Karst hydrogeology within a subarctic peatland: Attawapiskat River, Hudson Bay lowland, Canada
The Attawapiskat River has cut through 30 m of mid-Silurian limestone ∼90 km west of James Bay in the Hudson Bay Lowland. Limestone cliffs of 12–15 m provide local relief along the river but inland the terrain is flat, covered by 1.5 m or more of peat. The area emerged from the Tyrrell Sea ∼4400 yr....
| Published in: | Journal of Hydrology |
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| Main Author: | |
| Format: | Text |
| Language: | unknown |
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Digital Commons @ University of South Florida
2003
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| Online Access: | https://digitalcommons.usf.edu/kip_articles/3047 https://doi.org/10.1016/0022-1694(83)90243-3 |
| Summary: | The Attawapiskat River has cut through 30 m of mid-Silurian limestone ∼90 km west of James Bay in the Hudson Bay Lowland. Limestone cliffs of 12–15 m provide local relief along the river but inland the terrain is flat, covered by 1.5 m or more of peat. The area emerged from the Tyrrell Sea ∼4400 yr. B.P. Since that time two karst hydrogeological zones have become established. These are: (1) a vadose fluvio-karst zone in the exposed limestone along the river represented by disappearing lakes and streams; and (2) an organo-karst zone represented by sinkholes on or next to limestone bioherms within the peat mantle. They occupy 16% and 13% of the study area, respectively. |
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