what is the shallowest and warmest great lake
Lake Erie is the shallowest of the Great Lakes because the ice was relatively thin and lacked erosion power when it reached that far south, according to one view. As many as three glaciers advanced and retreated over the land causing temporary lakes to form in the time periods in between each of them.
Lake Erie is the warmest of all of the Great Lakes, but it also freezes over more than the other lakes. It is the fourth largest when measured in surface area, with round 9,910 square miles (25,700 square kilometers) and the smallest by water volume, with 116 cubic miles (484 cubic km), according the Environmental Protection Agency (EPA).