Most continents contain large central areas in which very ancient rocks are exposed. These areas are called ____.

Name: Most continents contain large central areas in which very ancient rocks are exposed. These areas are called ____.
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Precambrian shields are large central areas in continents that have very ancient rocks exposed. These shields make up the cores of continents and are typically made up of igneous and metamorphic rocks that are at least 1 billion years old.

Most Continents Contain Large Central Areas in Which Very Ancient