Question

When scientists analyzed drilling samples from the Glomar Challenger study, which discovery did they make about rocks in relation to a mid-ocean ridge?
Rocks closer to the ridge are newer.
Rocks closer to the ridge contain more iron.
Rocks farther from the ridge are denser.
Rocks farther from the ridge are more jagged.

Answer 1

Answer: (A)

Explanation: Rocks closer to the ridge are newer.

Answer 2

The correct answer is:

Rocks closer to the ridge are newer.

The Glomar Challenger was a drilling ship built in 1968 to gather samples from the ocean floor. The study found that the more distant away from a ridge the samples were obtained, the older the rocks were. Therefore, the youngest rocks were always in the closer to the ridges. This was proof of the sea-floor spreading that had previously taken place.