Late Pleistocene depositional systems of Metropolitan Toronto and their engineering and glacial geological significance
The municipality of Metropolitan Toronto (area 480 km 2 , population 2.15 million) is centrally located on the Late Pleistocene sedimentary infill of the Laurentian Channel, a broad bedrock low up to 115 km wide connecting the Huron and Ontario basins. This channel forms part of a relict (late Terti...
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crcansciencepubl:10.1139/e87-098 2023-12-17T10:31:48+01:00 Late Pleistocene depositional systems of Metropolitan Toronto and their engineering and glacial geological significance Eyles, N. 1987 http://dx.doi.org/10.1139/e87-098 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-098 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 24, issue 5, page 1009-1021 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1987 crcansciencepubl https://doi.org/10.1139/e87-098 2023-11-19T13:38:43Z The municipality of Metropolitan Toronto (area 480 km 2 , population 2.15 million) is centrally located on the Late Pleistocene sedimentary infill of the Laurentian Channel, a broad bedrock low up to 115 km wide connecting the Huron and Ontario basins. This channel forms part of a relict (late Tertiary?) drainage network (the Laurentian River) modified by Pleistocene glacial erosion and infilled by over 100 m of glacial and interglacial sediments. The subsurface stratigraphy of the channel fill below Metropolitan Toronto has been established from many different data sources and is depicted, in this paper, as a series of cross sections with a total length of nearly 105 km.The subsurface stratigraphy has been divided, provisionally, into five depositional complexes, which have been mapped in the subsurface along several transects. These are (1) a glacial complex of Illinoian (?) age, (2) a lacustrine complex of Sangamon Interglacial and earliest Wisconsinan sediments (120 000 – 75 000 BP?), (3) a glaciolacustrine – lacustrine complex spanning the Early and Mid-Wisconsinan (75 000 – 30 000 BP?), (4) a Late Wisconsinan (> 30 000 BP) glacial complex, and (5) a postglacial lacustrine complex (ca. 12 000 BP).The data presented in this paper are significant for applied geological investigations in the heavily urbanized Toronto area and provide new insights into the glacial history of the Ontario Basin, in particular the regional extent of the Laurentide Ice Sheet margin prior to the Late Wisconsinan. Article in Journal/Newspaper Ice Sheet Canadian Science Publishing (via Crossref) Canadian Journal of Earth Sciences 24 5 1009 1021 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Eyles, N. Late Pleistocene depositional systems of Metropolitan Toronto and their engineering and glacial geological significance |
topic_facet |
General Earth and Planetary Sciences |
description |
The municipality of Metropolitan Toronto (area 480 km 2 , population 2.15 million) is centrally located on the Late Pleistocene sedimentary infill of the Laurentian Channel, a broad bedrock low up to 115 km wide connecting the Huron and Ontario basins. This channel forms part of a relict (late Tertiary?) drainage network (the Laurentian River) modified by Pleistocene glacial erosion and infilled by over 100 m of glacial and interglacial sediments. The subsurface stratigraphy of the channel fill below Metropolitan Toronto has been established from many different data sources and is depicted, in this paper, as a series of cross sections with a total length of nearly 105 km.The subsurface stratigraphy has been divided, provisionally, into five depositional complexes, which have been mapped in the subsurface along several transects. These are (1) a glacial complex of Illinoian (?) age, (2) a lacustrine complex of Sangamon Interglacial and earliest Wisconsinan sediments (120 000 – 75 000 BP?), (3) a glaciolacustrine – lacustrine complex spanning the Early and Mid-Wisconsinan (75 000 – 30 000 BP?), (4) a Late Wisconsinan (> 30 000 BP) glacial complex, and (5) a postglacial lacustrine complex (ca. 12 000 BP).The data presented in this paper are significant for applied geological investigations in the heavily urbanized Toronto area and provide new insights into the glacial history of the Ontario Basin, in particular the regional extent of the Laurentide Ice Sheet margin prior to the Late Wisconsinan. |
format |
Article in Journal/Newspaper |
author |
Eyles, N. |
author_facet |
Eyles, N. |
author_sort |
Eyles, N. |
title |
Late Pleistocene depositional systems of Metropolitan Toronto and their engineering and glacial geological significance |
title_short |
Late Pleistocene depositional systems of Metropolitan Toronto and their engineering and glacial geological significance |
title_full |
Late Pleistocene depositional systems of Metropolitan Toronto and their engineering and glacial geological significance |
title_fullStr |
Late Pleistocene depositional systems of Metropolitan Toronto and their engineering and glacial geological significance |
title_full_unstemmed |
Late Pleistocene depositional systems of Metropolitan Toronto and their engineering and glacial geological significance |
title_sort |
late pleistocene depositional systems of metropolitan toronto and their engineering and glacial geological significance |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/e87-098 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-098 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Canadian Journal of Earth Sciences volume 24, issue 5, page 1009-1021 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e87-098 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
24 |
container_issue |
5 |
container_start_page |
1009 |
op_container_end_page |
1021 |
_version_ |
1785585205751316480 |