Figure F8. Smectite-illite transition plotted as a function of age and latitude. The transition most likely tracks the paleoposition of the ITCZ because it marks the switch from American dust sources (smectite rich = red) to Asian sources (illite rich = blue). Black dashed line = uncertainty of timing and latitude of transition in Site 1215.

Figure F8. Smectite-illite transition plotted as a function of age and latitude. The transition most likely tracks the paleoposition of the ITCZ because it marks the switch from American dust sources (smectite rich = red) to Asian sources (illite rich = blue). Black dashed line = uncertainty of timing and latitude of transition in Site 1215.