12,000 years ago would be the Paleo Period and those artifacts are more Archaic. I believe they have the dates wrong.
A club, a rock, a sling shot, a spear, an arrow...
Archaic culture has to arrive some time ~ so why not 12000 years go BEFORE the Younger Dryas. We know Clovis went into deep decline, but other cultures that’d managed to penetrate all the way to South America didn’t.
I agree on the archaic morphology...