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Diatom geochronology of the Miocene Arakawa Formation in the Hiki Hills, Saitama Prefecture, central Japan
Journal of the Japanese Association for Petroleum Technology
Diatom biostratigraphy was applied for the Miocene marine sequence distributed along the Arakawa River in the northern part of the Hiki Hills, central Japan. Five out of 36 collected samples (calcareous nodules) yielded age diagnostic diatom fossils. They were assigned to the lower Denticulopsis lauta Zone (NPD 4 A) between the diatom biohorizons D 41 (15.8Ma) and D 41.5 (15.6Ma). Based on the diatom geochronology, the dated section (Kuroda Section) is correlative to the middle to upper part ofdoi:10.3720/japt.69.65 fatcat:iuboefgwerghjcty66sdvzyq2q