The Kula-Farallon Ridge was an ancient mid-ocean ridge that existed between the Kula and Farallon plates in the Pacific Ocean during the Jurassic period. There was a small piece of this ridge off the Pacific Northwest 43 million years ago. The rest of the ridge has since been subducted beneath Alaska.

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (November 2022)

In its early stages of development, the Kula-Farallon Ridge sheared pieces of oceanic rock off the coast of California. When the Kula–Farallon Ridge was in the area where Washington and Oregon are now, basaltic lava erupted there. Some of the basaltic lava is now part of the Olympic Peninsula.

• Hawaiian-Emperor seamount chain
• Meiji Seamount

• The Coast Range Episode (115 to 57 million years ago)

This tectonics article is a stub. You can help Wikipedia by expanding it.

• v
• t
• e

This palaeogeography article is a stub. You can help Wikipedia by expanding it.

• v
• t
• e