岡山縣小田郡稻倉村地方の所謂硯石層群について

廣島大學地學研究報告 1 号 1-14 頁 1951-03-26 発行
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タイトル ( jpn )
岡山縣小田郡稻倉村地方の所謂硯石層群について
タイトル ( eng )
On the Inkstone Group of Inakura-mura District, Oda-gun, Okayama Ptefecturer, Japan
作成者
今村 外治
楠見 久
収録物名
廣島大學地學研究報告
Geological report of the Hiroshima University
1
開始ページ 1
終了ページ 14
抄録
The Inkstone group of Inakura-mura district, Oda-gun, Okayama Prefecture rests unconformably on folded Chichibu PaIaeozoic slate formation and meta-diabase, and is overlaine by rhyolite flow & so-called Neogene Tertiary conglomerate formation with unconformity. The Inkstone group can be divided into 2 formations with disconformity, Upper(Ishizuchiyama red tuff) & Lower, while the latter subdivided into the upper Yamaji shale & the Iower, Nishinotani conglomerate. The general stratigraphy of this district is as follows.
Nishinotani conglomerate & Ishizuchiyama red tuff with no organic remains are characterized by some amount and a large amount of red tuff respectively, while Yamaji shale with no red tuff contains rare plant & abundant fossils as non-marine gastropods, pelecypods and Estherites the last of which is the first discovery in the Inkstone group of Japan. Though palaeontological study on the Inakura fauna has not yet been completed, some types of our Estherites (Estherites cf. kyongsangensis K. & K., E. cf. kyongsangensis var. medialis K. & K. & E. cf. naktongensis K. & K.) are known to be common with those in the Naktong & Silla groups in Korea, but no Naktong-Wakino types of Trigonioides, Plicatounio & Brotiopsis are discovered in Inakura fauna. Nishinotani conglomerate & Yamaji shale will probably correspond to the upper sub-group, while Ishizuchiyama red tuff to the upper sub-group of the Inkstone group in the western Nagato defined by Prof. T. Matsumoto(1948). The Inakura Inkstone group will correspond to the upper part of Naktong group & the lower part of Silla group in Korea.
[Original table is skipped. For more details, please refer to the full text.]

言語
日本語
資源タイプ 紀要論文
出版者
廣島大學理學部地學教室
発行日 1951-03-26
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0073-2303
[NCID] AN00213676