In the theory of sea-floor spreading, the age of oceanic crust:Increases systematically from mid-ocean ridges to continental marginsShows random distribution unrelated to ridge distanceIs oldest at mid-ocean ridges where new crust formsRemains constant across ocean basinsWhich statement is correct?

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SSC Geography QUESTION #6299

Question 1

In the theory of sea-floor spreading, the age of oceanic crust:

Increases systematically from mid-ocean ridges to continental margins
Shows random distribution unrelated to ridge distance
Is oldest at mid-ocean ridges where new crust forms
Remains constant across ocean basins

Which statement is correct?

Statement 1 is correct✔️
Statement 2 is correct
Statement 3 is correct
Statement 4 is correct

Correct Answer Explanation

Sea-floor spreading at mid-ocean ridges creates new oceanic crust that moves away from the ridge. Therefore, crust age increases systematically with distance from the ridge axis - youngest at ridges (~0 Ma) and oldest near subduction zones (~200 Ma).

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