@article{oai:kumadai.repo.nii.ac.jp:00029864,
 author = {宮縁, 育夫 and Miyabuchi, Yasuo and 渡辺, 一徳 and Watanabe, Kazunori and Okamoto, Shinya and 宮縁, 育夫 and Miyabuchi, Yasuo and 渡辺, 一徳 and Watanabe, Kazunori and 岡本, 真也},
 issue = {2},
 journal = {火山},
 month = {May},
 note = {application/pdf, 論文(Article), Two volcaniclastic deposits-a debris-avalanche deposit (NgDA) and a lahar deposit (NgL) were discoverd alone the Nigorikawa River on the western slope of Aso central cones, southwestern Japan. The Nigorikawa debris-avalanche deposit, having a maximum thickness >3 m, contains numerous plastically deformed debris-avalanche blocks (<3.7 m) of volcanic ash and soil layers in a poorly-sorted silty to clay matrix. The Nigorikawa lahar deposit contains many subangular to subrounded lithic clasts (<0.7 m) and shows clast-supported and matrix-rich depositional structures. We obtained a ^14C age of 2,230±70 years BP from a wood remains (the Yayoi period: 300 BC-300 AD) underlying the debris-avalanche deposit. We obtained a ^14C age of 4,100±60 years BP (2880-2480 cal BC) from a wood fragment in NgL. These ^14C ages indicate that major volcaniclastic flows have inundated the Nigorikawa River multiple times in the past 4,000 years. Although the source and cause of the western part of Aso central cones., https://www.jstage.jst.go.jp/article/kazan/48/2/48_KJ00001053215/_article/-char/ja/},
 pages = {229--234},
 title = {阿蘇中央火口丘群西側斜面で発見された岩屑堆積物とそれらの^14C年代},
 volume = {48},
 year = {2003},
 yomi = {ミヤブチ, ヤスオ and ワタナベ, カズノリ and ミヤブチ, ヤスオ and ワタナベ, カズノリ}
}