Answer: C) The crust crumples as it encounters resistant, older and cooler rocks on either side of the ridge.
What happens to existing oceanic crust as magma extrudes and solidifies at an oceanic ridge?
A) The crust melts because of the intense pressures at the volcanically active zone.
B) The crust breaks in half and moves away from the ridge.
C) The crust crumples as it encounters resistant, older and cooler rocks on either side of the ridge.
Explanation: As new crust starts to forms we cannot expect a sudden movement away , it starts crumpling first as stress is developed , movement occurs as apart of stress release (also may other factors are responsible for movement)
Environmental & Atmospheric Sciences
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