Question

Why does the ocean crust show a sequence of magnetic polarity changes symmetric across the mid-ocean ridge? Explain fully. What is the average rate of seafloor spreading in cm/yr (100,000 cm = 1 km), if the age of the magnetic anomaly shown below is 3 million years old at point A? Show your work. (The figure below is a map view of the Northern Mid-Atlantic Ridge with the central axis of the ridge defined by the line below.
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Answer 1

The ocean crust is known to show a sequence of magnetic polarity given that it shows us that there is the formation of a new sea floor at the mid ranges of the ocean. This is where they are seen to separate from themselves on the sides of the ridge.

What is seafloor spreading?

This is the term that is used to refer to the spreading that occurs at the mid ocean ridges. These are the areas where the new oceanic crusts get to be formed.

Hence we can say that The ocean crust is known to show a sequence of magnetic polarity given that it shows us that there is the formation of a new sea floor at the mid ranges of the ocean. This is where they are seen to separate from themselves on the sides of the ridge.

Read more on seafloors here: brainly.com/question/23287809

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