Extended Data Fig. 2: Calio archaeological site.
a, Location of the fossil- and stone artefact-bearing fluviatile pebbly sandstone strata outcropping at the ground surface in an agricultural field; b-d, Archaeological excavations at Calio (2022); e, 3D photogrammetry model of the excavated squares showing the locations of the stone artefacts and dated Celebochoerus fossil (F1) projected onto the stratigraphy (scale bars, 10 mm). Layers 1 to 5b are labelled. The deepest stone artefact excavated at Calio (Artefact 6) was found 56 cm below the ground surface in layer 3b. Agisoft Metashape Professional was used to produce the 3D image and the finds were projected onto this model using ArcGIS Pro.
