How A Forgotten Lake Shaped Canada's Largest City

Hey Everyone!

13,000 years ago, downtown Toronto was completely underwater—submerged beneath Glacial Lake Iroquois, a massive prehistoric lake that was bigger and deeper than Lake Ontario. This video explores how this lost Ice Age lake shaped modern Toronto, from Davenport Road (which traces the ancient shoreline) to the clay soil that frustrates gardeners and construction crews across the city. Discover how a catastrophic drainage event transformed this giant lake into Lake Ontario, leaving behind geological fingerprints that define Toronto's landscape today.

Cheers,
Further Reading:
https://cdnsciencepub.com/doi/10.1139/cjes-2019-0076#:~:text=par%20la%20R%C3%A9daction%5D-,Introduction,with%20recently%20inferred%20age%20constraints.
https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/10/1/165/89/Lake-Iroquois-and-its-predecessors-at-Toronto
https://www.sciencedirect.com/science/article/abs/pii/S0380133007700527
https://web.archive.org/web/20081031073825/http://www.geo.msu.edu/schaetzl/PDFs/Larson-Great_lakes.pdf
https://pubs.geoscienceworld.org/gsa/geology/article-abstract/33/2/89/129325/Catastrophic-meltwater-discharge-down-the-Hudson?redirectedFrom=fulltext
https://www.atmosp.physics.utoronto.ca/~peltier/pubs_recent/Stokes%20et%20al,%20On%20the%20reconstruction%20of%20palaeo-ice%20sheets%20-%20recent%20advances%20and%20future%20challenges,%20QSR%20125,%2015-49,%202015.pdf
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Disclaimer:

None of the images used in this video belong to me. All images are the property of their respective owners. I do not claim ownership of any of the images used in this video. If you are the rightful owner of any image and wish for it to be removed or properly credited, please contact me and I will promptly take appropriate action. All images are Creative Commons Licensed.

CC:
Iceage north-glacial hg.png, Hannes Grobe, https://creativecommons.org/licenses/by/3.0/deed.en

Location of Northern Hemisphere ice sheets at the LGM (21 kyr BP): Cordillera, Laurentide, Innuitian, Greenland, Barents-Kara, Fennoscandia and British-Irish Ice Sheets, NIU L, LOHMANN G, HINCK S, GOWAN EJ, KREBS-KANZOW U., https://creativecommons.org/licenses/by/4.0/deed.en

High Park (37832920404).jpg, Jeff Hitchcock, https://creativecommons.org/licenses/by/2.0/deed.en

This is a map of the Hudson River Watershed I made using USGS data, includes the Mohawk River., Kmusser, https://creativecommons.org/licenses/by-sa/3.0/

Mohawk River in autumn.jpg, Tyler A. McNeil, https://creativecommons.org/licenses/by-sa/4.0/deed.en
Glacial clay.jpg, Sten Porse, https://creativecommons.org/licenses/by-sa/2.5/deed.en

Don Valley Parkway May 2013.jpg, mark.watmough, https://creativecommons.org/licenses/by/2.0/deed.en

Finch Meandor with Rouge River.jpg, Thanujan24, https://creativecommons.org/licenses/by-sa/4.0/deed.en
Toronto - ON - Humber Bay und Humber Bay Arch Bridge.jpg, Toronto: Humber Bay Arch Bridge (Architekten: Montgomery and Sisam Architects) über den Humber River, dahinter die Humber Bay mit Sicht auf die Skyline Torontos, https://creativecommons.org/licenses/by-sa/3.0/deed.en

Видео How A Forgotten Lake Shaped Canada's Largest City канала Urban Atlas