Why are different parts of a continent often different ages?
A. Igneous, sedimentary, and metamorphic rocks were all created at different times, so these different types of rock yield the different ages.
B. Different ages only mean that different radiometric isotopes have been used to date the different parts; rocks on one continent are the same age.
C. Different ages of terranes may be accreted onto continents, and newer-aged sedimentary rocks or volcanic rocks are deposited on top of older rocks.
Answer: C
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What will be an ideal response?