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MAJOR glacial floodways of Southern Ontario!
I tend to verify my statements/conclusions with links to verify and replace bibliography, notes, index, etc.
This is the second web page of my series (entitled "OBG-Passageway") in which I have been trying to explain how a giant rift valley a.k..a. the Ottawa Bonnechere Graben affected the landscape and Cultural Heritage within the Nipissing and Temikaming regions particularly Lake Nipissing and Mattawa River valleys.
These river valleys
were all the major glacial floodways that exist in Ontario.
Mattawa & Ottawa
Virtually every stream and most valleys in Canada carried glacial melt waters
but only those mentioned above are in Ontario and could be classed as
major in that they carried meltwaters from hundreds and even thousands of kilometres away.
Following is the story (contained in 11 page slide show) about these major glacial spillways that have come through what I call the OBG Passageway which is a gigantic crack in the Canadian Shield (30 to 40 kilometres wide and about 300 metres deep) which allowed meltwaters of the latest, and perhaps earlier ice sheets, to outlet to the Atlantic Ocean.
I did this because I had came come to the conclusion
that something very interesting has been ignored far too long
despite the fact that the Canadian Government's Geological Survey (GSC) and other scientists have done excellent research producing great documentation on the retreat of the Laurentide (Wisconsin) glaciation.
These detailed maps of that post glacial drainage came from GSC's 2003 open file 1574 entitled
"An outline of North American Deglaciation with emphasis on central and northern Canada"
(this takes a long time to load)
by Arthur S. Dyke of GSC, 601 Booth Street, Ottawa, Ontario, Canada, K1A 0E8; E-mail: ADyke@NRCan.gc.ca.
I chose 10 of 1574'a image data to create a slide showing the Laurentide ice retreat and the major drainage that occurred --
Click here to proceed to Slide #1 - 18,000 years ago.