Figure 1

Variability of carbonate components in Lake Van with respective δ18O and δ13C isotope range. Note the high variability in δ18O and δ13C values between each carbonate phase. The additional references provide further information on the isotopic composition and environmental context of the individual carbonate components. SEM images of aragonite, low-Mg calcite and dolomite are from McCormack et al.14, images of ostracod valves are from McCormack et al.31.