This dataset contains the processed and raw data belonging to the organic geochemical analyses on cysts of the dinoflagellate Thalassiphora pelagica in sample 18H 17W 55-57 cm from IODP Leg 120 Site 748B (58°26.45'S, 78°58.89'E). The GC/MS files are in NetCDF format, the raw micro-FTIR data in Bruker-Opus format. The processed micro-FTIR data are in ASCII Format.

Supplement to: Versteegh, Gerard J M; Houben, Alexander J P; Zonneveld, Karin A F (in review): Better molecular preservation of organic matter in an oxic than in a sulphidic depositional environment: evidence from of Thalassiphora pelagica (Dinoflagellata, Eocene) cysts. Biogeosciences Discussions