The "dates" are a tad different, but we can't rule out EARLIER Mayan forays into this area.
It's due East of Arrow Rock Missouri, and West of Arcola WV and Arcola VA.
Not that any of that means anything, but if this place has 1/2 square mile of designated space, that's about 500 arpents.
It could very well have a mix of Mayan AND Spanish settlement patterns, and "artifacts".
Don't believe DeSoto's journal when he said they didn't find gold ~ there's ALWAYS gold associated with Iron Pyrite. That's invariably an iron/nickel meteorite site ~ I'll do some detailed checking tomorrow to see if there's an outline of any early settlement that follows the design required in The Law Of The Indies.
Once a people are exposed to an aspect of a culture that is clearly useful, they can adopt it, and adapt to it, very quickly. For instance, nobody needed to spend much time teaching the Indians of the high plains the usefulness of mustangs before their whole cultures were revolutionized. Though they might have shared many identical aspects of the horse culture of the Mongolian steppe, they never needed to meet a Mongolian.
My two cents.
gold was and is mined throughout this region of nw Ga, se tn. Seems the Maya just a bout will not inhabit an area free of gold. If the site is ever thouroughly excavaated , much gold could be the result. Many of these hillside structures contained caches mined fairly deep into the clif bottoms where food and valuables were store.
The comments at the link are quite contentious!