Directorios

Enlace: http://collections.ic.gc.ca/ice/

Descripción: Canada's Digital Collections. Government of Canada.
«During the Pleistocene Epoch there were at least four ice caps or glaciations in North America. The first known extension was over a smaller area affecting Labrador, Quebec, Ontario and some of Manitoba. Evidence of that movement has been largely obliterated by the ice caps that followed.»