Figure F1. Downcore trends in the carbon isotope composition of total dissolved inorganic carbon (δ13CDIC) in interstitial water, Sites U1316, U1317, and U1318. Also indicated are boundaries of major lithostratigraphic units and the depth of the middle Miocene/upper Pliocene unconformity (wavy unit boundaries). VPDB = Vienna Peedee belemnite.