Ele Willoughby, PhD<p>Heezen dismissed this as “girl talk” - though really a vital piece of <a href="https://spore.social/tags/PlateTectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PlateTectonics</span></a> puzzle.</p><p> Tharp believed rift was real though she hadn’t convinced Heezen. In 1952, they began working on physiographic maps, which really gave a sense of the geology, & were not US Navy classified, so they could publish. A 2nd project involved plotting earthquakes, & Heezen insisted they work at same scale. Heezen noticed that ocean earthquake epicentre data also formed long lines - 🧵</p>