CGRG Bibliography of Canadian Geomorphology
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Author : Gallagher, J.
Date : 1989
Title : Glacial geomorphology and Late Quaternary chronology of Innrer Nachvak Fiord, Northern Labrador
Publication : Unpublished Masters thesis. Memorial University of Newfoundland. St. John's.
Issue :
Page(s) : 217 p
Abstract
Regional ice was predominant during the last stade, while Kogarsok Brook valley was the main source of local ice. Glacial stades of different relative age were detected through morphologic mapping of moraines, measurement of solum development, and observation of weathering characteristics. Piston cores were not deep enough to penetrate into late Pleistocene sedimentary, and therefore did not provide a correlation with terrestrially-identified glacial sediments. Raised shorelines in the inner fiord may be indicators of individual stages of glacial retreat. Beach segments were levelled and correlated into thirteen shorelines. Some of these were associated with moraines and submarine sills. At least three phases of glaciation were detected; the youngest Nachvak phase is correlated with the Late Wisconsin, and was the last regional glaciation. In the inner fiord, this phase is characterised by prominent moraines and numerous raised shorelines. Two inner fiord moraines may be associated with the Nachvak maximum. Moraine K2 indicates that the ice-sheet reached a minimum elevation of 180m aht, while moraine K1 suggests a maximum of about 220 m aht. A local ice tongue emanating from Kogarsok Brook appears to have coalesced with the regional ice-sheet at this time. If moraines M1 and M3 are of the same age as the Adams Lake phase in the outer fiord, they suggest that local ice activity at this time was more extensive than previously thought
Bibliography of Canadian Geomorphology