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On both sides of what is the pattern of parallel magnetic stripes found on the ocean floor?

Answer and explanation

Correct answer: Mid-oceanic ridges

Parallel magnetic stripes on the ocean floor are found symmetrically on both sides of mid-oceanic ridges. New oceanic crust forms at these underwater ridges when magma rises, cools, and hardens. Iron-bearing minerals in the cooling rock record the direction of Earth’s magnetic field at that time. Because Earth’s magnetic field has reversed repeatedly, alternating magnetic bands are preserved in the crust as it moves away from the ridge.

Thus, option C is correct. The matching pattern on both sides is important evidence for sea-floor spreading and supports the theory of plate tectonics. Continental deserts, river valleys, and glacial lakes do not continuously create this symmetrical ocean-floor record. The ridge is the place where new crust is produced and then carried outward.

Related tags

GeographyMagnetic AnomalyMid Ocean Ridge

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