What kinds of rocks make up the Canadian Shield in northern Saskatchewan?

The northern third of Saskatchewan is part of the Canadian Shield, which is primarily composed of igneous and metamorphic rocks. These rocks are of Precambrian age, dating back approximately 540 million to 4 billion years.1

Because of their age and composition, these formations are often referred to as the Precambrian Shield. The region is characterized by ancient crystalline rocks that have undergone a complex history of uplift, mountain building, and erosion. Continental glaciation further shaped this landscape, leaving behind rocky outcrops and thin, discontinuous glacial deposits.123