Here we present measurements of Polycyclic Aromatic Hydrocarbons (PAHs) , from the mid-Cretaceous layer in drill core 9R and 10R at MARUM-MeBo70 Site PS104_20-2 (73.57°S, 107.09°W; 946 m water depth) for reconstructing past wildfire activity and vegetation near the South Pole. The site is located within the Pine Island cross-shelf trough in the Amundsen Sea Embayment (ASE), West Antarctica and was drilled during RV Polarstern Expedition PS104 in 2017. The presence of PAHs is indicative of the incomplete combustion of organic matter and frequently used to trace the occurrence of wildfires in the geological record. The aromatic fractions, containing PAHs, were analysed using a Thermo Scientific Trace 1310 gas chromatograph coupled to a Thermo Fisher TSQ 8000 Evo single quadrupole mass spectrometer. Samples were injected on-column on a Phenomenex DB-5MS (25 m × 0.25 mm i.d., 0.25 µm film thickness). Helium was used as carrier gas. The oven program was as follows: 60 °C (held 3 min), ramped to 310 °C at 3 °C/min and then held isothermal for 20 min. The mass spectrometer was operated at an electron energy of 70 eV and scanning m/z 50-800 with a scan time of 1.0s.