the area around the great lakes was once covered by thick sheets of ice. Use the principal of isostasy to explain how the melting of these ice sheets has effected the land around the lakes?

Answer 1

http://gsa.confex.com/gsa/2008NC/finalprogram/abstract_137680.htm

Answer 2

The area around the Great Lakes was once covered by thick sheets of ice. Use the principle of isostasy to explain how the melting of these ice sheets has affected the land around the lakes.