Journal of Geography (Chigaku Zasshi)
Online ISSN : 1884-0884
Print ISSN : 0022-135X
ISSN-L : 0022-135X
Original Articles
Calibrated 14C Ages of Consolidated Sand Layer, Peat, and Trunk Collected from the Hirota Coast, Southeastern Tanegashima, Kagoshima Prefecture
Kunio OMOTO
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2014 Volume 123 Issue 1 Pages 25-34

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Abstract

 A consolidated and almost horizontally stratified sand layer was exposed east and north of the Hirota site, southeastern Tanegashima after Typhoon 14 struck on September 5-6, 2005. According to previous criteria given to the above-mentioned sediments, they are identified as eolianite. Calibrated 14C age of the sediments indicated 1,670 cal BP with -5.2‰ of δ13C. Judging from the figure for δ13C, the origin of calcium carbonate that consolidated the sand bed seems to have derived from underground water percolating through dune sand. Peat and outer layer of the trunk sample were also collected from downstream along the Hirota River, and their calibrated ages were 530-550 cal BP and 2,070 cal BP, respectively.

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© 2014 Tokyo Geographical Society
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