Lake Huron, the third largest of the Great Lakes, is contained within a basin underlain by ~400 million year old (0.4 bya) limestone, dolomite, and gypsum bedrock — rock that was formed from the ...

Georgian Bay, tucked into Ontario's Lake Huron, is a bit of a misnomer. At 5,792 square miles it's not that much smaller than Lake Ontario (7,320 square miles), earning it the nickname "the sixth ...