- May 2016
Ups, I had forgotten those. I have read something about the “Mound Builders”, I had the idea that this kind of works were built during centuries and were made by several cultures, those cultures didn’t had permanent “settlements”. Not sure. Quite far from my usual readings. But the entry you posted seems to indicate otherwise. Some of those cultures clearly seem to predate the Olmecs.
We also have more recent are the settlements, such the ones of the Pueblo People (Ancestral Puebloans - Wikipedia), and others in that area, such as Sinagua Sinagua - Wikipedia or the ruins in Sonora (+/- 700 years), or Indian Mesa Indian Mesa - Wikipedia
Anyway, the OP was clearly referring to post-Colombian European settlements.