacial gaps between bedrock and ice; the gaps are part of the “bergschrund system”, (3) snow/ice immediately down-glacier of the bergschrund system moves nearly vertically downward in response to rotational flow of the glacier, allowing the bergschrund components to keep the same location and size from year to year, (4) an independent accumulation, flow, and ablation system exists in the snow/ice up-glacier of the bergschrund system. (5) most of the void space in the bergschrund system is maintained through the winter, although the wide, shallow part of the main bergschrund fills up with snow, (6) some mass transfer of snow/ice occurs across the bergschrund system, (7) displacement across the bergschrund due to flow of the main glacier body results in significantly more snow being deposited each winter down-glacier of the bergschrund than up-glacier of it.

The Village Lake Louise Controversy: Ski Resort Planning, Civil Activism, and the Environmental Politics of Banff National Park, 1964–1979

2016 ◽  
Vol 47 (1) ◽  
pp. 90-110
Author(s):  
Qi Chen ◽  
Pearl Ann Reichwein
Keyword(s):  
Civil Society ◽  
Public Space ◽  
National Parks ◽  
National Park ◽  
Environmental Politics ◽  
Environmental Law ◽  
Public Consultation ◽  
Ski Resort ◽  
Banff National Park ◽  
The Village

A new ski resort village plan proposed for Lake Louise in Banff National Park triggered intense opposition at public hearings in 1972. Local proponents, backed by Imperial Oil, had entered into agreements to expand services at Lake Louise, which led to federal public consultations. We investigate Parks Canada’s early public consultation process and how it was institutionalized in federal policy making from 1964 to 1979. Public debate was significant and influenced political decisions in the Village Lake Louise controversy. The National and Provincial Parks Association of Canada, Bow Valley Naturalists, Environmental Law Association, mountain clubs, academics, and others advocated for protection as conservation lobbyists and the Government of Alberta also objected to the proposal, leading Minister Jean Chrétien to halt the plan. It was a win for citizens, environmentalists, and ecological integrity as Village Lake Louise debates became Canada’s town hall. Past environmental protection is relevant to civil society and public space in a moment of new approvals for massive ski hill industry expansions in national parks. Precedents in civil society and governance can inform understanding of public consultation and a new environmental politics.

Low wolverine (Gulo gulo) density in a national park complex of the Canadian Rocky Mountains

2020 ◽  
Vol 98 (5) ◽  
pp. 287-298
Author(s):  
M. Barrueto ◽  
M.A. Sawaya ◽  
A.P. Clevenger
Keyword(s):  
National Parks ◽  
Edge Effects ◽  
Rocky Mountains ◽  
Population Data ◽  
Home Ranges ◽  
Large Carnivores ◽  
Canadian Rocky Mountains ◽  
High Quality ◽  
Buffer Zones ◽  
Gulo Gulo

Large carnivores are sensitive to human-caused extirpation due to large home ranges, low population densities, and low reproductive rates. Protected areas help maintain populations by acting as sources, but human-caused mortality, habitat displacement, and edge effects occurring at protected area boundaries may reduce that function. The national parks Banff, Yoho, and Kootenay in the Canadian Rocky Mountains are refugia for large carnivores, including wolverines (Gulo gulo (Linnaeus, 1758)). Despite growing conservation concern, empirical baseline population data for wolverines remain scarce throughout their range, including most of Canada. We hypothesized (i) that in these national parks, wolverine density matched values expected for high-quality habitat, and (ii) that edge effects decreased density towards park boundaries. We conducted systematic non-invasive genetic sampling surveys covering >7000 km2 (2011 and 2013). Using spatial capture–recapture models, we estimated mean (±SE) female (1.5 ± 0.3 and 1.4 ± 0.3 wolverine/1000 km2), male (1.8 ± 0.4 and 1.5 ± 0.3 wolverine/1000 km2), and combined (3.3 ± 0.5 and 3.0 ± 0.4 wolverine/1000 km2) densities for 2011 and 2013, respectively. These estimates were lower than predictions based on density extrapolation from nearby high-quality habitat, and density decreased towards park boundaries. To benefit the population, we recommend creating buffer zones around parks that protect female habitat and prohibit harvest.

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