2024-03-28T11:31:03Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00027995
2022-12-15T03:57:45Z
453:456
503:836:1555:1560
Upper Holocene environmental changes and their geohistorical significance inferred from diatom assemblages from the Tbukigata area of the Echigo Plain, central Japan
珪藻遺骸からみた越後平野,月潟地域における上部完新銃の環境変遷とその地史学的意義
珪藻遺骸からみた越後平野,月潟地域における上部完新銃の環境変遷とその地史学的意義
矢部, 英生
160925
卜部, 厚志
160926
高浜, 信行
160927
Diatom
Echigo Plain
Holocene
Kurotori formation
Shirone formation
Tsukigata
珪藻
越後平野
完新統
黒鳥層
白根層
月潟
Analysis of samples from the uppermost Shirone and Kurotori formations of the Tsukigata area, Echigo Plain has shown them to be rich in diatom floras. The age of the samples was estimated to be about 6300y.B.P. or younger (Upper Holocene). Over 130 diatom taxa were identified, and were divided into nine provisional diatom divisions. Most of the assemblages analyzed were dominated by freshwater species, and their environments were inferred to be marshes, moors and ponds. Two brackish water horizons were also recognized, and their environments were inferred to be estuaries or tidal flats. These last were probably deposited during relatively minor transgressions of the Echigo Plain.
departmental bulletin paper
新潟大学積雪地域災害研究センター
2001-12
application/pdf
新潟大学積雪地域災害研究センター研究年報
23
53
61
新潟大学積雪地域災害研究センター研究年報
AN00183327
03877892
https://niigata-u.repo.nii.ac.jp/record/27995/files/23_53-61.pdf
jpn