Spreading at mid ocean ridges tends to occur in increments rather than continuously.

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Spreading at mid ocean ridges occurs through a process called seafloor spreading, where new crust is formed at the ridge and spreads away from it. This spreading tends to occur in small increments, with periods of activity followed by periods of inactivity. This is due to the way that magma is supplied to the ridge and the way that the new crust is formed and cooled.

Spreading at Mid Ocean Ridges Tends to Occur in Increments