A point chiselled guideline runs across the rock-face between the wedge holes. This looks like it was probably done to assist in the laying out of the wedge holes.
The wedge holes have been cut but since there is no split in the rock it appears that work was abandoned before the wedges were employed. Since these wedge holes are large and rectangular and do not appear to be carved to a point they might have been made for wooden wedges rather than metal ones.
Notes
This is one of the more than seventy individual extraction points which constitute the so-called City Quarries at Aphrodisias, located roughly 2 km north of the city. White and grey marbles were quarried in this area.