High Quality Content by WIKIPEDIA articles! The Pacific–Kula Ridge is a former mid-ocean ridge that existed between the Pacific and Kula plates in the Pacific Ocean during the early Tertiary period. Its appearance was in an east-west direction and the Hawaiian-Emperor seamount chain had its attribution with the ridge. The Kula-Farallon Ridge lay south of the Hawaii hotspot around 80 million years ago, moving northward relative to the hotspot.