Here's why:
* Early Observations: Early explorers like Matthew Fontaine Maury noticed underwater mountains in the Atlantic, but they didn't understand their true nature or significance.
* Early Mapping: In the 1950s, using sonar technology, Bruce Heezen meticulously mapped the ocean floor, revealing a continuous mountain range that ran down the center of the Atlantic Ocean.
* Tharp's Contribution: Marie Tharp, Heezen's colleague, was instrumental in creating the first comprehensive map of the ocean floor. She painstakingly pieced together data from sonar readings, analyzing them and creating detailed charts. She was the first to recognize the continuity of the ridge and its features, like the rift valley running down the center.
* The Rift Valley: Tharp's map showed a deep valley along the crest of the ridge, which Heezen initially dismissed. However, later evidence confirmed Tharp's observation, suggesting a point of separation, which became a key piece of evidence supporting the theory of plate tectonics.
So, while the discovery of underwater mountains can be attributed to early explorers, it was Marie Tharp and Bruce Heezen's meticulous mapping and interpretation that led to the understanding of the mid-ocean ridges as a global system and a vital component of plate tectonic theory.
