Lithology, Trace Fossils, and Correlation of Precambrian-Cambrian Boundary Beds, Cassiar Mountains, North-Central British Columbia

Download or read book Lithology, Trace Fossils, and Correlation of Precambrian-Cambrian Boundary Beds, Cassiar Mountains, North-Central British Columbia written by William Harold Fritz and published by Geological Survey of Canada. This book was released on 1985 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trace fossils from the upper part of the Stelkuz formation (609m +) and from the overlying Boya Formation (400.5 m) permit atentative definition of the Precambrian-Cambrian boundary in theCassiar Mountains. The strata investigated are below the top ofthe Lower Cambrian Fallotaspis Zone, a level located 1.5 m abovethe upper contact of the Boya Formation. The Precambrian-Cambrian boundary is tentatively placed 592 m below this level ata disconformity within the Stelkuz Formation. Correlations withother boundary strata in the Canadian Cordillera suggest theoptimum area for further testing ichnofossil ranges is in theMackenzie Mountains. Intercontinental correlations are alsoattempted.