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Glacial outwash at Saskatchewan Glacier
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Glacial outwash at Saskatchewan Glacier
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Glacial outwash at Saskatchewan Glacier
Glacial outwash at Saskatchewan Glacier
Glacial outwash at Saskatchewan Glacier
Glacial outwash at Saskatchewan Glacier
Glacial outwash at Saskatchewan Glacier
Glacial outwash at Saskatchewan Glacier
Erosional formations at Saskatchewan Glacier
Erosional formations at Saskatchewan Glacier
Erosional formations at Saskatchewan Glacier
Erosional formations at Saskatchewan Glacier
Erosional formations at Saskatchewan Glacier
Structural morphologies at Saskatchewan Glacier
Structural morphologies at Saskatchewan Glacier
Structural morphologies at Saskatchewan Glacier
Structural morphologies at Saskatchewan Glacier
Graded bedding
Lake at Saskatchewan Glacier
Lake at Saskatchewan Glacier
Lake at Saskatchewan Glacier
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Glacial outwash at Saskatchewan Glacier
Glacial outwash is the distribution of sediment that has been transported by meltwater in a downhill direction. Larger sediment gets deposited near the toe of the glacier while finer sediment and sand gets deposited further downstream. Finer sediments can be transported at a further distance because it becomes suspended in the water column until flow velocity slows. Image A is a shallow meandering stream composed of various grain sizes including sand and gravel. The milky blue water in all the images is due to ‘rock flour’ which is suspended fine sediment formed by mechanical erosion of bedrock by glacial movement. Image B is also a meandering stream and has a much higher flow velocity than the stream in image A. The trimline can be seen in image B-1 and represents the recent thickness of the glacier where the fine sediment interacts with the un-weathered bedrock along the walls of the valley. The high flow velocity in image B is leading to erosion of the cut bank and deposition of large sediment seen in image B-1. Image C is a braided channel, the water here has a lower flow velocity and covers a larger area, depositing finer sediments and sand. Image D is also a braided outwash channel and faces away from the foot of the glacier, highlighting the U-shaped valley. Image E is near the toe of the glacier and shows a large amount of meltwater draining from beneath the glacier as well as large pieces of ice. Image F is an aerial image of the braided channel further downstream and the sediment here is much finer-grained than in images A through E.
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Digitized Date
07/26/2017
Creator
Dolphin, Glenn
Digital Publisher
Calgary : University of Calgary
Country
Canada
Province
Alberta
Municipality
Improvement District No. 9
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Copyright Status
In copyright
License URL
https://creativecommons.org/licenses/by/4.0/
Attribution
"Glacial outwash at Saskatchewan Glacier", 2017, (CU123712) by , is used under . Courtesy of Collection, Libraries and Cultural Resources Digital Collections, University of Calgary.
Unique identifier:
CU123712
Legacy Identifier:
20190213_geoimage_Dolphin_e_0289
Type:
Geoscience Image
Size:
5184px × 3456px 66MB