How do we determine absolute direction of plate movement over millions of years?
A)with astronomical positioning
B)with global position systems (GPS)
C)with seafloor isochrons
D)by looking at the alignment of mountain ranges on the continents

Question

Quizplus · Accepted Answer

Seafloor isochrons, which are age markers within the oceanic crust, provide a record of the direction and speed of plate movement over millions of years. These isochrons are created by the periodic reversals of the Earth's magnetic field, which are recorded in the oceanic crust as it forms at mid-ocean ridges. By mapping these magnetic anomalies, scientists can reconstruct the historical movements of tectonic plates.

How Do We Determine Absolute Direction of Plate Movement Over