Comparison of carnivore-induced tooth pits (left column) and air-scribe-induced pits (right column) under SEM.

Notice the rosette-like morphology of the pits depicted on the right. A) Shallow tooth pit with associated microgrooves (faint score) on a bovid long bone; scale bar = 1.0 mm. B) Shallow pit generated by an air-scribe on a fossilized mammalian bone fragment. Notice the sequential, stepwise scalloping that creates flat benches on the various layers of cortical lamellae; scale bar = 1.0 mm. C) tooth pit with raised margins on the left and right sides; scale bar = 1.0 mm. D) Somewhat deeper air-scribe-induced pit (relative to B) on a mammalian fragment; scale bar = 1.0 mm. Inset is interpretive drawing of highlighted area.