On the Tremadoc-Arenig and Lower-Upper Tremadoc boundries in the Bell Island Group, Conception Bay, eastern Newfoundland
DOI :
https://doi.org/10.4138/1561Résumé
The Cambro-Ordovlcian ichnostratigraphic 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. R᳧SUM᳧ On applique au Groupe de Bell Island (Ordovicien, Bale de Conception) le modᳺle ichnostratigraphique dvelopp pour le Cambro-Ordoviclen d'Angleterre et du Pays de Galles et utilis avec succᳺs sur des squences contemptraines d'Europe du sudouest et de la rgion mditerranans. Ceci per-met de dfinir la frontlire entre le Trmadoc et l'Arenlg de fa᳹on plus exacte que lors d'tudes antrieures. On tente aussi de dfinir pour la premiᳺre fois la frontiᳺre sᳺparant le Trmadoc infrieur du Trmadoc suprieur ᳲ l'intrieur du Groupe de Bell Island. On suggᳺre que les deux llmites se trouvent dans la Formation de Beach, la premiᳺre tant situe ᳲ 1200 m dans la succession et la seconde ᳲ 1020 m. [Traduit par le journal]Téléchargements
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