Table 2 (JAS - Wendt and Peters 2023)

Source-related biomarker ratios and predicted families of fourteen oil/seep and artifact samples, Table 2 in "Ancient Olmec tar trade revealed by combined biomarker and chemometric analysis" by Carl J. Wendt and Kenneth E. Peters Table 2. Predicted families of fourteen oil/seep and artifact samples from the study area based on a two-tier SIMCA (soft independent modeling of class analogy) model constructed from the 97-sample training set in Table E1. The five samples from Rancho Orel, Salinas, Bat 2 Ogarrio, PO-22*, PO:23*, and SA:61A* have zero values for predicted family because they lack affinity to the families established by chemometric study of the training set. Asterisks identify archaeological artifacts. Plus signs ‘+’ in the description column identifies samples published previously (Wendt and Lu, 2006).