The nucleus of old crystalline rock in each of the principal continental masses is called a
A) basalt mass.
B) continental shield, or craton.
C) mountain mass.
D) composite zone.

Name: The nucleus of old crystalline rock in each of the principal continental masses is called a A) basalt mass. B) continental shield, or craton. C) mountain mass. D) composite zone.
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Question

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The nucleus of old crystalline rock in each of the principal continental masses is called a continental shield, or craton.

The Nucleus of Old Crystalline Rock in Each of the Principal