Although it is on the eastern fringe of the area occupied by a people known to archaeology as the Fremont, Colorado is nevertheless important in the Fremont story, since clues to their origins and end are found there. Additionally, the presence of…

The Plains Woodland period covers approximately a thousand years of Colorado prehistory across a large portion of the state. Plains Woodland describes the groups of people occupying much of the western plains from present-day Nebraska and Kansas, west of…

Archaeologists use the term Sopris phase to refer to unique Native American sites found only on the Purgatoire River west of Trinidad, Colorado, and on the upper tributaries of the Canadian River west of Raton and Cimarron, New Mexico (Fig. 1). Sopris…

The Formative is the last of several periods in a sequence of cultural development that traces the overall progression from stone-tool-using, hunter- gatherer societies to fully developed agricultural societies. The process that occurred is analogous to…

The Gateway tradition refers to a set of archaeological sites within western Montrose and San Miguel Counties, Colorado, that appear similar to Pueblo II–period (AD 900–1150) sites to the south in the core homeland of the Ancestral Puebloans (Figs. 1 and…