Planktonic foraminiferal biostratigraphy of the Pliocene Kuwae Formation in the Tainai River section, Niigata Prefecture and the age of the base of the No. 3 Globorotalia inflata bed

美智子, 三輪; 幸夫, 柳沢; 桂, 山田; 俊明, 入月; 真弓, 庄司; 裕一郎, 田中

doi:10.3720/japt.69.272

Cited by 18 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned above in the planktonic foraminifera section, the No. 3 G. inflata bed in the Japan Sea is probably a result of the migration of this species from the northern strait, with a northward shift in their distribution on the Pacific side during the warm Pliocene period (Hanagata and Watanabe 2001;Miwa et al 2004aMiwa et al , 2004bKitamura and Kimoto 2006;Hanagata 2007). If this scenario is correct, the occurrence of Krithe spp.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, the occurrence of abundant G. inflata without G. ruber or other Kuroshio indicators in the No. 3 G. inflata bed suggests that the plankton assemblage entered the Japan Sea with temperate water via the northern strait (Hanagata and Watanabe 2001;Miwa et al 2004aMiwa et al , 2004bKitamura and Kimoto 2006;Hanagata 2007). During the Late Pliocene interval corresponding to the No.…”

Section: Planktonic Foraminiferamentioning

confidence: 99%

“…Similarly, the Pulleniatina group, which is characteristic of Kuroshio water, is also absent from the No. 3 G. inflata bed (Miwa et al 2004a(Miwa et al , 2004b. In the northwestern Pacific, G. ruber is a subtropical surface-water species, whereas G. inflata is distributed in temperate to subtropical waters between 20°a nd 40°N, at depths shallower than 200 m (Thompson 1981;Tsuchihashi and Oda 2001).…”

Section: Planktonic Foraminiferamentioning

confidence: 99%

“…Siltstone-mudstone Foraminifera , nannofossil PF7 Upper bathyal (according to the U. subperegrina assemblage) U. subperegrina zone CN13 including datum 10 to 8 of Sato et al (2009Sato et al ( , 1987 Tanihama Siltstone Foraminifera (Watanabe, 1976), diatom (Yanagisawa and Amano 2003) NPD9 (Yanagisawa and Amano 2003) Upper bathyal (according to the U. subperegrina assemblage) U. subperegrina zone (Watanabe, 1976) Nadachi Mudstone Foraminifera (Watanabe, 1976), diatom (Yanagisawa and Amano 2003) NPD8 (Yanagisawa and Amano 2003) Upper bathyal (according to the U. subperegrina assemblage) U. subperegrina zone (Watanabe, 1976) Kuwae Siltstone-sandy siltstone Foraminifera (Miwa et al, 2004a), diatom (Watanabe et al, 2003), nannofossil (Watanabe et al, 2003), Ostracoda (Yamada et al, 2005; PF7 (Miwa et al, 2004a) Lower sublittoral to upper bathyal (Yamada et al 2005) NPD8-NPD9 (Watanabe et al, 2003) …”

Section: Diatomsmentioning

confidence: 99%

“…4 Pliocene and Pleistocene biostratigraphic zones of the microfossil groups in the Japan Sea. Updated correlations of the planktonic foraminiferal zonation in the Japan Sea were illustrated based on Miwa et al (2004a) and Miwa (2014) Dashed lines for zone boundaries in the radiolarian zonation indicate their uncertainty, arising from the probable time lags in key bioevents (Tada et al 2015 Fig. 3 Geological correlations between the on-land sections along the Japanese coastal area.…”

Section: Jeju Islandmentioning

confidence: 99%

See 4 more Smart Citations

Transitional changes in microfossil assemblages in the Japan Sea from the Late Pliocene to Early Pleistocene related to global climatic and local tectonic events

Itaki

2016

Prog. in Earth and Planet. Sci.

View full text Add to dashboard Cite

Many micropaleontological studies based on data from on-land sections, oil wells, and deep-sea drilling cores have provided important information about environmental changes in the Japan Sea that are related to the global climate and the local tectonics of the Japanese Islands. Here, major changes in the microfossil assemblages during the Late Pliocene to Early Pleistocene are reviewed. Late Pliocene (3.5-2.7 Ma) surface-water assemblages were characterized mainly by cold-temperate planktonic flora and fauna (nannofossils, diatoms, radiolarians, and planktonic foraminifera), suggesting that nutrient-rich North Pacific surface waters entered the Japan Sea via northern straits. The common occurrence of Pacific-type deep-water radiolarians during this period also suggests that deep water from the North Pacific entered the Japan Sea via the northern straits, indicating a sill depth >500 m. A weak warm-water influence is recognized along the Japanese coast, suggesting a small inflow of warm water via a southern strait. Nannofossil and sublittoral ostracod assemblages record an abrupt cooling event at 2.75 Ma that correlates with the onset of the Northern Hemisphere glaciation. Subsequently, cold intermediate-and deep-water assemblages of ostracods and radiolarians increased in abundance, suggesting active ventilation and the formation of the Japan Sea Proper Water, associated with a strengthened winter monsoon. Pacific-type deep-water radiolarians also disappeared around 2.75 Ma, which is attributed to the intermittent occurrence of deep anoxic environments and limited migration from the North Pacific, resulting from the near-closure or shallowing of the northern strait by a eustatic fall in sea level and tectonic uplift of northeastern Japan. A notable reduction in primary productivity from 2.3 to 1.3 Ma also suggests that the nutrient supply from the North Pacific was restricted by the near-closure of the northern strait. An increase in the abundance of subtropical surface fauna suggests that the inflow of the Tsushima Warm Current into the Japan Sea via a southern strait began at 1.7 Ma. The opening of the southern strait may have occurred after the subsidence of southwestern Japan.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Planktonic Foraminiferamentioning

confidence: 99%