Geochemical and isotopic analyses of a ~14 000 year old sediment core collected from Lake Simcoe, Canada

This dataset contains measurements of modern water and ancient core materials from Lake Simcoe, the fourth largest lake wholly in Ontario, Canada. These data consist of: <em>(i)</em> oxygen, hydrogen and carbon isotope (<em>δ</em>¹⁸O, <em>δ</em>²H and <em>δ</em>¹³C) compositions for modern water samples; <em>(ii)</em> physical measurements of one piston core, PC-5; <em>(iii) δ</em>¹³C and <em>δ</em>¹⁸O values of ostracods collected from PC-5, and <em>(iv) δ</em>¹³C and <em>δ</em>¹⁸O values of ancient DIC and water, respectively, inferred from item <em>(iii)</em>. Physical measurements performed on core PC-5 include magnetic susceptibility, mineralogy and grain size. Mass accumulation rates are also reported.