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.

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

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.

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.

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.

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.

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.

Process and discharge estimation in ephemeral channels, Canadian Rocky Mountains

1984 ◽  
Vol 21 (9) ◽  
pp. 1050-1060 ◽  
Author(s):  
Joseph R. Desloges ◽  
James S. Gardner
Keyword(s):  
Debris Flow ◽  
Rocky Mountains ◽  
Canadian Rocky Mountains ◽  
Alluvial Channels ◽  
Channel Processes ◽  
Cross Sectional ◽  
Ephemeral Channels ◽  
Multiple Process ◽  
Instantaneous Discharge ◽  
Discharge Estimation

Process determinations and discharge estimates are made for 10 steep alpine channels in the Front and Main ranges of the southern Canadian Rocky Mountains. The catchments, which range in size from 0.17 to 1.13 km2, are sufficiently small that their runoff patterns are dominantly ephemeral and are characterized by processes that include water floods, debris flows, and snow avalanches.Longitudinal and cross-sectional channel profiles demonstrate the importance of bedrock control and the influence of one or more dominant processes. Debris flow channels have been partially scoured by water floods, and avalanche and debris flow sediments are noted in modified alluvial channels. The distribution and sorting of sediments support the multiple-process origin of specific channels or channel reaches.The discrimination of channel processes is essential for estimates of channel discharge. Slope/area and competence methods employed in fluvially dominated reaches of the 10 channels yield maximum instantaneous discharge estimates of between 1.1 and 12.2 m3 s−1. These discharges are generally not representative of the potential volumes of water and sediment released from the channels because of augmentation by both debris flow and avalanche processes. The design of roads and railways traversing these channels requires consideration of a range of processes of varying magnitudes.

The Ink Pots—a group of karst springs in the Rocky Mountains near Banff, Alberta

1969 ◽  
Vol 6 (4) ◽  
pp. 545-554 ◽  
Author(s):  
R. O. van Everdingen
Keyword(s):  
Rocky Mountains ◽  
National Park ◽  
Fine Sand ◽  
Spring Water ◽  
Karst Springs ◽  
Short Contact Time ◽  
Banff National Park ◽  
Algae Growth ◽  
Chemical Character ◽  
The One

The Ink Pots are a group of springs in Banff National Park. The one feature that makes these springs of more than passing interest is the greenish milky appearance of two of the ponds in the group. This difference in appearance of the water cannot be explained by dissolved or suspended chemicals, or by algae growth. It can be explained by differences in flow velocity, which cause differential suspension of fine sand and silt. Temperature and chemical character of spring water from the Ink Pots indicate, respectively, shallow circulation and a relatively short 'contact' time.

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