Unseen test dataset for OM apportionment in the sediments of SLEG

SLEG stations data, each can be fed separately to the trained regression models for prediction of terrestrial OM proportion in sediments.本数据集为SLEG站点数据，各站点数据可单独输入至已训练的回归模型，用于预测沉积物中的陆源有机质（Organic Matter，OM）占比。