Takuyo-Daini
| Takuyo-Daini | |
|---|---|
  Takuyo-Daini Takuyo-Daini (Oceania) Location offshore Japan | |
| Location | |
| Location | Western Pacific Ocean |
| Coordinates | 34°18′N 143°54′E / 34.3°N 143.9°E[1] |
| Geology | |
| Age of rock | Cretaceous |
Takuyo-Daini is a seamount in the Pacific Ocean.
Takuyo-Daini is part of the so-called "Seiko" cluster[2] or the "Geisha Guyots"[3] in the Japanese Seamounts;[4] it lies just west of Takuyo-Daisan seamount with which it forms a pair.[5] Takuyo-Daini rises from a depth of 5,195 metres (17,044 ft) to a minimum depth of 1,420 metres (4,660 ft) and has a regular round shape with a small volume of 2,237 cubic kilometres (537 cu mi).[6] Both seamounts are guyots[4] and together with two other guyots known as Winterer and Isakov have been interpreted as being part of a hotspot track.[7]
The Western Pacific Ocean contains a large number of seamounts which often from clusters or groups. Many of them have flat tops 1–2 kilometres (0.62–1.24 mi) below sea level.[8] A number of these formed during a large-scale volcanic episode in the Albian-Aptian era of the Cretaceous; this includes Takuyo-Daini, where radiometric dating has yielded ages of 118.6 million years ago.[2] At the time of its formation this seamount was located in the central Pacific Ocean.[9] Fossils of rudist bivalves have been found on Takuyo-Daini; the seamount once featured rudist reefs that ceased growing during the Albian.[4] The rudist genera Magallanesia was discovered on Takuyo-Daini and on Cebu in the Philippines.[9]
References
- ^ a b Masalu, DCP (2009). "Delineating the Jurassic to mid cretaceous part of the Pacific apparent polar wander path". Tanzania Journal of Science. 34 (1): 66. doi:10.4314/tjs.v34i1.44290. ISSN 2507-7961.
- ^ a b Haggerty & Premoli Silva 1995, p. 938.
- ^ Christian Smoot, N.; King, Robert E. (March 1997). "The Darwin Rise demise: the western Pacific guyot heights trace the trans-Pacific Mendocino fracture zone". Geomorphology. 18 (3–4): 229. Bibcode:1997Geomo..18..223C. doi:10.1016/S0169-555X(96)00032-3. ISSN 0169-555X.
- ^ a b c Skelton, Peter W.; Sano, Shin-Ichi; Masse, Jean-Pierre (4 April 2013). "Rudist bivalves and the Pacific in the Late Jurassic and Early Cretaceous". Journal of the Geological Society. 170 (3): 523. Bibcode:2013JGSoc.170..513S. doi:10.1144/jgs2012-017. ISSN 0016-7649. S2CID 128739401.
- ^ 和郎, 板東 (25 April 1989). "356 拓洋第二および第三海山の地質". 日本地質学会学術大会講演要旨 (in Japanese). 1989: 477. doi:10.14863/geosocabst.1989.0_477.
- ^ "Takuyo-Daini Guyot". Seamount Catalog. Retrieved 4 December 2018.
- ^ Koppers, Anthony A. P.; Staudigel, Hubert; Pringle, Malcolm S.; Wijbrans, Jan R. (October 2003). "Short-lived and discontinuous intraplate volcanism in the South Pacific: Hot spots or extensional volcanism?". Geochemistry, Geophysics, Geosystems. 4 (10): 23. Bibcode:2003GGG.....4.1089K. doi:10.1029/2003GC000533.
- ^ Haggerty & Premoli Silva 1995, p. 935.
- ^ a b Rao, Xin; Skelton, Peter W.; Sha, Jingeng; Cai, Huawei; Iba, Yasuhiro (1 November 2015). "Mid-Cretaceous rudists (Bivalvia: Hippuritida) from the Langshan Formation, Lhasa block, Tibet". Papers in Palaeontology. 1 (4): 418. doi:10.1002/spp2.1019. ISSN 2056-2802.
Sources
- Haggerty, J.A.; Premoli Silva, I. (December 1995), "Comparison of the Origin and Evolution of Northwest Pacific Guyots Drilled during Leg 144" (PDF), Proceedings of the Ocean Drilling Program, 144 Scientific Results, Proceedings of the Ocean Drilling Program, vol. 144, Ocean Drilling Program, doi:10.2973/odp.proc.sr.144.074.1995, retrieved 4 December 2018