Jungles on the Canadian Plain? What is this, 25,000,000 BC?
The Canadian Plains alternate between plains and glaciers.
Again, and I'm trying to help you here:
"Fluctuations in Atmospheric and Oceanic patterns, sunspot activity, etc, should be looked into as causes of temporary changes in weather trends that some blow out of proportion into some grand climatic shift, not a cycle that regularly spans 27,000 years and causes the ebb and flow of ice ages."
You're on the wrong track. You're not going to debunk a bogus theory with a bogus theory of your own.