The American name for the glacial period starting about 750,000 to 800,000 years ago and lasting about 50,000 years. North America and the Alps were ice-covered with Northern Europe and the Arctic Ocean relatively ice-free. Two stadials are recognized in this period, and it is called the Gunz period in the Alpine classification system. The was followed by the Kansan period.
Pertaining to the first classical glacial stage of the Pleistocene Epoch in North America, followed by the Aftonian interglacial stage.
of or having to do with the first period of glaciation in North America, beginning about 1,200,000 years ago, and lasting about 64,000 years. [AHDOS