Gamma-ray data for the late Miocene–Pliocene Kueichulin Formation are obtained from wireline logs of two boreholes drilled in the Taiwan Western Foreland Basin: HYS-1 and TCDP-A. Time-series and astrochronological analyses of the gamma-ray data from both boreholes were used to assess the influence of a rapidly uplift orogen on the preservation of climate oscillations, and identify changes in orbital periodicities preserved in sedimentary archives that reflect different stages of Taiwan orogenesis.