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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.

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.

See also

• Hawaiian-Emperor seamount chain
• Meiji Seamount

References

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

v t e Mid-ocean ridges
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Former	Aegir Alpha Antarctic-Phoenix Kula-Farallon Mid-Labrador Osbourn Trough Pacific-Farallon Pacific-Kula
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Ancient oceanic ridges	Aegir Ridge Alpha Ridge Antarctic–Phoenix Ridge Kula–Farallon Ridge Mid-Labrador Ridge Pacific–Farallon Ridge Pacific–Kula Ridge
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• Underwater ridges of the Pacific Ocean
• Historical geology
• Jurassic paleogeography
• Cretaceous paleogeography
• Paleogene paleogeography
• Natural history of North America
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