Fig. 2.

Examples of striae fields created by experimental trampling (see also ref. 17): pit associated with microstriations (A); isolated striae field with straight trajectory (B); isolate striae field with winding trajectory (C); and microstriations emanating from the green fracture edge of a bone specimen (D). The striae fields illustrated in B and C are morphologically indistinguishable from bone surface marks B and C on the DIK-55–2 fossil and mark D on the DIK-55–3 fossil posited to be stone tool scraping and percussion damage. Compare these incidences of bone surface damage to the pit and associated sets of microstriations (arrows) (E) and isolated striae field (F) created by experimental hammerstone. (Scale bars: 1 mm.)