Figure F21. Downhole distribution of ash layers for Sites 1240, 1239, and 1238, plotted on an age vs. depth profile based on biostratigraphic datums. Length of bars = ash layer thickness. Color shade = time interval of Subunit IB at Site 1240. The map at the bottom indicates the geographical position of the sites.

Figure F21. Downhole distribution of ash layers for Sites 1240, 1239, and 1238, plotted on an age vs. depth profile based on biostratigraphic datums. Length of bars = ash layer thickness. Color shade = time interval of Subunit IB at Site 1240. The map at the bottom indicates the geographical position of the sites.