AMS radiocarbon dating of the marine late Pleistocene–Holocene sediment cores from the western Ulleung Basin, East/Japan Sea

We present the results on radiocarbon dating of planktonic foraminifera samples from two piston cores collected from the western part of the Ulleung Basin, East/Japan Sea. Until recently, there were no radiocarbon dates from late Quaternary sediments of this location. Eight samples from the Ulleung Basin cores were accelerator mass spectrometry (AMS) 14C-dated, and reservoir-corrected using R-values as 400 yr. The results indicate that the cores cover the time interval from the middle stage of marine isotope stage (MIS) 3 through last glacial maximum (LGM) to Holocene, and the average sedimentation rate of the cores vary from 17.61 cm/kyr to 19.96 cm/kyr. Particularly, it is shown using the calibrated 14C data that in the cores hemipelagic muds (bioturbated and slightly laminated mud facies) were mainly formed during interglacial periods (MIS 1/3), whereas non-hemipelagic muds (laminated and homogenous mud facies) were deposited during glacial period (MIS 2).