@article{oai:kumadai.repo.nii.ac.jp:00029871,
 author = {宮縁, 育夫 and Miyabuchi, Yasuo and 増田, 直朗 and Masuda, Naoaki and 渡辺, 一徳 and Watanabe, Kazunori and 宮縁, 育夫 and Miyabuchi, Yasuo and 増田, 直朗 and Masuda, Naoaki and 渡辺, 一徳 and Watanabe, Kazunori},
 issue = {5},
 journal = {火山},
 month = {Oct},
 note = {application/pdf, 論文(Article), The western part of post-caldera central cones of Aso Volcano, southwestern Japan, is characterized by wide chemical variation of lava flows (SiO_2=49-73 wt.%) and complicated topography. Geologic history of the area was reconstructed by stratigraphic relationships between lava flows and airfall tephra layers. Stratigraphy and chronology of lavas and tephra distributed on the western slope of the central cones are as follows: Ayugaerinotaki lava, Matsuhata pumice (MhP), Tochinoki lava (73±10 ka; K-Ar age), Aso central cone pumice 4 (ACP4), Tateno lava, Aso central cone pumice3 (ACP3), Takanoobane lava (51±5 ka), Eboshidake lava, Karisako lava, Akase lava (30 cal ka; calibrated ^14C age), Sawatsuno lava (27±6 ka), Kusasenrigahama pumice (Kpfa; 31 cal ka), Otogase lava and Aso central cone pumice 1 (ACP1; 4cal ka), in ascending order. Between about 70,000 to 50,000 years ago Tochinoki lava, Tateno lava and Takanoobane lava accompanied precursor pumice-fall deposits. A catastrophic eruption occurred in and around the Kusasenrigahama crater at 31 cal ka. The eruption was initiated by the dacite Sawatsuno lava flow and produced the largest plinian  pumice-fall deposit (Kpfa; 1.2km^3 in DRE volume). In the western part of post-caldera central cones of Aso Volcano, total discharge volumes of felsic and mafic magmas from about 70,000 to 30,000 years ago were estimated to be about 2.4km^3 and 0.47km^3, respectively., https://www.jstage.jst.go.jp/article/kazan/49/5/49_KJ00003385905/_article/-char/ja/},
 pages = {267--282},
 title = {溶岩流とテフラとの層序関係からみた阿蘇火山中央火口丘群西部地域の発達史},
 volume = {49},
 year = {2004},
 yomi = {ミヤブチ, ヤスオ and マスダ, ナオアキ and ワタナベ, カズノリ and ミヤブチ, ヤスオ and マスダ, ナオアキ and ワタナベ, カズノリ}
}