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What is the scientific importance of the Mid-Atlantic Ridge that Tharp discovered?

Largest undersea mountain range
Proof of planetary plate movement
Habitat for a unique ecosystem
Signs of undersea volcanic activity

Answer

Marie Tharp's map of the Mid-Atlantic Ridge showed that the sea floor is not smooth, but instead has a series of ridges and valleys. This was evidence that the Earth's crust is not static, but is constantly moving. This discovery was a major breakthrough in geology and helped to prove Theory of plate tectonics.