Jurassic-Cretaceous rock units along the southern edge of the Wrangellia Terrane on Vancouver Island

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doi: 10.1139/e85-124
Authors:Rusmore, Margaret E.; Cowan, Darrel S.
Author Affiliations:Primary:
Univ. Wash., Dep. Geol. Sci., Seattle, WA, United States
Volume Title:Canadian Journal of Earth Sciences Revue Canadienne des Sciences de la Terre
Source:Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre, 22(8), p.1223-1232. Publisher: National Research Council of Canada, Ottawa, ON, Canada. ISSN: 0008-4077
Publication Date:1985
Note:In English with French summary. 37 refs.; illus. incl. geol. sketch maps
Summary:The Leech River unit, as previously mapped, comprises two separate units, each characterized by a different deformational and metamorphic history: the Leech River complex (s.s.) and the newly identified and named Pandora Peak unit. The Leech River complex consists of foliated metasandstone, phyllite and minor metabasalt of probable Jurassic-Cretaceous age. Multiple folding, transposition, and syn-kinematic greenschist- to amphibolite-facies metamorphism culminated about 40 m.y. ago. The Upper Jurassic-(?)Lower Cretaceous Pandora Peak unit was probably deposited in small basins on a continental margin. Local stratal disruption occurred before sediments were lithified. A static high-P, low-T metamorphism produced lawsonite-bearing assemblages in metaclastic rocks. [J.M.H.]
Subjects:Correlation; Cretaceous; Faults; High pressure; Jurassic; Lithostratigraphy; Low temperature; Mesozoic; Metamorphic rocks; Metamorphism; Metasedimentary rocks; Mineral assemblages; Movement; Plate tectonics; Pressure; Stratigraphy; Structural geology; Tectonics; Tectonophysics; Temperature; Terranes; Wrangellia; British Columbia; Canada; North America; Vancouver Island; Western Canada; Leech River Formation; Pandora Peak unit
Coordinates:N480000 N493000 W1230000 W1250000
Abstract Numbers:86M/2561
Record ID:1985083938
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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