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GEOREF RECORD

Lower to Middle Cambrian of the southern Canadian Rockies

Paul A. Johnston, Christopher J. Collom and Patricio Desjardins
Lower to Middle Cambrian of the southern Canadian Rockies (in Geologic field trips of the Canadian Rockies; 2017 meeting of the GSA Rocky Mountain Section, Jean C. C. Hsieh (prefacer))
Field Guide (Geological Society of America) (January 2017) 48: 71-121

Abstract

Lower to Middle Cambrian strata, well exposed in imbricated westward-dipping thrust sheets of the southern Canadian Rockies, host a range of geologic features from famous fossil lagerstatten to economically important ore deposits. This paper describes six localities in the Front and Central ranges west of Calgary that record tectonic, sedimentologic, and biologic events during deposition of the lower to mid-Sauk Megasequence. At the Mount Yamnuska and Castle Mountain viewpoints, Middle Cambrian platformal carbonate sections are well exposed. These were preceded by thick, siliciclastic-dominated, shallow-marine deposits of the Gog Group, which form a dramatic geologic backdrop to Lake Louise. Farther west, a platform-to-basin facies transition is recorded in the vicinity of Field, British Columbia. Pb-Zn mineralization and dolomitization are evident near or at this facies transition at the Kicking Horse Mine in Yoho National Park, and on Fossil Ridge as seen from the Emerald Lake viewpoint. A hike to the famous Trilobite Beds of Mount Stephen offers opportunity for first-hand examination of the Burgess Shale biota and associated unusual mineralogic and geologic features including anomalously Mg-rich mudstone, carbonate mounds, and apparent syndepositional faulting, dilational cracks, brine seeps, and mud volcanism.


ISSN: 2333-0937
EISSN: 2333-0945
Serial Title: Field Guide (Geological Society of America)
Serial Volume: 48
Title: Lower to Middle Cambrian of the southern Canadian Rockies
Title: Geologic field trips of the Canadian Rockies; 2017 meeting of the GSA Rocky Mountain Section
Author(s): Johnston, Paul A.Collom, Christopher J.Desjardins, Patricio
Author(s): Hsieh, Jean C. C.prefacer
Affiliation: Mount Royal University, Department of Earth and Environmental Sciences, Calgary, AB, Canada
Pages: 71-121
Published: 201701
Text Language: English
Publisher: Geological Society of America, Boulder, CO, United States
ISBN: 9780813756486
References: 129
Accession Number: 2018-013097
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., 1 table, geol. sketch maps
N51°00'00" - N52°00'00", W116°45'00" - W116°00'00"
Secondary Affiliation: MacCallum Geological Consulting, CAN, CanadaShell Exploration and Production Company, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 201803
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