Late Wisconsin deglaciation and Holocene river evolution near Fort Nelson, northeastern British Columbia
Glacial lakes were formed in the Fort Nelson area by eastward-retreating Laurentide glacier ice that dammed a number of streams. These lakes drained through spillways at progressively lower elevations as the ice retreated eastward. A terrace on the Muskwa River containing sediments dated ca. 9000 ye...
| Published in: | Canadian Journal of Earth Sciences |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Canadian Science Publishing
1987
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| Online Access: | http://dx.doi.org/10.1139/e87-017 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-017 |
| Summary: | Glacial lakes were formed in the Fort Nelson area by eastward-retreating Laurentide glacier ice that dammed a number of streams. These lakes drained through spillways at progressively lower elevations as the ice retreated eastward. A terrace on the Muskwa River containing sediments dated ca. 9000 years BP indicates that the river had entrenched itself between 50 and 70 m below the surrounding upland by that time. Prior to final entrenchment by the Muskwa River to its present grade, a pause in downcutting ca. 9000 years BP occurred, resulting in the formation of the terrace. |
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