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
the over 500 million year old Ottawa Bonnechere Graben combined with the most recent retreat of Pliestocene retreat has affected recent Cultural Heritage within the Nipissing and Temikaming regions particularly the Petawawa, Mattawa and Ottawa river vallies and the movement of birds, animals and people!
The Trent, Petawawa, Mattawa & Ottawa Rivers were all major glacial floodways
Virtually every stream and most valleys in Canada carried glacial melt waters but only the four mentioned above are in Southern Ontario and could be classed as major glacial spillways in that they carried meltwaters from hundreds and even thousands of kilometres away.
Following is the story about major glacial spillways that have come through what I call the OBG Passageway - (a gigantic crack or rift valley) in the Canadian Shield which allowed the meltwater of the latest, and perhaps earlier ice ages, to outlet to the Atlantic Ocean.
I have 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.
Produced in 2003 - an excellent GSC report was entitled
An outline of North American Deglaciation with emphasis on central and northern Canada (takes a long time to load) by Arthur S. Dyke of Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario, Canada, K1A 0E8; E-mail: ADyke@NRCan.gc.ca.
Click here to proceed to #1 - 18,000 years ago.