Glacial and Sea-Level History of Southwestern Cumberland Peninsula, Baffin Island, N.W.T., Canada

Southwestern Cumberland Peninsula has been glacierized at various times by eastward flowing Laurentide ice, by an expanded Penny Ice Cap, and by fiord and valley glaciers fed from cirques. Two major weathering zones (A and B) and a fivefold subdivision of the younger zone (A) are recognized. The zone boundaries are marked by end and lateral moraines, some of which are related to raised marine deltas. Radiocarbon dates and amino acid age estimates on fossils from these deltas and correlations with the stratigraphic record of northern Cumberland Peninsula allow establishment of a tentative absolute chronology. The oldest terrain is that glaciated before the last interglaciation. The last glaciation is subdivided locally into the Duval, Outer Usualuk and Ranger stades, named for the end and lateral moraines which mark their maximum extents. During the Duval Stade (ca. 100,000 to 60,000 yr BP), Laurentide ice filled the inner one-third of Cumberland Sound and ice from local sources filled Pangnirtung and Kingnait fiords. Relative sea level was 100 m above present at the ice mar