Landforms of the Great Lakes - Fine Art Print Map
The Great Lakes are, cartographically, a particularly beautiful
collection of linked shapes. In the physical world, their vast surface
area makes them a set of inland seas. Their basins were carved out by
glacial action and filled by glacial melting, draining south into the
Mississippi during periods when the St Lawrence was blocked by the ice
sheet. They mark the southern edge of the Laurentian Shield covering
much of Canada (and most of Minnesota).
Massive ice sheets planed the
shield down to bare rock and very low relief. The weight depressed its
center, now Hudson Bay, into which the region’s northern rivers drain.
This is the land of literally uncountable lakes and vast wetlands in the
north. The southern parts of the region are marked by successive, often
concentric moraines, many traced by streams that formed along them.
Included on the map: The entire states of Wisconsin and Michigan, most
of Minnesota, Iowa, and New York, and parts of Indiana, Ohio, and
Illinois. Also on the map are quite a bit of Ontario and Quebec as well
as some of Manitoba.
Dimensions: All map dimensions are approximate.