These are supplementary datasets of Dianto et al. (2026) submitted to Marine Geology. They contain the following datasets: 1) Chronology of cores KDA, KDB, INB, SJ96, HS02, and JZ01, 2) Raw data from the grain size analysis result,  3) Values of L*, a*, b*, and Munsell color chart, and 4), Values of total carbon, nitrogen, and sulfur.and 5) Values of magnetic susceptibility.