The following outline is provided as an overview of and topical guide to the prehistoric people of Colorado, which covers the period of when Native Americans lived in Colorado prior to contact with the Domínguez–Escalante expedition in 1776. People's lifestyles included nomadic hunter-gathering, semi-permanent village dwelling, and residing in pueblos. Periods and peoples Paleo-Indian Paleo-Indian period – the first people who entered, and subsequently inhabited, the Americas during the final glacial episodes of the late Pleistocene period. Evidence suggests big-game hunters crossed the Bering Strait from Asia into North America over a land and ice bridge (Beringia), that existed between 45,000 BCE – 12,000 BCE, following herds of large herbivores far into Alaska. Pre-Clovis – Paleo-Indian hunting, before the use of Clovis points. Lamb Spring in Littleton, with mammoth bones dated 14,140 to 12,140 years ago and hunting by use of stone tools other than Clovis points, is an example. Other examples include Dutton and Selby in the far eastern edge of Colorado. Clovis culture – the oldest Paleo-Indian division, marked by the use of Clovis points, the first fluted projectile points used in North America. Dent, Dutton the Drake Clovis Cache site are examples of Clovis sites in Colorado. The Dent site was the first site to provide evidence that men and mammoth co-existed and that man hunted mammoth. Folsom tradition – as megafauna, like the mammoth, became extinct man adapted by hunting smaller animals with the smaller Folsom projectile point. Examples are the Lindenmeier site, dated 10,600 to 10,720 B.P. and the Jones-Miller Bison Kill Sites. Plano cultures Cody complex – a Plano culture that used unfluted projectile points and other tools like the Folsom and Clovis cultures from about 9,000 to 7,000 B.C. Olsen-Chubbuck Bison Kill Site, Jurgens Site and Lamb Spring are Cody complex sites. Goshen complex / Plainview complex – at the Phillips-Williams Fork Reservoir Site. Hell Gap complex – Plano culture from 10,060 to 9,600 before present (estimated 8,050 to 7,590 B.C.), distinguished by the long stemmed, convex, and unfluted Hell Gap points. Jones-Miller Bison Kill Site is the only Hell Gap location in Colorado. Other Paleo-Indian sites – Canyons of the Ancients National Monument, Picture Canyon, Phillips-Williams Fork Reservoir Site and Roxborough State Park Archaeological District. Archaic period Archaic period – people hunted small game, such as deer, antelope, and rabbits, and gathered wild plants. They moved seasonally to hunting and gathering sites.