Geological age of the Sashida Limestone in south Izu region, Japan based on microfossils : New knowledge about the geohistory of the Izu Peninsula （Part 1）

• Main Authors: 松丸, 国照, マツマル, クニテル, 八木, 正彦
• Format: Other/Unknown Material
• Language: English; Japanese
• Published: 2022
• Subjects: Sashida Limestone; Izu Peninsula; larger and planktonic foraminifera; Late Cretaceous; Paleocene; late Middle-Late Eocene; Early Oligocene-early Early Miocene; Letter Stage; Izu landmass; Planktonic foraminifera
• Online Access: https://sucra.repo.nii.ac.jp/record/2000003/files/A3000473.pdf

The late Cretaceous, Paleocene, late Middle to Late Eocene, Oligocene and early Early Miocene larger（ benthonic） and planktonic foraminifera were conrmed for the rst time, in addition to Early-Middle Miocene larger foraminifera, from the Sashida Limestone included basalt pebbles beside the outcrop, which was covered by riverconstruction, and near there, Sashida, Kamo-Gun, south Izu Peninsula, Japan. The Sashida Limestone consists of clastic carbonate rocks of various ages from the late Cretaceous through early Early Miocene to late Miocene or early Pliocene. From the research conclusion, the geology and geohistory of the Cretaceous-Paleogene Shimanto Group and Paleogene Setogawa Group along the Pacic Ocean as the pre-Yugashima Group, and the locus of lateral mobility of the Izu landmass of the antecedent of the Izu Peninsula were indicated as further research. ©2022 JAPT 発行元の許可を得て掲載しています。 text application/pdf journal article