| Reference Type | Journal (article/letter/editorial) |
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| Title | Late Wisconsinan glacial stratigraphy and history of southeastern Manitoba |
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| Journal | Canadian Journal of Earth Sciences |
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| Authors | Teller, James T. | Author |
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| Fenton, Mark M. | Author |
| Year | 1980 (January 1) | Volume | 17 |
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| Issue | 1 |
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| Publisher | Canadian Science Publishing |
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| DOI | doi:10.1139/e80-002Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 476470 | Long-form Identifier | mindat:1:5:476470:4 |
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| GUID | 0 |
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| Full Reference | Teller, James T., Fenton, Mark M. (1980) Late Wisconsinan glacial stratigraphy and history of southeastern Manitoba. Canadian Journal of Earth Sciences, 17 (1) 19-35 doi:10.1139/e80-002 |
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| Plain Text | Teller, James T., Fenton, Mark M. (1980) Late Wisconsinan glacial stratigraphy and history of southeastern Manitoba. Canadian Journal of Earth Sciences, 17 (1) 19-35 doi:10.1139/e80-002 |
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| In | (1980, January) Canadian Journal of Earth Sciences Vol. 17 (1) Canadian Science Publishing |
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| Abstract/Notes | The history of Late Wisconsinan glaciation in southwestern Manitoba has been established by identifying and correlating ice-laid lithostratigraphic units in the subsurface. Five Late Wisconsinan tills are defined on the basis of their texture, mineralogic composition, and stratigraphic position. These new formations are, from youngest to oldest, Marchand, Whitemouth Lake, Roseau, Senkiw, and Whiteshell Formations.Late Wisconsinan ice first invaded southeastern Manitoba 22β000 to 24β000 years ago. This Laurentide glacier advanced from the northeast across the Precambrian Shield and deposited the sandy Whiteshell and Senkiw tills, which contain abundant Precambrian rock fragments and minerals and few Paleozoic carbonate grains. Shortly after this, Keewatin ice advanced from the northwest over Paleozoic carbonate rocks, depositing the loamy carbonate-rich Roseau Formation throughout most of the area. This ice remained over southeastern Manitoba until after 13β500 years ago, when it rapidly retreated northward with Lake Agassiz on its heels. Two brief glacial readvances occurred. The first overrode Lake Agassiz lacustrine sediment as far south as central North Dakota shortly after about 13β000 years ago. The clayey Whitemouth Lake till was deposited in southern Manitoba at this time. After a rapid retreat, the ice briefly pushed southward over southeastern Manitoba about 12β000 years ago to just south of the International Boundary. The sandy carbonate-rich Marchand Formation was deposited at this time as the ice overrode its own sandy outwash. By 11β000 years ago, ice had disappeared from southeastern Manitoba. |
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