Earth's magnetic field has reversed many times during its history
Asked by admin @ in Geography viewed by 273 People
Earth’s magnetic field has reversed itself several
times during the past. This pattern of magnetic
reversal is best preserved in
(1) metamorphic bedrock in mountain ranges
(2) bedrock with fossils containing radioactive
carbon-14
(3) layers of sedimentary bedrock of the Grand
Canyon
(4) igneous bedrock of the oceanic crust