Surficial geology, Lefroy Bay (southwest), Nunavut / [Authors: J.E. Campbell and I. McMartin]. : M183-1/152-2013E-PDF

"Diverse Quaternary sediments and depositional environments with notable landforms characterise the map area. Till blankets and till veneers are scattered through the area but are dominant above the marine limit. Sand and gravel deposits above the marine limit mainly occur in pro-glacial outwash trains, glaciofluvial aprons/deltas and icecontact landforms (eskers, kames) concentrated in valleys. The marine sequence includes, from the limit of marine incursion to the present-day coastline, thick deposits of deltaic sands and gravels, extensive areas of exposed and gullied clayey silts, marine offlap sands and silts, and sand and gravel littoral sediments. Sand veneers and patches of wave-washed tills are present below the marine limit. Extensive areas of exposed bedrock occur south of Committee Bay. Multiple ice-flow directions indicate a north to northwest flow that predates the dominant northeast then northward flows. Major end moraines (part of the Chantrey Moraine System) are present in the map area with divergent ice-flow directions on either side (northeast versus north). Marine limit elevation drops significantly from about 240 m a.s.l. north of the moraine (Giangioppi, M. et al. 2003) to about 170 m a.s.l. in the south map area suggesting a major stillstand at the Chantrey Moraines during deglaciation"--Abstract.

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