CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Eisbacher, G. H.
Date : 1971
Title : Natural slope failure, northeastern Skeena Mountains
Publication : Canadian Geotechnical Journal
Issue : 8(3):
Page(s) : 384-390
Abstract
Twenty-five rockslides in sedimentary strata of the Skeena Mountains in north-central British Columbia are concentrated along a distinct belt approximately 30 km wide. Four slides belong to a 'shallow' type, 21 to a 'deep' slide type. slopes oriented parallel to the structural trend and made up of heterogeneous conglomerate, sandstone, shale successions are more likely to fail than others. water, rock anisotropy, and permeability variations have profound influence on rock slope failure. These three parameters are evaluated in a qualitative way for the slopes in the northeastern skeena mountains. The presence of highly permeable conglomerate lenses and beds interlayered with shale afford a means of building up artesian heads in the toe of many slopes and causing these to fail either by slow progressive decrepitation or, more rarely, by sudden failure. The conglomerates in the area are generally poorly cemented and occasionally fractured; higher permeability is assumed in the conglomerates.
Bibliography of Canadian Geomorphology