This dataset contains the raw data from Thermogravimetric Analaysis (TGA) of samples from 3 different field locations - Warton, Derwent Howe, Harrington. The data was collected in 2022-2023. The data was collected for the purpose of identifying the volume of different carbon-bearing materials (specifically carbonate minerals) in the collected samples. The data was collected by John MacDonald and Robin Hilderman (University of Glasgow) who retain the original data.