The Pacific–Farallon Ridge is a former mid-ocean ridge that existed between the Pacific and Farallon plates in the Pacific Ocean during the Tertiary period. Its appearance was in a north-south direction. About 60 million years ago, it might have extended at least 10,000 km (6,214 mi).[1] Remnants of the Pacific–Farallon Ridge include the Explorer, Gorda, Juan de Fuca and the East Pacific ridges.
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