Takuyo-Daini
Takuyo-Daini is located in Oceania
Takuyo-Daini
Takuyo-Daini
Takuyo-Daini (Oceania)
Location offshore Japan
Location
LocationWestern Pacific Ocean
Coordinates34°18′N 143°54′E / 34.3°N 143.9°E / 34.3; 143.9[1]
Geology
Age of rockCretaceous

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

  1. ↑ 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.
  2. 1 2 Haggerty & Premoli Silva 1995, p. 938.
  3. ↑ 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.
  4. 1 2 3 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.
  5. ↑ 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.
  6. ↑ "Takuyo-Daini Guyot". Seamount Catalog. Retrieved 4 December 2018.
  7. ↑ 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.
  8. ↑ Haggerty & Premoli Silva 1995, p. 935.
  9. 1 2 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

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