Prehistoric culture of North America on the eastern side of the Rocky Mountains that is known from stone tools.
It is characterized by leaf-shaped flint projectile points having a concave base with side projections and a longitudinal groove on each face. The complex was first identified at Folsom, N.M., U.S. It includes a variety of scrapers, knives, and blades and is generally dated to 8000–9000 BC. Like the earlier Clovis complex , it is considered to be part of a Paleo-Indian big-game hunting tradition.