GLACIATION OF BONAVISTA PENINSULA, NORTHEAST NEWFOUNDLAND

• Published in: The Canadian Geographer/Le Géographe canadien
• Main Author: BROOKES, IAN A.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1989
• Subjects: Ice cap; Newfoundland; Terre-Neuve
• Online Access: http://dx.doi.org/10.1111/j.1541-0064.1989.tb00882.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1541-0064.1989.tb00882.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1541-0064.1989.tb00882.x

Over Bonavista Peninsula, in northeast Newfoundland, ice‐flow directional indicators reveal two styles of glaciation. The inner part was glaciated by ice of the Newfoundland Ice Cap, flowing northeast but drawn down strongly into deep channels in Bonavista and Trinity bays and basally deflected northward by a line of hills bisecting the peninsula. The outer peninsula was almost completely glaciated by the contiguous, dynamically independent Bonavista Ice Divide, with coastward flow. Near the northeast extremity a low plateau, mantled with blockfield and bearing no obvious traces of glaciation, is flanked by a subdued end moraine. The moraine is argued to represent the local entire Wisconsinan glaciation limit. Evidence from soil development on the moraine and elevations of emerged post‐glacial shore features, as well as from comparison with glacial history in nearby areas, is used to argue a late Wisconsinan (pre‐12,000–13,000 BP) age for the later part of glaciation. Evidence of widespread till deposition far offshore can be harmonized with evidence of incomplete Wisconsinan glaciation onshore by postulating persistent discharge of inland ice through the deep, compound fiord basins that flank Bonavista and other east Newfoundland peninsulas Les indicateurs du passage des glaciers dans la péninsule de Bonavista située au nord‐est de Terre‐Neuve signalent l'oeuvre de deux styles de glaciation. La Calotte Glaciaire de Terre‐Neuve recouvrait tout I'intérieur de la Péninsule; se déplaçantvers le nord‐est, elle était forcee de suivre par les baies profondes de Bonavista et de Trinité, et détournée à sa base en direction du nord par les collines qui franchissent la péninsule du nordau sud. Pour sa part, I'extérieur de la péninsule gisait entièrement sous le Diviseur Glaciaire Bonavista, qui tout en étant contigu obéissait à une dynamique indépendante et s'écoulait en direction des côtes. A I'extrémité nord‐est de la pénin sule, sous un manteau de blocs rocheux, se trouve un bas plateau qui ne porte aucune trace de ...