CGRG Bibliography of Canadian Geomorphology
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Author : Campbell, J.E.
Date : 2004.
Title : Peter Lake Domain Project: Quaternary investigations in the northwest Reindeer Lake area, (parts of NTS 64E/15 and /16).
Publication : Summary of Investigations 2003 Volume 2, Saskatchewan Geological Survey, Saskatchewan Industry and Resources, Miscellaneous Report
Issue : 2004-4.2.
Page(s) : CD-ROM, Paper A-5, 19 p.
Abstract
Quaternary geological investigations in the MacKenzie, Zengle and Reindeer lakes area involved surficial mapping at 1:50 000 scale, recording ice flow indicators, and a regional till sampling survey. The dominant ice flow direction was to the south-southwest (205 - 210 ), becoming more southwesterly (215 - 220 ) towards the southern boundary of the map area. Two older regional ice flow directions are oriented at ~188 (175 to 195 ) and 228 to 240 . Rare, faint striae sets trending 154 (2 sets) and 295 (1 set) were also recorded. Drift cover is variable. The Crane Island area, is dominated by bedrock (approximately 60 to 80 percent) mantled by less than 2 m of discontinuous drift cover. The present-day landscape is controlled by the bedrock topography with little geomorphic expression of the glacial deposits. Westward, the drift thickens and is more extensive, with less than 10 percent bedrock exposure. The landscape is more subdued there and reflects both glacial geomorphic features and bedrock topography. The dominant surficial sediments are till and organic deposits. Sand and gravel deposits are associated with esker systems, minor meltwater drainage channels, stagnant ice hummocky moraines, and glaciolacustrine littoral deposits. Till occurs primarily as ground moraine veneer, less than 2 m thick, and ground moraine plain, greater than 2 m thick, as well as, hummocky moraine and stagnant ice moraine. Ridged moraine and streamlined forms such as drumlins and crag and tails are less common. Till composition varies with the type of deposit, thickness and source rocks from which it is derived. At least four facies were identified: a silty-sand to sandy till, a very sandy till, a silty-sand matrix-rich diamicton and a gravelly sand diamicton. Winnowed and reworked sediments and raised strandlines, such as sand and cobble beaches, terraces, wave-cut notches and ice contact deltas indicate that glacial Lake Agassiz extended further north and west than previously thought. The highest strandlines were found at about 425-430 m asl. Much of the area below ~350 m asl is characterized by exposed outcrop, boulder lags and winnowed till. Several large southwest trending subglacial meltwater drainage systems cross, or terminate, in the map area. These systems consist of subglacial tunnel valleys and/or esker complexes, and associated ice contact deposits including ice contact deltas. A large part of the area is not suitable for drift prospecting, as bedrock, organic, ice marginal and wave-reworked deposits dominate the terrain. Drift prospecting techniques are more applicable in the MacKenzie-Zengle lakes area where the drift cover is more extensive.
Bibliography of Canadian Geomorphology