00000nam 2200000za 4500 9.817622 CaOODSP 20230131161136 cr ||||||||||| 160512s2016||||onc|||||o f00| 0 eng d 978-0-660-05440-7 1701-4387 CaOODSP eng n-cn-bc M44-2016/2E-PDF Wilson, A. M. (Alexander M.) Geology of the Monmouth Creek volcanic complex, Garibaldi volcanic belt, British Columbia [electronic resource] / A. M. Wilson ... [et al.]. Ottawa : Natural Resources Canada, 2016. 13 p. : figures. Current research, 1701-4387 ; 2016-2 Includes bibliographical references. "Quaternary intermediate volcanic rocks of the Monmouth Creek volcanic complex, located west of Squamish, British Columbia, were mapped to determine their extent and origin. The deposits are distributed within a deep embayment in the granite wall of the Howe Sound, and have a present day thickness of about 200 m. They comprise a sequence of andesite lavas, domes, and lobes, and associated monolithological andesitic breccia units. Cogenetic, en echelon andesite dykes intrude the entire complex, and their erosional remnants outcrop as a series of steep-sided, enigmatic pinnacles and spires. On the basis of petrographic and geochemical criteria the authors identify two distinct magma types expressed as aphyric andesite and hornblende andesite. On the basis of field relationships and the properties of the volcanic deposits and their distributions, the Monmouth Creek volcanic complex is shown to have a glaciovolcanic origin. A model is presented for the emplacement of the volcanic deposit that indicates the presence of a major fjord-filling glacier, likely greater than 1 km thick and occupying Howe Sound to an elevation of about 800 m above present-day sea level at the time of eruption"--p. 1. gccst Igneous rocks gccst Metamorphic rocks gccst Geological maps. Geological Survey of Canada. Current research (Geological Survey of Canada) 1701-4387 ; 2016-2 (CaOODSP)9.506236 PDF 9.55 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M44-2016-2-eng.pdf