Lower Cretaceous radiolarian bedded chert from the Mineoka Belt, Boso Peninsula, Japan
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- Ogawa Yujiro OGAWA Yujiro
- Doctoral Program in Earth Evolution Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba
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- Sashida Katsuo SASHIDA Katsuo
- Doctoral Program in Earth Evolution Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba
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著者
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- Ogawa Yujiro OGAWA Yujiro
- Doctoral Program in Earth Evolution Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba
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- Sashida Katsuo SASHIDA Katsuo
- Doctoral Program in Earth Evolution Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba
抄録
A meter-scale, bedded red radiolarian chert block was found on the Yo-oka Beach at the eastern edge of the Mineoka Belt, Boso Peninsula, central Japan. The block is included in the area composed of fragments of the Mineoka ophiolite and other sedimentary and igneous rocks, including a Paleocene to Miocene pelagic limestone/chert sequence. The radiolarian fauna indicates an assemblage zone of middle to late Albian (Early Cretaceous), partly corresponding to the age of the Tethyan fauna. The tectonic significance of this Cretaceous radiolarian chert block is not clear: it could be from either the Mineoka ophiolite and related oceanic plate stratigraphy or from the Shimanto Supergroup.<br>
収録刊行物
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- 地質學雜誌 = THE JOURNAL OF THE GEOLOGICAL SOCIETY OF JAPAN
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地質學雜誌 = THE JOURNAL OF THE GEOLOGICAL SOCIETY OF JAPAN 111(10), 624-627, 2005-10-15
日本地質学会
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