Fig. 2
From: Marine tephra in the Japan Sea sediments as a tool for paleoceanography and paleoclimatology
Variability in tephra occurrence in marine cores (the scale bar is 2Â cm). a Tephra patches or spots. b Bioturbated tephra bed. c Fine-grained tephra bed with sharp bottom and top boundaries. d Coarse-grained and pumiceous tephra bed with sharp bottom and top boundaries e Tephra bed composed of lower fine-grained (light), middle pumiceous coarse-grained (black), and upper fine-grained (gray) parts. f Reworked tephra bed including coarse lithic grains