The stratigraphic significance of trace fossils from the Lower Paleozoic Baskahegan Lake Formation near Woodstock, west-central New Brunswick

Auteurs-es

  • R. K Pickerill Department of Geology, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick E3B 5A3, Canada
  • L. R. Fyffe New Brunswick Department of Natural Resources and Energy, Geological Surveys Branch, P.O. Box 6000, Fredericton, New Brunswick E3B 5HI, Canada

DOI :

https://doi.org/10.4138/2035

Résumé

The first indication of organic activity in Lower Paleozoic siliciclastic turbidites of the Miramichi Terrane has been found in a small quarry at Grafton Hill, near Woodstock, west-central New Brunswick. These previously unnamed turbidites are assigned to the Baskahegan Lake Formation defined in adjacent Maine. The Grafton Hill site has yielded the ichnotaxa Circulichnis montanus, Gordia? marina, Helminthopsis hieroglyphica, Planolites annularius and Planolites montanus. The presence of Circulichnus montanus supports previous circumstantial evidence that a considerable part of the Baskahegan Lake Formation is Early Ordovician in age and substantiates correlation with other quartz-rich peri-Gondwanan sequences elsewhere in the Appalachian-Caledonide Orogen. RÉSUMÉ La première indication d'une activité organique dans les turbidites silicoclastiques du Paléozolque inférieur du terrane de Miramichi a été observée dans une petite carriere de Grafton Hill, près de Woodstock, dans la région du centre ouest du Nouveau Brunswick. Ces turbidites non identifiés précéciemment sont attributée à la formation de Baskahegan Lake, circonscrite dans la région limitrophe du Maine. Le site de Grafton Hill contenait des traces fossilisées des espéces Circulichnis montanus, Gordia? marina, Helminthopsis hieroglyphica, Planolites annularius et Planolites montanu. La présence de l'espéce Circulichnus montanus corrobore des observations circonstancielles antéieures voulant qu'une partie considerable de la formation de Baskahegan Lake appartienne a l'Ordovicien inférieur et confirme la correlation existant avec d'autres séquences lithologiques fortement quartziques en bordure de la Gondwanie ailleurs dans l'orogenèse appalachienne et calédonienne. Traduit par la rédaction

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Publié-e

1999-10-01

Comment citer

Pickerill, R. K., & Fyffe, L. R. (1999). The stratigraphic significance of trace fossils from the Lower Paleozoic Baskahegan Lake Formation near Woodstock, west-central New Brunswick. Atlantic Geoscience, 35(3). https://doi.org/10.4138/2035

Numéro

Vol. 35 No. 3 (1999)

Rubrique

Articles

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