Radiolarians and Calcareous Nannofossils from the Uppermost Jurassic and Lower Cretaceous Strata of Japan and Tethyan Regions

Aita, Yoshiaki; Okada, Hisatake

doi:10.2307/1485626

Cited by 50 publications

(32 citation statements)

References 14 publications

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“…That of the Torinosu limestone at the type locality is from latest Kimmeridgian to latest Berriasian (Kakizaki et al, 2012). These estimated depositional periods are well concordant with those based on calcareous nannofossils from latest Jurassic to early Berriasian (Aita and Okada, 1986) and benthic foraminifers from Tithonian to Berriasian (Kobayashi and Vuks, 2006). They are discordant with early Aptian age based on planktonic foraminifers from the Sanchu area (Sashida et al, 1992;Inose and Sashida, 2011) and Middle Jurassic age based on radiolarians from Southern Chichibu Terrane (Sashida et al, 1989;N.…”

Section: Introductionsupporting

confidence: 77%

“…Depositional period of the Torinosu-type limestone has been more precisely dated than done in 1970 s based on the high resolution biostratigraphy of microfossils such as calcareous nannofossils (Aita and Okada, 1986), radiolarians (e.g., Sashida et al, 1989;N. Ishida, 2006), planktonic foraminifers (Sashida et al, 1992;Inose and Sashida, 2011), and benthic foraminifers (Kobayashi and Vuks, 2006).…”

Section: Calibration Of the Torinosu-type Limestonementioning

confidence: 99%

“…The surrounding sandstone and mudstone were determined as Middle Jurassic (Bajocian) to the earliest Cretaceous by ammonoids, bivalves, and brachiopods (e.g., Kimura, 1956;Tamura, 1960Tamura, , 1961a. Radiolarian biostratigraphy since 1980 s has revealed the age of siliciclastic rocks around limestones ranging up to the Berriasian and further to the Barremian (e.g., Yao, 1984;Aita and Okada, 1986;Morino, 1993;Kashiwagi and Yao, 1999;Kozai et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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西南日本の鳥巣型石灰岩ブロックのジュラ紀最後期から白亜紀古世前期有孔虫化石：鳥巣型石灰岩年代決定に関わる制約要素

Kobayashi

Wernli

2013

Jour. Geol. Soc. Japan

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Thirty-six taxa of foraminifers were recognized from samples of the Torinosu-type limestone blocks in South of Yatsushiro, Azamui (Kyushu), Nomura (Shikoku), and Yura (Kii) areas, Southwest Japan. Those identified in species level are confined to five: Nautiloculina broennimanni, Freixialina planispiralis, Charentia cuvillieri, Melathrokerion spirialis, and Pseudocyclammina lituus. Such genera as Kurnubia and Alveosepta showing the pre-Kimmeridgian, and orbitolinids characteristic in the post-late Hauterivian are completely absent in them. The Torinosu-type limestones studied are assigned to the latest Jurassic to earlier Early Cretaceous based on the biostratigraphic distribution of the identified five species in the western Tethyan region and chronologic constraints on the studied material excluding the pre-Kimmeridgian and post-late Hauterivian faunal elements.

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Section: Introductionsupporting

confidence: 77%

Section: Calibration Of the Torinosu-type Limestonementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

西南日本の鳥巣型石灰岩ブロックのジュラ紀最後期から白亜紀古世前期有孔虫化石：鳥巣型石灰岩年代決定に関わる制約要素

Kobayashi

Wernli

2013

Jour. Geol. Soc. Japan

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“…The age of the radiolarian assemblage described here (Table 2) refers to radiolarian biostratigraphic study of Baumgartner et al (1995), Tumanda (1989), Aita and Okada (1986), Sanfilippo & Riedel (1985) and Pessagno (1977). Based on Unitary Assocition (UA) Zones of Baumgartner et al (1995) Table 2.…”

Section: Radiolarian Age Assignmentmentioning

confidence: 99%

“…Based on Unitary Assocition (UA) Zones of Baumgartner et al (1995) Table 2. Biostratigraphic range of certain radiolarians compiled from Baumgartner et al (1995), Tumanda (1989), Aita and Okada (1986), Sanfilippo & Riedel (1985) and Pessagno (1977). The range-chart is based on Baumgartner et al (1995).…”

Section: Radiolarian Age Assignmentmentioning

confidence: 99%