But that's not correct, though, and is exactly the kinds of misunderstandings you might expect people to have if they interpret the ages in simplistic, metallurgic = weapons way.
Bronze age cultures did not "wipe out" stone age cultures with their new, fancy bronze weapons. First of all, bronze weapons weren't even a defining feature of the early bronze age, swords not appearing for a good 1500 years, and spear tips being a fairly minor part of what was being developed in bronze. Second, the description seems to imply a period of stone-age cultures sitting around with bad weapons, getting attacked by other cultures who had invented bronze. Rather, those same "stone age" cultures were gradually incorporating bronze-making into their culture.
The bronze age ended with more of a "collapse," but that was due to a huge number of factors, not simply some new culture having invented iron and jumping out from behind some unexplored region of the map, Age of Empires-style.