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TitleEdiacaran remains from intertillite beds in northwestern Canada
AuthorHofmann, H J; Narbonne, G M; Aitken, J D
SourceGeology vol 18, no 12, 1990 p. 1199-1202,<1199:ERFIBI>2.3.CO;2
Alt SeriesGeological Survey of Canada, Contribution Series 41189
PublisherGeological Society of America
Mediapaper; on-line; digital
File formatpdf
ProvinceNorthwest Territories
NTS95J; 95K; 95L; 95M; 95N; 95O; 96B; 96C; 96D; 96E; 96F; 96G; 105I; 105J; 105K; 105N; 105O; 105P; 106A; 106B; 106C; 106F; 106G; 106H
Lat/Long WENS-141.0000 -50.0000 90.0000 41.7500
Lat/Long WENS-134.0000 -122.0000 66.0000 62.0000
Subjectsstratigraphy; sedimentology; fossils; turbidites; glaciation; glaciomarine deposits; tillites; diamictites; debris flows; sea level changes; Proterozoic; Precambrian
Illustrationsillustrations; location maps; stratigraphic columns; photographs
AbstractA turbidite sequence within the Twitya Formation (Windermere Supergroup) in the Mackenzie Mountains, northwestern Canada, has yielded an assemblage composed of simple centimetric annuli and discs, which are interpreted as biogenic and referred to Nimbia occlusa Fedonkin, Vendella? sp., and Irridinitus? sp. They occur below a glaciomarine diamictite about 2.5 km below the base of the Cambrian, and they may represent the oldest Ediacaran fossils now known. The find has implications for models that relate the evolution of the Ediacara fauna to the waning of the Varanger glaciation.

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