Biological materials preservation 1 Calcareous biostratigraphy 1 Calcareous nannofossil 1 Calcium carbonate 1 Chubu 1 Deep sea sediment 1 Deep-sea sediments 1 East China Sea 1 Emiliania huxleyi 1 Gifu 1 Glass shard 1 Honshu 1 Japan 1 Kyushu 1 Late Quaternary 1 Major and trace elements 1 Major-element composition 1 Marine isotopic stages 1 North Pacific 1 Oxygen isotopic stratigraphy 1 Pacific Ocean 1 Relative timing 1 Sedimentary sequence 1 Shikoku Stratigraphy 1 Takayama 1 Tephra 1 Tephrostratigraphy 1 Trace elements 1 Trace-element composition 1