Here two separate quarries can be seen - one to the right and one to the left. A thin section of rock has been left between them which has a passageway carved through it (which can be seen in the shadows). This might represent the border between two quarries owned by separate people.
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.