Abstracts
Abstract
The Cambro-Ordovlcian lchnostratigraphic paradigm developed in England and Wales and successfully applied to coaval sequences in southwest Europe and the Mediterranean region is applied to the Ordoviclan Bell Island Group, Conception Bay, eastern Newfoundland. Its application enables a more accurate definition of the Tremadoc-Arenig boundary than previous studies have permitted and is the first attempt to define the Lower-Upper Tremadoc boundary within the Bell Island Group. It is suggested that both boundaries fall within the Beach Formation, the former at 1200 m within the succession and the latter at 1020 m.
RESUME
On applique au Croupe de Bell Island (Ordovlclen, Bale de Conception) lemodSle ichnostratigraphi-que developpE pour le Cambro-Ordoviclen d'Angleterre et du Pays de Galles et utilise* avec auccfts sur des sequences contempt) ralnes d'Europe du sudouest et de la region mediterraneans. Ceci per-met de dSflnir la frontlire entre le Tr&madoc et l'Arenlg de fagon plus exacte que lors d'ltudes anterieures. On tente aussi de dfiflnlr pour la premiftre fois la fronti&re sftparant le TrSmadoc inferleur du TrSmadoc sup&rieur ft l'interieur du Croupe de Bell'lsland. On suggSre que les deux llmites se trouvent dans la Formation de Beach, la premiere gtant situSe ft 1200 m dans la succession et la seconde ft 1020 m.
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