In northern canada where there was the greatest accumulation of glacial ice, the weight of the ice actually caused downwarping of the crust

because a thick mass of ice that originates on land from the accumulation, compaction, and recrystallization of excess snowfall 
(land base features)
(highly viscous fluid)
(Glaciers develop and advance over significant time periods more winter snow falls on land that melts in summer)

Exposed great deposits of coal and iron ore

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!