[djf]

Not to mention that almost all of the mammoth slayer stories seem to depend on this “cliff” that they somehow force the mammoth over.

I’ve been to the midwest, the Great Plains. There are places there where the nearest “cliff” big enough to stun a mammoth is probably more than 100 miles away!

[muawiyah]

Most of the best theories have the bison running up Scott's Bluff and then jumping off. There are literally HUNDREDS of miles from the Bluff to any other significant hills.

This photo of Scottsbluff is courtesy of TripAdvisor

[SunkenCiv]

:’) Head-Bashed-In was used to kill buffalo, but not to extinguish whole herds simultaneously; such a site used to kill mammoths is (AFAIK) unknown, not just in the Americas.