About 12,000 years ago, a major river ran from the Sevier Basin to the Great Salt Lake, feeding a wetland delta system and creating riparian habitat along its length. But after three thousand years the river dried up and the surrounding lands became more like what we see today. Because the Old River Bed Delta experienced less environmental and human disturbance than other areas, many of the Paleoarchaic sites found there have remained relatively intact—a rare find in the Great Basin. This book presents a comprehensive synthesis of a decade of investigations conducted by research teams working in different parts of the delta and explores questions about how the old riverbed was formed, how its distributary system changed through time, and how these changes affected early foragers. It concludes with an integrated summary and interpretation. Additional material from this study will be available online at UofUpress.com.