What area was carved by glaciers during the ice age?

The glacial lake ...

Glaciers are huge moving mountains of ice that can directly affect the landscape in many ways. The carving and shaping of the land beneath a moving glacier is a process referred to as glacial erosion. As a glacier moves over the earth's surface, it plucks up rocks and sediment, which then get stuck to its belly and go along for the ride. These particles act like sandpaper and scratch the bedrock below. The removal or rocks and grinding of bedrock create entirely new landscapes.