Diatom
Online ISSN : 2186-8565
Print ISSN : 0911-9310
ISSN-L : 0911-9310
秋田県八郎潟干拓地におけるボーリング・コア試料中の珪藻遺骸群集と古環境
工藤 浩三
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ジャーナル フリー

1997 年 13 巻 p. 201-214

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The diatom thanatocoenoses from the bore-hole samples of the lagoon Hachiro-gata r ecl-aimed land were analysed in this paper. The resulsts are as follows.
(1) Identified taxa were estimated with 106 species,17 varieties and 2 formae of 36 genera.
(2) The marine species are dominant in the samples below 41-33m depth. Especially the planktonic species are calculated more than 50 % in this horizon. Also, the brackish water species increases gradually in the middlep art.
(3) The fresh water species are dominant at the uppermost deposit.
(4) The sedimentary environments at the bore-hole site are presumed to be changed from the seawater area to freshwater area through brackish water one toward the uppermost horizon.

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© 日本珪藻学会
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