著者

島 誠 永田 武 岡田 昭彦

出版者

日本鉱物科学会

雑誌

岩石鉱物鉱床学会誌 (ISSN:00214825)

巻号頁・発行日

vol.63, no.6, pp.239-247, 1970

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Fine materials (1008489) contains many round shape particles which are almost similar shape and size of cosmic dust. By the chemical composition, they are classified into three groups, 1) Fe-Ni group, 2) Fe, group, and 3) silicate group. The glassy particles composed mainly of silica are thought to be a kind of microtektite which are found on the earth. It is suggested that a part of spherules are extraterrestrial matter.