Stable isotopes (d18O) of benthic foraminifera from IODP Site 339-U1386

This dataset contains benthic foraminiferal oxygen isotope (δ18O) measurements from Integrated Ocean Drilling Program (IODP) Site U1386 located on the southwestern Iberian margin. Sediment cores were recovered during IODP Expedition 339 aboard the R/V JOIDES Resolution in 2011. The analyzed interval spans approximately 668–1200 ka and was used to establish an oxygen isotope stratigraphy and age model for the Middle Pleistocene section of Site U1386.