Photic-zone euxinia had a major role in the Devonian-Carboniferous boundary mass extinction

Sampling information and geochemical data of samples at the Longan section (Supplementary Dataset 1), Duli (Supplementary Dataset 2) and Jura Creek (Supplementary Dataset 3) sections.龙岗剖面（补充数据集1）、都里剖面（补充数据集2）与朱拉溪剖面（补充数据集3）的样品采样信息及地球化学数据。