Fig. S3.

Distribution of δ¹³C (A) and δ¹⁸O (B) values of soil carbonates from fossil hominin-bearing strata at Worano-Mille and from other early to mid Pliocene sedimentary sequences that are associated with hominin fossils. Data from the late Miocene sediments bearing Ardipithecus kadabba fossils are also included for reference. See Datasets S4 and S5 for data and references. In these box plots, median values are marked by a vertical line within the box, the edges of the boxes represent quartile values, the horizontal lines indicate the range, and circles represent either single points (n = 1) or outlier values that are more than 1.5 times the interquartile distance.