Data for Duncanson et al 2026: The upper continental crust contains more marine sediments through time: insights from nitrogen and carbon in Pleistocene tills and ancient glacial diamictites

These data are presented in the Duncanson et al., 2026 manuscript titled "The upper continental crust contains more marine sediments through time: insights from nitrogen and carbon in Pleistocene tills and ancient glacial diamictites." This dataset contains sample data for 70 Pleistocene till samples and 24 glacial diamictite composites. Sample data includes sample location information, nitrogen and carbon concentrations, stable nitrogen and carbon isotope values, major oxide element concentrations, and mineral abundances. This manuscript uses the dataset here to constrain nitrogen and carbon concentrations, and carbon and nitrogen isotopes, of glacial sediments as a proxy for the upper continental crust.