AMS 14C ages of the speleothem samples from Cola cave.The "dead carbon portion" DCP-corrected 14C ages were calculated based on two different values of dead carbon incorporated in the speleothem (5%, and 10%). The 14C ages were converted to calendar year (calibrated age) using the IntCal13 calibration curve (Reimer et al., 2013). The mean preferred calibrated age is the average of the median probability calculated from the two DCP values. The 1sigma range for the preferred calibrated age represents the largest age interval.