Preliminary Account of the Trilobite Biostratigraphy of the Survey Peak and Outram Formations (late Cambrian, Early Ordovician) at Wilcox Pass, Southern Canadian Rocky Mountains, Alberta
註釋 "A section through the Survey Peak and Outram formations at Wilcox Pass, Alberta is more accessible than the type section at Mount Wilson and has facilitated the detailed collecting of shelly fossils, particularly trilobites, which often show marked affinities with those of Utah and Nevada. The basal sitty member of the Survey Peak Formation yields evidence of the Saukia Zone, Carbinia apopsis Subzone, followed by a group of beds containing Apoplanias and Missisquoia, and then Zone A with Symphysurina. The Survey Peak Formation ranges upwards probably almost to the top of Zone F, although evidence for the latter is inconclusive. The Outram Formation probably begins just below the base of Zone G and extends upwards into Zone J, to which zone the basal Skoki Formation also belongs. Stratigraphic ranges of principal trilobite genera are given, and evidence is presented to demonstrate the presence of Zones A, B, D, E, G and J. Evidence of Zone F is inconclusive, while Zones G, H and I are probably represented by strata without macrofossils." -- 