
New data on Tremadoc graptolites from Yukon, Canada
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The Tremadocian subzones of Staurograptus tenuis. Anisograptus richardsoni. Clonograptus aureus, and Adelagraptus anriquus are given full zonal status in northern Richardson Mountains. Bryograptus ramosus Broggor and a species of Dictyonema are described from the upper Tremadotc. The occurrence of B. ramosus in the C. aureus Zone supports a correlation with shales of 3a(beta symbol) age in Norway.
Palaeontology - Volume 18 Part 4 Pages 883-887Palaeontology - Volume 18 Part 4 Pages 883-887
Citations
JACKSON, D. E. 1975. New data on Tremadoc graptolites from Yukon, Canada. Palaeontology, 18, 4, 883–887.