Table S12.1. Census of individual terrigenous grains in Type B calcareous (marginally hybrid) tempers

Census of individual terrigenous grains in Type B calcareous (marginally hybrid) tempers. Grain types: qtz - quartz plg - feldspar (predominantly plagioclase) cpx - clinopyroxene opa - opaque iron oxides (dominantly magnetite) VRF - volcanic lithic fragments (dominantly felsitic or glassy) cht - chalcedonic chert (possibly from nodules in volcanic rock) tot - total grains counted *Thin sections of ECA-87-5-6 and ECA-87-5-7 mounted jointly. **One grain identified provisionally as volcanic K-feldspar.