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

<p>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>&delta;</em>¹⁸O, <em>&delta;</em>²H and <em>&delta;</em>¹³C) compositions for modern water samples; <em>(ii)</em> physical measurements of one piston core, PC-5; <em>(iii) &delta;</em>¹³C and <em>&delta;</em>¹⁸O values of ostracods collected from PC-5, and <em>(iv) &delta;</em>¹³C and <em>&delta;</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.</p>