Late Wisconsin and Holocene retreat of the Laurentide ice sheet
Geological Survey of Canada.
Ottawa : Geological Survey of Canada ,
1987.
Retreat of Laurentide Ice-sheet. Palaeogeography.
A fascinating picture of how the last North American ice-sheet melted, with ice-front dates to the nearest hundred years. At some times and places ice-front retreat was of the order of 1/2 km per year elsewhere the front hardly moved for many centuries. Other surprising facts emerge, for example the nearly ice-free northern Yukon while ice still covered the site of Chicago.
North America
Exhibited by Edinburgh Geological Society
Edinburgh Geological Society,