Archeology is what's called a historical science. One of the features of that designation is exactly the lack of general reproducibility you've identified. Geol

Archeology is what's called a historical science. One of the features of that designation is exactly the lack of general reproducibility you've identified. Geology (specifically subfields like geomorphology) has many of the same issues even though you've identified it as a scientific field. That said, as someone who's been a practicing archaeologist, I would agree that it's not entirely scientific, but only because the interesting questions in it often aren't answerable in a scientific framework.