Miocene reef corals from the miura peninsula south central japan

Kadota, M.; Suekane, T.; Kanie, Y.

Science Report of the Yokosuka City Museum 36: 11-18


Accession: 007555308

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We report a new occurrence of Miocene reef corals and discuss their geologic significance in the Miura Peninsula, since Miocene reef limestone have been recorded only from South Fossa-Magna region. The limestone boulders were found in serpentine conglomerate. The fossil assemblages of this limestone suggests tropic to subtropic coral reef environment. The Miocene reef limestones are known mostly in the Izu Peninsula and the Tanzawa Mountains of the South Fossa-Magna on the Philippine Sea Plate side, while the Miura Peninsula is on the Honshu Arc side. Accordingly, the occurrence of the limestone boulders can be explained as follows: The coral reef limestone which had been formed in the southern tropic waters was carried northward accompanying the subsiding around the southern margin of the Honshu Arc with the accretion of Izu Block and/or Tanzawa Block, the limestone blocks have been taken into the serpentine conglomerate.