CGRG Bibliography of Canadian Geomorphology
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Author : Gardner, J.S.
Date : 1977
Title : High magnitude rockfall-rockslide frequency and geomorphic significance in the Highwood Pass area, Alberta
Publication : Great Plains-Rocky Mountain Geographical Journal
Issue : 6:
Page(s) : 228-238
Abstract
Rockfalls and rockslides of large dimensions occur periodically in high mountain areas. They are the products of intrinsic geological conditions and extrinsic factors such as temperature, groundwater fluctuations, and glacial unloading. This paper presents a description of large cliff fall deposits in the Highwood Pass area in Alberta. It is concluded that cliff falls involving 100 to 1 million cubic metres (120 to 1.2 million cubic yards) of material have occurred with a frequency of slightly less than once in a thousand years since deglaciation. It is postulated that cliff fall frequency was greater during an immediately after deglaciation. The features produced are hummocky deposits composed on angular rocks of variable size, some being greater than two metres in diameter. The deposits are no continuous with cliffs or free faces.
Bibliography of Canadian Geomorphology