Of course it was done before placement. It couldn’t be done after placement. It’s really not hard to carve one shape of a rock to fit another shape of a rock given enough time and patience.
What is so funny to me is that these peoples achieved things like massive irrigation systems that enabled them to feed large populations and complicated textile processing and weaving, but these armchair archaeologists think that the wall is the important thing just because it’s the most prominent feature remaining.
Of course it was done before placement. It couldn’t be done after placement. It’s really not hard to carve one shape of a rock to fit another shape of a rock given enough time and patience.
What is so funny to me is that these peoples achieved things like massive irrigation systems that enabled them to feed large populations and complicated textile processing and weaving, but these armchair archaeologists think that the wall is the important thing just because it’s the most prominent feature remaining.