Magnetic reversals _____.
Ahave never occurred during geologic time
Bprovide strong evidence for sea-floor spreading
Cconfirm the existence of subduction zones
Dcause the movements of tectonic plates
Ahave never occurred during geologic time
Bprovide strong evidence for sea-floor spreading
Cconfirm the existence of subduction zones
Dcause the movements of tectonic plates