Which information is needed to construct a geomagnetic time scale? Select the two correct answers.
(1 point)
Responses
the length of the mid-oceanic ridge
the length of the mid-oceanic ridge
the magnetic direction of rocks along the surface of Earth
the magnetic direction of rocks along the surface of Earth
the age of rocks along the surface of Earth
the age of rocks along the surface of Earth
the average speed of tectonic plates on Earth
the magnetic direction of rocks along the surface of Earth
the age of rocks along the surface of Earth