record a sequence of reversals of the Earth's magnetic field
show a symmetrical pattern on each side of the spreading center
are created as magma crystallizes and cools below the Curie Point at the mid-ocean ridges
all of the above
none of the above
What is Pangaea?
The geographic location where a rock formed can be determined based on:
b and c
What is the approximate age of the oldest rocks on the sea floor?