Two sediment cores: AMD1803-02BC (02BC; water depth: 124 m; location: 76°28.501'N, 78°44.257'W) and AMD1803-01PC (01PC; water depth: 119 m; location: 76°29.355'N, 78°43.501'W) from the southeast of Ellesmere Island (Nunavut, Canada) were collected onboard the Canadian Coast Guard Ship icebreaker Amundsen during the 2018 ArcticNet expedition to document Manson Icefield glacier variability during the Holocene period. The grain size datasets comprising the complete data of grain size analyses at 4 to 5 and 1 cm intervals for core 01PC and 02BC, respectively, performed with a Malvern Mastersizer 2000 of the two cores, the weight percent of sand fractions of core 01PC and the three grain size end-members of the two cores. Physical properties (including bulk density, low field volumetric magnetic susceptibility, spectral reflectance) and chemical (portable X-ray fluorescence or pXRF) measurements were performed at 1 and 0.5 cm intervals for core 01PC and 02BC, respectively, using a GEOTEK Multi-Sensor Core Logger (MSCL). Quantitative X-ray diffraction mineralogy (qXRD) of the <2 mm sediment fraction was studied with an PANanalytical X'pert Powder diffractometer at 4 to 5 and 1 cm intervals for core 01PC and 02BC, respectively.