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Yuryaku Seamount

Yuryaku Guyot
Bathymetric mapping of Yuryaku
Elevation of the Pacific seafloor, showing the Hawaiian-Emperor seamount chain, including Yuryaku Seamount a bit off of the V. The sharp
Elevation of the Pacific seafloor, showing the Hawaiian-Emperor seamount chain, including Yuryaku Seamount a bit off of the V. The sharp "V" separates the Hawaiian Ridge from the older Emperor Seamount portion of the chain. Yuryaku is the center/northernmost and most elongated of the small grouping of three fairly small volcanoes near the bend.
Group Emperor seamounts
Coordinates [1]
Type Guyot, Hotspot volcano
Volcanic arc/chain Hawaiian-Emperor seamount chain
Last eruption 43 million years ago

Yuryaku Seamount (also called Yuryaku Guyot) is a seamount (underwater volcano) and guyot (flat-topped) located northwest of Hawaii. It is located a little southwest of the V-shaped bend separating the Emperor Seamounts from the older Hawaiian islands in the Hawaiian-Emperor seamount chain, in the North Pacific. Alkalic basalt dredged from Yuryaku Seamount is similar to the alkalic basalt that caps the volcanoes in the Hawaiian Islands. Analyses gave a mean age of 42.3 ± 1.6 m.y. for Yuryaku Seamount.[2] The data collected helped show that the age of the Hawaiian-Emperor bend is about 41 to 43 m.y. Alkalic basalt have been sampled at Yuryaku Seamount. The last eruptions of Yuryaku Seamount was 43 million years ago.[3]


  1. ^ "Seamount Catalog". Seamounts database.  
  2. ^ Clague, D.A., Dalrymple, G.B. and Moberly, R. (1975). "Petrography and K-Ar ages of dredged volcanic rocks from the western Hawaiian Ridge and the southern Emperor Seamount Chain". Society of America, Bulletin 86(7).  
  3. ^ Seach, John. "Yuryaku Seamount - John Seach". Volcanic database. Retrieved 2009-04-11. 
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