[Nellie Wilkerson]

This article sez, “Radiocarbon dating has suggested that these structures were built between roughly 6,500 and 4,500 years ago.”

I don’t understand. How does radiocarbon dating distinguish between the age of the structures and the age of the rock they’re made from?

[LibWhacker]

I’m no expert on this, but my understanding is that carbon-based dating is not used on rocks. Carbon based dating can only go back 50,000 years and is used on the remains of living organisms. To date rocks, geologists have to use elements with much longer half-lives, such as potassium-40, etc.

[Buttons12]

Maybe they found datable stuff on the same level with evidence (tools, stone chips) of megalithic building?

[TXnMA]

Radiocarbon dates are based on carbon-based materials (usually charcoal, sometimes bone, shell, etc.) in the soil under -- or associated with -- the structures -- not the structures or the rocks, themselves.

TXnMA
 

[SunkenCiv]

The RC dating was of bones, tools like antlers and wood items, camp fires, other organic material.