2026-03-08T03:10:33Z https://kumadai.repo.nii.ac.jp/oai

oai:kumadai.repo.nii.ac.jp:00021644 2026-02-04T07:26:17Z 343:344:345:352

Sedimentary and tectonic evolution of the Upper Jurassic trench-slope basin deposits in the Southern Chichibu Terrane, Outer zone of Southwest Japan 西南日本外帯秩父累帯南帯に分布する上部ジュラ系海溝斜面海盆堆積物の堆積・構造発達過程 セイナン ニホン ガイタイ チチブ ルイタイ ナンタイ ニ ブンプ スル ジョウブ ジュラケイ カイコウ シャメン カイボン タイセキブツ ノ タイセキ コウゾウ ハッタツ カテイ 石田, 直人 イシダ, ナオト Ishida, Naoto 377.5 This study describes lithostratigraphy, biostratigraphy and lithofacies of the Miyazono Formation, which is one of the Upper Jurassic TLBS in the Southern Chichibu Terrane, in the Itsuki-Gokanosho area, western Kyushu. The Miyazono Formation subdivided into three members: Kurekogawa Mudstone Member, Nakamichidani Sandstone Member and Kamiarachi Mudstone Member in ascending order. Conglomerates in the Nakamichidani Sandstone Member contain pebbles of the Torinosu-type limestone and marl. Total thickness of the Miyazono Formation reaches ca. 2600m. The Miyazono Formation covers the Momigi Complex, which is a Middle Jurassic chert-clastic complex regarded as an ancient accretionary prism. The Miyazono Formation yields the radiolarians in the Kilinora spiralis Zone to the Pseudodictyomitra carpatica Zone, and is correlated with lower Upper Jurassic to upper Upper Jurassic (Oxfordian Stage to upper Tithonian Stage). Because the Momigi Complex also includes the Kilinora spiralis Zone, remarkable timegap is not estimated between the Momigi Complex and the Miyazono Formation. 熊本大学 2007-09-19 eng thesis VoR http://hdl.handle.net/2298/9289 https://kumadai.repo.nii.ac.jp/records/21644 乙第25号 博士（理学） 2007-09-19 17401 熊本大学 https://kumadai.repo.nii.ac.jp/record/21644/files/35-0025.pdf application/pdf 9.7 MB 2020-03-02