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タイトル: 奈良盆地のポーリング試料中の大阪層群について
その他のタイトル: Notes on the core samples of the Osaka Group recovered from the Nara Basin
著者: 松岡, 數充
著者(別表記) : Matsuoka, Kazumi
発行日: 1983年 7月
引用: 長崎大学教養部紀要. 自然科学篇. 1983, 24(1), p.23-31
抄録: Since last twenty years, we have clarified the stratigraphy, paleontology and neotectnics of the Osaka Group in the Saho and Nishinara Hills and the eastern part of the Nara Basin. On the contrary, there is little information about correlative strata deposited in the Nara Basin. Several core samples were recovered from these strata at the middle-western area of this basin by Kinki-Noseikyoku. Such plant micro fossils as dinoflagellate cysts, Chlorophyceae, spores, pollen and acritarchs were obtained from these materials. Based on stratigraphical and paleontological evidences obtained from the core samples, the followings are newly added. i) The occurrence of marine dinoflagellate cysts indicates that the strata mainly composed of sand and mud intercalate three marine beds at least. ii) Such characteristic dinoflagellate cyst assemblage as abundance of Polysphaeridium zoharyi (ROSSIGNOL) and presence of Hystrichokolpoma rigaudiae DEFLANDRE & COOKSON suggests that the lower marine bed (-75.0~80.5m) is assigned to Ma-1 Bed distributed on the Saho-Nishinara Hills. iii) The middle and upper marine beds (-42.3~45.2m and -25.0~28.3m respectively) are tentatively correlative with Ma-2 and Ma-3 Beds of the Osaka Group. iv) The lower part of these strata (from -75.0 to -188m) is probably assigned to the lower parts of the Osaka Group.
URI: http://hdl.handle.net/10069/16557
ISSN: 02871319
資料タイプ: Departmental Bulletin Paper
原稿種類: publisher
出現コレクション:第24巻 第1号

引用URI : http://hdl.handle.net/10069/16557



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