海底堆積物中のテフラ : その認定,記載から分析・同定までの現状と課題(＜特集＞火山噴火史解明のための露頭データベース構築の検討(2))

抄録

Tephra bed occasionally occurs in marine sediment sequence around the volcanic islands such as the Japanese archipelago, and tephra grain is an important component of marine sediments. Spatiao-temporal occurrence and characteristics of marine tephra, however, is not fully understood. This is mainly derived from weak interactions between marine geologists and onshore tephrostratigraphers. Because the deep-sea (pelagic to hemipelagic) muddy sediments have been deposited continuously, collaboration between marine geologists and tephrostratigraphers will give us much more useful information to construct the tephra database.