The spreading of the sea floor along the Mid-Atlantic ridge is supported by
A)changes in the orientation of magnetized rocks as one moved away from the ridge.
B)the increase in the thickness of the sediment layer as one moved toward the continents.
C)the large amount of heat escaping from the rift along the ridge.
D)all of these support the sea-floor spreading hypothesis.

Question

Quizplus · Accepted Answer

All of these support the sea-floor spreading hypothesis. The changes in the orientation of magnetized rocks, known as magnetic anomalies, show that the sea floor is spreading apart at the Mid-Atlantic Ridge. The increase in the thickness of sediment layer toward the continents is consistent with the idea that the sea floor is spreading apart at the ridge. The large amount of heat escaping from the rift along the ridge is caused by the movement of magma beneath the sea floor, which is also consistent with sea-floor spreading.

The Spreading of the Sea Floor Along the Mid-Atlantic Ridge