... Wegener's theory, ultimately leading to the development of the theory of plate tectonics. Plate tectonics has proven to be as important to the earth sciences as the discovery of the structure of the atom was to physics and chemistry and the theory of evolution was to the life sciences. Even though the theory of plate tectonics is now widely accepted by ... rocks are very young, and they become progressively older away from the ridge crest; (2) the youngest rocks at the ridge crest always have present-day (normal) polarity; (3)stripes of rock parallel to the ridge crest alternated in mag...

• Word Count: 2775
• Approx Pages: 11
• Grade Level: Undergraduate