Mean major element composition of glass shards from sediment core SO213/2_79-2

All elements calculated on a water-free basis, with H2O by difference from 100%. Mean and standard deviation (+/- 1 sigma) based on n analyses.所有元素均以无水基准进行计算，其中水分（H2O）通过100%减去其余组分的差值求得。平均值与标准偏差（±1σ）基于n次分析结果计算得到。