What is Pueblo IV Period?

The Pueblo IV Period was the fourth period of ancient pueblo life in the American Southwest. At the end of prior Pueblo III Period, Ancestral Puebloans living in the Colorado and Utah regions abandoned their settlements and migrated south to the Pecos River and Rio Grande valleys. As a result, pueblos in those areas saw a significant increase in total population.

The Pueblo IV Period is similar to the "Regressive Pueblo Period" or, referring to the Ancient Pueblo People of Colorado and Utah, the "Post Pueblo Period." It is preceded by the Pueblo III Period, and is followed by the present Pueblo V Era.