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Yoho National Park
Abstract The Walcott Quarry was discovered in 1909 by the Smithsonian Institute's Charles Doolittle Walcott (1850–1927). The Cambrian Burgess Shale (505 Ma, Miaolingian) crops out in the quarry and the lagerstätte is the nexus of ongoing vigorous debate about fossil preservation (including taphonomy and diagenesis), taxonomy, classification, phylogeny, and the origin of phyla and baupläne. Smithsonian Institute's field crews collected from 1909–24, and the quarry was subsequently expanded by Harvard University (1930), the Canadian Geological Survey (1966–67), and the Royal Ontario Museum (1992–2000). Approximately 250 000 fossils, including soft-bodied forms, have been collected, making the Walcott Quarry with exposures of the Middle Cambrian Burgess Shale, a significant geoheritage site and an important representation of the Cambrian Explosion.
Identification and significance of tephras encountered in a core from Mary Lake, Yoho National Park, British Columbia
How Old Is That Mountain? A Visitor’s Guide to the Geology of Banff and Yoho National Parks.: By Dr. Chris Yorath. Harbour Publishing, P.O. Box 219, Madeira Park, British Columbia V0N 2H0. Paperback, Color and black-and-white photos, diagrams and maps, 6″ × 9″, 143 pages. $24.95, revised edition 2006, ISBN 1–55017–390–1.
(a) Topography of the Opabin Glacier terminal moraine (Yoho National Park, ...
A. Location of study sites. B. Study sites in Yoho National Park. C. Study ...
The Burgess Shale paleocommunity with new insights from Marble Canyon, British Columbia
Multi-Segmented Arthropods from the Middle Cambrian of British Columbia (Canada)
Evidence for pre-Cenozoic extension in the eastern Main Ranges of the southern Canadian Rockies
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 lagerstätten 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.