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TitleLlangorse volcanic field, British Columbia
AuthorHarder, M; Russell, J K; Anderson, R G; Edwards, B R
SourceGeological Survey of Canada, Current Research (Online) no. 2003-A6, 2003, 10 pages,
PublisherNatural Resources Canada
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in the following publications
File formatpdf
ProvinceBritish Columbia
AreaAtlin; Llangorse Mountain; Chikoida Mountain
Lat/Long WENS-134.0000 -132.0000 60.0000 59.0000
Subjectsregional geology; igneous and metamorphic petrology; Neogene; igneous rocks; volcanic rocks; lavas; basalts; olivine; bedrock geology; petrography; Llangorse volcanic field; Cenozoic; Quaternary; Tertiary
Illustrationssketch maps; graphs; tables; photographs; cross-sections; photomicrographs
ProgramTargeted Geoscience Initiative (TGI-1), 2000-2003
Released2003 01 23
AbstractThe Llangorse volcanic field is located southeast of Atlin, British Columbia, and is part of the larger Atlin volcanic district of the Northern Cordilleran volcanic province. The Llangorse volcanic field comprises seven localities of Neogene to Quaternary volcanic rocks: Hirschfeld Creek-Line Lake, Mount Sanford, Llangorse Mountain (sites 1, 2, 3, and 4), and Chikoida Mountain. The compositions of lava from these centres include olivine nephelinite, basanite, and alkali olivine basalt; all of the Llangorse Mountain sites are basanite. During the summer of 2002, the Llangorse Mountain sites and Chikoida Mountain were mapped in detail as part of the Atlin Targeted Geoscience Initiative, and the results are described in this paper. These exposures of volcanic rocks represent erosional remnants of valley-filling lava flows. Furthermore, many of these volcanic rocks show features that suggest impoundment against or eruption under ice.