Abstrack Along the western part of the Burlington Peninsula and in the Grand Lake region east of Corner Brook, high-grade metamorphic rocks, collectively referred to in the Burlington Peninsula as the “Fleur de Lys Supergroup/’ separate the Cambrian-Ordovician platform sedimentary rocks of western Newfoundland from the volcanic rocks and clastic sedimentary rocks of the Central mobile belt. The metamorphic rocks have a complex structural history, and are characterized by the presence of garnet and, in the Burlington Peninsula, staurolite and eclogite. In the Burlington Peninsula the metamorphic rocks are present as two units referred to as the western and eastern divisions of the Fleur de Lys Supergroup. In the Corner Brook region the metamorphic rocks include rocks of the Mount Musgrave Formation and associated gneiss and schist units. On the east, the western division of the Fleur de Lys Supergroup and the gneissic rocks east of Corner Brook are in fault contact with low-grade metamorphosed volcanic and sedimentary rocks of the Baie Verte Group and Glover Formation, respectively. In the Burlington Peninsula, differences in the structural and metamorphic histories of the Fleur de Lys Supergroup and the Baie Verte Group suggest that the latter unit, if it is to be considered autochthonous, was deposited unconformably on the former. Correlation of the Baie Verte Group with the early Ordovician Snooks Arm Group of the Notre Dame Bay region therefore would suggest that the rocks of the Fleur de Lys Supergroup were metamorphosed before or during early Ordovician time. The presence in