Using the distance scale in this image, the ( Pacific, South Atlantic, North Atl

Question

Using the distance scale in this image, the ( Pacific, South Atlantic, North Atlantic ) has spread the greatest distance during the last 2 million years. Circle your answer.

Ridge crest Pacific Ocean Ocean floor crust South Atlantic Ocean Magnetic polarity record million years North Atlantic Ocean 20 40 km Figure 10.5 Generalized record of the magnetic polarity reversals near the mid-ocean ridge in the Pacific, South Atlantic, and North Atlantic oceans. Periods of normal polarity are shown in color and correspond to those illustrated in Figure 10.4.

Explanation / Answer

Answer : Pacific ocean

Since the magnetic polarities are well developed on either sides of the Pacific ocean's mid oceanic ridge, it is the one which has spread for great distances with fast spreading rates

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