The above map illustrates the different definitions of the ice edge.

Climate Change Indicators: Arctic Sea Ice

World Map - A Physical Map of the World - Nations Online Project

Laurentide Ice Sheet, Size, Retreat, Map, & Facts

Full article: Mapping ice in the Norwegian Arctic – on the edge

Regional map of the northeast United States. Surface exposure dating

Erlend A. T. Hermansen's research works

Sea Ice Index Daily and Monthly Image Viewer

/gallery/Earth/Earth-with-sol

Divergent Plate Boundary—Continental Rift - Geology (U.S. National Park Service)

Global Climate Change, Melting Glaciers