矢上炭田の研究-1 : 長崎県矢上炭田東長崎町地区の古第三系層序

概要

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The Paleogene strata distributed in the Yagami coal-field, the environs of Nagasaki City, is classified into the following nine formations in descending order : Yagami group (Thickness in meters) Johira formation 30+ Akamatsu formation 180 Tachi formation 120 Koga formation 40 Kirimiya formation 120 Saburaishi formation 30 Isahaya group Keya formation 320 Kakido formation 80 Enoura formation 250+ From the characters of the stratigraphic succession and the molluscan or foraminifereral assemblages, the Isahaya group is correlated with the upper half of the Hondo group in Amakusa and the Yagami group is correlated, with the Iojima group in the Takashima coal-field. Some bio-stratigraphic problems of the Paleogene mega-fossil zone in northern Kyushu is also discussed here.
長崎大学学芸学部の論文
1957-02-28