Ice core taken from Black Bay on Dec. 17. The white ice is weaker than the clear ice. This sample has 7 inches of weaker white ice, and around 1 inch of stronger, clear ice.NATIONAL PARK SERVICE/HEIBEL PHOTO
Voyaguers National Park, Dec. 27: Bah humbug! The holidays have not brought any new snow to Voyageurs, and warmer temperatures have slowed ice formation on…