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Table of Contents
Foreword
Preface
Glossary

Chapter 3: Geologic Structure and Landforms

3.33: Part of the Saskatchewan River/Summerberry River Delta Northwest of Cedar Lake

The photograph shows two main river channels, Summerberry River to the north 1 and the Saskatchewan River to the south 2, that flow eastward into Cedar Lake, as well as several other distributary channels. Between the two main channels is dark-toned Kakeenoskak Island 3 which is probably fen covered. “Periodically the region floods, at which time water in the delta distributary channels over flows the banks and spills across the levees.” It is here that crevasse splay deposits have formed. 4 In this extensive wetland, wooded natural levees 5 and scroll bars 6 show up much darker than the marshes that are fairly uniform and light in tone 7. “Typically, sedges, coarse grasses, reeds and rushes flourish in the marshes and account for the lighter tones.” Floating fen is seen where the water depth is very shallow and the level fluctuates throughout the summer 8. Criss-crossing linear features 9 are “ice gouge markings” made by the keels of wind or current-driven icebergs on the floor of glacial Lake Agassiz.[i]

The main river channels are uniformly light-toned resulting from suspended sediment, whereas lakes are variable ranging from almost black 10, to dark grey-Seepeesis Lake 11, to light grey--Kapakwak Lake 12 that is probably shallow enough that winds stir up bottom sediments.

Figure 3.33: Part of the Saskatchewan River/Summerberry River Delta Northwest of Cedar Lake

Figure 3.33: Part of the Saskatchewan River/Summerberry River Delta Northwest of Cedar Lake

Figure 3.33

Vertical air photograph: A13860-8

Flight height: 35,000 feet a.s.l.; lens focal length: 154.15 mm

Date: September 23, 1953

Scale: 1:19,000 (approx.)

Location: Townships 53 and 54, Ranges 23 and 24 WI

Map sheets: 1:250,000 63F The Pas

1:50,000 63F/10 Red Earth Lake

Notes

[i] Interpretation from Mollard and Janes, op. cit. 1984, 135.