Also known as the Laurentian Plateau, what is the name of the huge area of exposed igneous and metamorphic rocks that covers over half of Canada and most of Greenland?

The Canadian Shield is among the oldest on earth, with some of it being up to 4 billion years old. Originally, the Shield was an area of huge mountains, some of which might have been nearly 40,000 feet tall, but over time, it got eroded down to its much more flat state.

Asked by Tom Cohen · Last updated 5 years ago · 1.2K views