Silicon isotopes data in sponge spicules and radiolarian tests from ODP hole 1051B over the PETM

This dataset contains stable Si isotope values from radiolarian tests and sponge spicules analyzed on MC-ICP-MS and SIMS. These are in association with a study aiming at investigating the changes to the Si cycle during the Paleocene-Eocene Thermal Maximum from siliceous microfossils from ODP hole 1051B.