Fig. 4: Annotated images of the BLB5 upper log (object 1033) showing areas of intentional modification.
From: Evidence for the earliest structural use of wood at least 476,000 years ago
From left to right, the ___location of the central notch in profile, shaping marks in and on the margins of the notch (a–k), the notch in profile from the opposite side. The image on the right shows the upper surface of the log, and the three parts of the log (1–3) separated by cracks. White arrows indicate locations of shaping facets on the sides and upper surface of the log.
