Geological and Petrological Studies of the "Shirasu" in South Kyushu, Japan Part VIII : The "Shirasu" in the Nojiri District, Miyazaki Prefecture, and the Significance of the "Older Pumice Flow" - Collections

＜departmental bulletin paper＞
Geological and Petrological Studies of the "Shirasu" in South Kyushu, Japan Part VIII : The "Shirasu" in the Nojiri District, Miyazaki Prefecture, and the Significance of the "Older Pumice Flow"

Creator	Creator Name Taneda, Sadakatu 種子田, 定勝タネダ, サダカツ Creator Alternative Name Taneda, Sadakatsu Affiliation Affiliation Name Faculty of Science, Kyushu University 九州大学理学部
Language	English
Publisher	Faculty of Science, Kyushu University
Publisher	九州大学理学部
Date	1975-11-25
Source Title	Memoirs of the Faculty of Science, Kyūsyū University. Series D, Geology
Vol	23
Issue	2
First Page	295
Last Page	301
Publication Type	Version of Record
Access Rights	open access
Crossref DOI	https://doi.org/10.5109/1544177
Abstract	The geology and lithological and petrographical properties of the "Shirasu" in the northeastern part of the Aira volcanic region are described briefly in this paper. The refractive indices of the glas...s are 1.497-1.501, the chemical compositions of the pumice fragments are SiO_2 73, and the "median diameters" (Md) obtained by mechanical analysis (excluding large fragments > 4 mm) are 0.16-0.28mm. It is noticed that the "older pumice flow" differs from the "Shirasu" in distribution, contour lines for Md and petrographic properties, and its eruptive center seems to be found in the northern part of the Kirishima volcano.show more

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