Scott Munro (MCHS ’63) has added a comment regarding the physiography of the Humber River
Scott Munro (MCHS ’63), a member of the MCHS 2015 Event Committee, has added a comment to a previous post. The topic concerns land formation processes that have occurred tens of thousands of years ago where Old Mill Toronto is now located. In geological time, the Old Mill site was once under a glacier whose thickness was measured in kilometres. When the glaciers of the last Ice Age were melting, the site was heavily influenced, in its physiographical features, by massive flows of water, which which helped to shape the river valley now evident in the area. That’s the gist of my understanding of some of the many drawn-out geological events that have occurred here in the past. That’s the extent of my own vague understanding of these matters and I’m always keen to learn more.
Scott will play “Amazing Grace,” on his bagpipes, before we begin the Humber Dinner Buffet at 7:30 pm on Oct. 17, 2015 at Old Mill Toronto.
Scott writes, in a comment at a previous post:
Hi Jaan – This relates to item 3) in your blog. Part of what you write there relates to the location of the Lake Iroquois shoreline, on which Casa Loma is situated further east. Also, the Humber River underfits its current valley which was likely a spillway for large amounts of meltwater produced by the decaying ice cover of the Laurentide Ice Sheet, amounts that probably did not occur again until the arrival of Hurricane Hazel or previous unrecorded storms.
Lake Iroquois drained out through the Mohawk Valley of New York State to the Hudson, then shrank into the current space of Lake Ontario, after which time the outflow was redirected down the St. Lawrence River because by then the ice sheet no longer blocked the St. Lawrence Valley. Best – Scott
[End of text]
A brief history of the Lake Iroquois shoreline
An July 14, 2012 article at blogTO is entitled:
A brief history of the Lake Iroquois shoreline in Toronto
The article includes a Wikipedia link; speaking for myself I tend to stay away in most cases from relying on Wikipedia as a source for any topic.
That said, the above-noted article displays the following map, which I find very helpful:
Map of Lake Iroquois Shoreline through Toronto
From a close-up view of the map, you can see that the Lake Iroquois shoreline was located a significant distance north of Old Mill meaning that during the existence of the lake, Old Mill was underwater as was the case with the area that is now downtown Toronto. At the point where the waters of Glacial Lake Iroquois receded to their temporary limit, the shoreline of the smaller lake (known as Glacial Lake Admiralty whose shoreline is still in place underwater) ended up a considerable distance to the south of Old Mill.
In time, when the current version of Lake Ontario made its appearance, the shoreline of the lake was near Old Mill. However, in the past four hundred years, the shoreline of Toronto has wandered a ways further south, thanks to the building up of land through infill. Similarly, Fort York used to be at the shoreline but thanks to landfill, the shoreline has moved a considerable distance to the south.
Wendat First Nation and Étienne Brûlé
The scale of geomorphological processes, evident in the vicinity of Old Mill Toronto, is remarkable. As Scott notes, Glacial Lake Iroquois has played a key role in the geological history of the area.
Also with regard to history, I have previously written about the Étienne Brûlé and Wendat Project, which commemorates the journey 400 years ago (as of September 2015) of Étienne Brûlé and Wendat First Nations guides to the mouth of the Humber River.
According to the available archival evidence, September 1615 was the first time that a European set eyes on Lake Ontario. We can add that, as noted above, four hundred years ago the shoreline of the lake was located close to where Old Mill Toronto now stands.
A related post is entitled: Étienne Brûlé / First Nations event took place on Sept. 13, 2015 at 222 Riverdale Drive
Our reunion is taking place in a natural setting, a green space in the heart of an urban environment. As a June 15, 2015 Atlantic magazine article notes, “spending time in nature is correlated with better mental health, attention, and mood in both children and adults.”
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