Reconnaissance surficial geology, Leith Peninsula, Northwest Territories, NTS 86-ETheatre Lobby
The Leith Peninsula map area is characterized by three distinct terrain types differentiated by surficial sediment cover and associated landforms. An extensive zone of generally low-lying bedrock-dominated terrain with little sediment cover dominates the eastern regions from Hottah Lake to McTavish Arm. The central and western regions below 280-290 m a.s.l. are covered by various glaciolacustrine sediments, including well developed raised beaches. The southwestern and central highlands rise from 300 m a.s.l. to 500 m a.s.l. and consist of different till units with glacial flutings, moraine ridges, and meltwater channels. In all terrain types, glaciofluvial eskers generally trend westward to northwestward. During the last glaciation, ice advanced westward, deviating slightly to west-northwestward toward McVicar Arm and McTavish Arm. Minor local variations in ice-flow direction are recorded by striations, crag-and-tail features, and fluted bedrock. Glacial Lake McConnell generally inundated the land in the region up to 290 m a.s.l., and up to 300 m a.s.l. to 305 m a.s.l. in some locations due to local ice configuration.