A new early Tremadoc (La1) graptolite faunule from western Newfoundland: its Australian affinity and biofacies relations

The biostratigraphic and depth-related ecostratigraphic significance of a newly discovered graptolite–phyllocarid faunule containing diminutive Rhabdinopora enigma and Anisograptus compactus of early to middle Tremadoc age from the Cooks Brook Formation (Humber Arm Supergroup) is described and discu...

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Bibliographic Details
Published in:Canadian Journal of Earth Sciences
Main Authors: Erdtmann, Bernd-D., Botsford, Jack W.
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1986
Subjects:
General Earth and Planetary Sciences
Norway
Cow Head
Green Point
Newfoundland
Northern Norway
Online Access:http://dx.doi.org/10.1139/e86-078
http://www.nrcresearchpress.com/doi/pdf/10.1139/e86-078
Description
Summary:The biostratigraphic and depth-related ecostratigraphic significance of a newly discovered graptolite–phyllocarid faunule containing diminutive Rhabdinopora enigma and Anisograptus compactus of early to middle Tremadoc age from the Cooks Brook Formation (Humber Arm Supergroup) is described and discussed. The faunule is identical with the La1 (Lancefieldian) graptolite–phyllocarid-bearing black shale "band" of Victoria, Australia, which was until now only known from two or three outcrops in Victoria and a single bed in northern Norway. This graptolite faunule probably represents a very distal shelf-marginal or open-ocean correlative of the Cap des Rosiers (Quebec) and Green Point (Cow Head Group, Newfoundland) late early Tremadoc anisograptid graptolite biofacies realm.

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