One of the significant findings reported in the 2012 Jenkins et al. paper was the recovery of stone artifacts from contexts contemporaneous with or older than Clovis technology in western North America.

Specifically, the paper reported Western Stemmed projectile points from the Paisley Caves.

Western Stemmed technology is a broad category of stone point production that includes a range of point types with a distinctive design feature: a narrowed stem at the base of the point that facilitates hafting to a wooden or bone shaft.

The stem contrasts with the concave base of Clovis points, which are thinned through the distinctive fluting process, and with other hafting solutions used by contemporary or later cultures.

Western Stemmed technology appears across a wide geographic range in the western United States and has been documented from multiple sites in the Great Basin, the Columbia Plateau, and surrounding regions.