ConcepTest: Age of Sea Floor Near Mid-Ocean Ridge

S Atlantic Ridge

If you dredged a sample of volcanic rock from locality X, the most likely age of the rock (in other words, the amount of time elapsed since the rock cooled from a magma) would be:

(A) 1 year (B) 1 million years (C) 10 million years

(D) 100 million years (E) Not enough information