Question: What is the official French name of the annular lakes on the large area of exposed Precambrian igneous and high-grade metamorphic rocks (geological shield) that forms the ancient geological core of the North American continent (the North American Craton or Laurentia)?
Sentence (from "Canadian Shield"): Composed of igneous rock resulting from its long volcanic history, the area is covered by a thin layer of soil.
Relevant evidence: No