CGRG Bibliography of Canadian Geomorphology
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Author : Campbell, J.E.
Date : 2005.
Title : The presence of proglacial lakes in the Reindeer Lake area, northeastern Saskatchewan.
Publication : Water, Ice, Land, And Life: The Quaternary Interface. Canadian Quaternary Association 2005 Conference June 5-8, 2005, University of Manitoba, Winnipeg, Manitoba.
Issue : Abstract Volume:
Page(s) : A11.
Abstract
Recent surficial mapping in the northwestern Reindeer Lake area has identified ice contact deltas, sporadic lacustrine deposits and raised strandlines, such as sand and cobble beaches, terraces and wave-cut notches, indicating that glacial Reindeer Lake and/or glacial Lake Agassiz extended further north and west than previously recognized (Schreiner, 1983; Teller et al., 1983 and Teller and Leverington, 2004). Numerous well-developed beaches, wave-cut notches and terraces are at ~350-355 m asl. Much of the area below ~350 m asl is characterized by outcrop, boulder lags and winnowed till. This elevation is consistent with the previous published water level for glacial Lake Agassiz in the Reindeer Lake area. Although the majority of the well-developed beaches were formed at or below approximately 350 ±5 m asl, sand and cobble beaches were found on the highlands as high as 420-425 m asl with winnowed till surface above the strandlines, suggesting that the water level was at an even higher elevation at some time. Several moderately well-developed strandlines were also found between 410 and 370 m asl. Ice contact deltas occur at elevations ranging from 370 to 405 m asl. The higher elevation strandlines were not observed in the southern portion of the study area, which is mostly below 410 m asl. Kaszycki and Way Nee (1990) mapped strandlines at elevations greater than 400 m asl east of Brochet, Manitoba (NTS Map sheet 64F) indicating that this higher water level, proglacial lake also occupied the region to the east of the Reindeer Lake basin. Schreiner (1984) recorded strandlines as high as 420 m asl west-northwest of the area, which he attributed to Glacial Wollaston Lake. Based on their regional extent, these high elevation strandlines suggest the presence of one large proglacial lake rather than smaller precursor glacial lakes, and therefore, are more likely related to glacial Lake Agassiz rather than Glacial Reindeer and Wollaston Lakes. Therefore, it is proposed that the northwest extent of Lake Agassiz around 8,400-8,200 14C BP was more extensive than previously reported (Schreiner, 1983, 1984; Teller et al, 1983; Teller and Leverington, 2004). Although the amount of glacio-isostatic rebound in this region is unknown, the higher elevation strandlines suggest that the water level may have been higher than previously thought during this stage of Lake Agassiz. These are preliminary observations and ideas and more work in needed to confirm the interpretations
Bibliography of Canadian Geomorphology