Figure 6    Chemical microstratigraphies of Ba in rock varnish of different age, and intersample correlation of Holocene dark layers WH1-WH12 using Ba peaks. The ordinate is the same for all diagrams except (C). Age constraints for (C) and (D) are from Table 2, and those for (A), (B), and (E) are from Figs. 9 and 10.