Structure, stability, and tsunami hazard associated with a rock slope in Knight Inlet, British Columbia
Rockfalls and rockslides during the past 12 000 years have deposited bouldery debris cones on the seafloor beneath massive rock slopes throughout the inner part of Knight Inlet. The 885 m high rock slope, located across from a former First Nations village destroyed in the late 1500s by a slide-induc...
Published in: | Natural Hazards and Earth System Sciences |
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Copernicus Publications
2015
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Online Access: | https://doi.org/10.5194/nhess-15-1425-2015 http://www.nat-hazards-earth-syst-sci.net/15/1425/2015/nhess-15-1425-2015.pdf https://doaj.org/article/0c9ff4f4a6774529980810fea82af658 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:0c9ff4f4a6774529980810fea82af658 2023-05-15T16:16:35+02:00 Structure, stability, and tsunami hazard associated with a rock slope in Knight Inlet, British Columbia D. P. van Zeyl D. Stead M. Sturzenegger B. D. Bornhold J. J. Clague 2015-06-01 https://doi.org/10.5194/nhess-15-1425-2015 http://www.nat-hazards-earth-syst-sci.net/15/1425/2015/nhess-15-1425-2015.pdf https://doaj.org/article/0c9ff4f4a6774529980810fea82af658 en eng Copernicus Publications 1561-8633 1684-9981 doi:10.5194/nhess-15-1425-2015 http://www.nat-hazards-earth-syst-sci.net/15/1425/2015/nhess-15-1425-2015.pdf https://doaj.org/article/0c9ff4f4a6774529980810fea82af658 undefined Natural Hazards and Earth System Sciences, Vol 15, Iss 6, Pp 1425-1436 (2015) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2015 fttriple https://doi.org/10.5194/nhess-15-1425-2015 2023-01-22T19:33:13Z Rockfalls and rockslides during the past 12 000 years have deposited bouldery debris cones on the seafloor beneath massive rock slopes throughout the inner part of Knight Inlet. The 885 m high rock slope, located across from a former First Nations village destroyed in the late 1500s by a slide-induced wave, exposes the contact between a Late Cretaceous dioritic pluton and metamorphic rocks of the Upper Triassic Karmutsen Formation. The pluton margin is strongly foliated parallel to primary and secondary fabrics in the metamorphic rocks, resulting in highly persistent brittle structures. Other important structures include a set of sheeting joints and highly persistent mafic dykes and faults. Stability analysis indicates that planar and wedge rock slope failures up to about 500 000 m3 in volume could occur. We suspect that failures of this size in this setting would have the potential to generate locally hazardous waves. As several similar rock slopes fronted by large submarine debris cones exist in the inner part of Knight Inlet, it is clear that tsunami hazards should be considered in coastal infrastructure development and land-use planning in this area. Article in Journal/Newspaper First Nations Unknown High Rock ENVELOPE(-111.452,-111.452,58.917,58.917) Wedge Rock ENVELOPE(-128.518,-128.518,52.610,52.610) Natural Hazards and Earth System Sciences 15 6 1425 1436 |
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language |
English |
topic |
geo envir |
spellingShingle |
geo envir D. P. van Zeyl D. Stead M. Sturzenegger B. D. Bornhold J. J. Clague Structure, stability, and tsunami hazard associated with a rock slope in Knight Inlet, British Columbia |
topic_facet |
geo envir |
description |
Rockfalls and rockslides during the past 12 000 years have deposited bouldery debris cones on the seafloor beneath massive rock slopes throughout the inner part of Knight Inlet. The 885 m high rock slope, located across from a former First Nations village destroyed in the late 1500s by a slide-induced wave, exposes the contact between a Late Cretaceous dioritic pluton and metamorphic rocks of the Upper Triassic Karmutsen Formation. The pluton margin is strongly foliated parallel to primary and secondary fabrics in the metamorphic rocks, resulting in highly persistent brittle structures. Other important structures include a set of sheeting joints and highly persistent mafic dykes and faults. Stability analysis indicates that planar and wedge rock slope failures up to about 500 000 m3 in volume could occur. We suspect that failures of this size in this setting would have the potential to generate locally hazardous waves. As several similar rock slopes fronted by large submarine debris cones exist in the inner part of Knight Inlet, it is clear that tsunami hazards should be considered in coastal infrastructure development and land-use planning in this area. |
format |
Article in Journal/Newspaper |
author |
D. P. van Zeyl D. Stead M. Sturzenegger B. D. Bornhold J. J. Clague |
author_facet |
D. P. van Zeyl D. Stead M. Sturzenegger B. D. Bornhold J. J. Clague |
author_sort |
D. P. van Zeyl |
title |
Structure, stability, and tsunami hazard associated with a rock slope in Knight Inlet, British Columbia |
title_short |
Structure, stability, and tsunami hazard associated with a rock slope in Knight Inlet, British Columbia |
title_full |
Structure, stability, and tsunami hazard associated with a rock slope in Knight Inlet, British Columbia |
title_fullStr |
Structure, stability, and tsunami hazard associated with a rock slope in Knight Inlet, British Columbia |
title_full_unstemmed |
Structure, stability, and tsunami hazard associated with a rock slope in Knight Inlet, British Columbia |
title_sort |
structure, stability, and tsunami hazard associated with a rock slope in knight inlet, british columbia |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/nhess-15-1425-2015 http://www.nat-hazards-earth-syst-sci.net/15/1425/2015/nhess-15-1425-2015.pdf https://doaj.org/article/0c9ff4f4a6774529980810fea82af658 |
long_lat |
ENVELOPE(-111.452,-111.452,58.917,58.917) ENVELOPE(-128.518,-128.518,52.610,52.610) |
geographic |
High Rock Wedge Rock |
geographic_facet |
High Rock Wedge Rock |
genre |
First Nations |
genre_facet |
First Nations |
op_source |
Natural Hazards and Earth System Sciences, Vol 15, Iss 6, Pp 1425-1436 (2015) |
op_relation |
1561-8633 1684-9981 doi:10.5194/nhess-15-1425-2015 http://www.nat-hazards-earth-syst-sci.net/15/1425/2015/nhess-15-1425-2015.pdf https://doaj.org/article/0c9ff4f4a6774529980810fea82af658 |
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undefined |
op_doi |
https://doi.org/10.5194/nhess-15-1425-2015 |
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Natural Hazards and Earth System Sciences |
container_volume |
15 |
container_issue |
6 |
container_start_page |
1425 |
op_container_end_page |
1436 |
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1766002443991121920 |