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 rudistbivalves 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]
^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.
