Yuryaku Seamount
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, all of the Hawaiian-Emperor seamount chain in the North Pacific Ocean.
| Yuryaku Guyot | |
|---|---|
 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. | |
| Location | |
| Group | Emperor seamounts |
| Coordinates | 32°40.20′N 172°16.2′E[1] |
| Geology | |
| Type | Guyot, Hotspot volcano |
| Volcanic arc/chain | Hawaiian-Emperor seamount chain |
| Last eruption | 43 million years ago |
Geology
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, during the Eocene epoch of the Paleogene Period.[3]
References
- "Seamount Catalog". Seamounts database. EarthRef, a National Science Foundation project. Retrieved 2009-04-10.
- 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). The Geological Society of America. pp. 991–998. Retrieved 2009-04-11.CS1 maint: multiple names: authors list (link)
- Seach, John. "Yuryaku Seamount - John Seach". Volcanic database. volcanolive.com. Retrieved 2009-04-11.
