Regions where Precambrian metamorphic rocks are exposed at the surface are termed ____________.

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Shields are large areas of exposed Precambrian metamorphic rocks, often centered around a stable core of ancient rock called a craton. These areas are tectonically stable and have typically not experienced significant deformation or mountain-building events in millions of years. Examples include the Canadian Shield and the African Shield. Platforms, on the other hand, are regions of flat-lying sedimentary rocks that may overlie shield areas or other geologic features, while convergent margins are locations where two tectonic plates are colliding and often experiencing deformation and mountain-building processes.

Regions Where Precambrian Metamorphic Rocks Are Exposed at the Surface