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長崎県大村湾南岸,伊木力遺跡周辺の沖積層と海面変化


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Title: 長崎県大村湾南岸,伊木力遺跡周辺の沖積層と海面変化
Other Titles: Holocene marine sediments and sea-level change at the Ikiriki archeological site, southern coast of Oomura Bay, Nagasaki, Japan
Authors: 長岡, 信治 / 横山, 祐典 / 前田, 保夫 / 中田, 正夫 / 奥野, 淳一
Authors (alternative): Nagaoka, Shinji / Yokoyama, Yusuke / Maeda, Yasuo / Nakada, Masao / Okuno, Jun'ichi
Issue Date: 31-May-1995
Publisher: 長崎大学教育学部
Citation: 長崎大学教育学部自然科学研究報告. vol.53, p.27-40; 1995
Abstract: Core boring was performed near the Ikirike early-Jyomon-period site on a small coastal plain facing a closed inner bay, Oomura Bay. The core is 4.73m long, and composed of Holocene marine sandy-to-silty sediments with molluscan and diatom fossil assemblages, which indicate the sediments were formed beneath shallow sea like an inner bay. The 14C dating determines the age, 7620±145yr. B. P., from the peaty silt at the base, -5.9 m.a.s.l., in the core. The diatom flora for this part consists of brackish-water species such as Navicula yarrensis. The altitude of the dated silty sediment shows the earliest sea-level which the Holocene transgression reached in the boring site. According to previous reports, the sea-level is -6m in ca. 7,600 yr. B. P., -1m in ca. 5,900y. B. P., and -0.5 to-0.2m in ca. 5,500 to 5,300 y. B. P. at the Ikiriki site.
URI: http://hdl.handle.net/10069/32176
ISSN: 0386443X
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:No. 53

Citable URI : http://hdl.handle.net/10069/32176

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