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Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA

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Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA; 2007; Article; Journal; Natural Hazards and Earth System Science; Coe, J. A.; Harp, E. L.

Summary

We examine rockfall susceptibility of folded strata in the Sevier fold-thrust belt exposed in American Fork Canyon in north-central Utah. Large-scale geologic mapping, talus production data, rock-mass-quality measurements, and historical rockfall data indicate that rockfall susceptibility is correlated with limb dip and curvature of the folded, cliff-forming Mississippian limestones. On fold limbs, rockfall susceptibility increases as dip increases. This relation is controlled by several factors, including an increase in adverse dip conditions and apertures of discontinuities, and shearing by flexural slip during folding that has reduced the friction angles of discontinuities by smoothing surface asperities. Susceptibility is greater [...]

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Type Scheme Key
local-index unknown 70032022
local-pk unknown 70032022
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.5194/nhess-7-1-2007
series unknown Natural Hazards and Earth System Sciences

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journalNatural Hazards and Earth System Sciences
parts
typevolume
value7
typeissue
value1
languageEnglish
citationTypeArticle

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