# Bonito Phase

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**Bonito Phase** is an archeological term that refers to the period between 900 and 1140 CE, during which the [Ancestral Puebloans](/source/Ancestral_Puebloans) in the [Chaco Canyon](/source/Chaco_Culture_National_Historical_Park) area constructed numerous [great houses](/source/Great_house_(pueblo)). The system is divided into three parts: the **Early Bonito phase** from 900 to 1040; the **Classic Bonito phase** from 1040 to 1100, and the **Late Bonito phase** from 1100 to 1140. When the system was created in the 1980s, it was thought that construction at [Pueblo Bonito](/source/Pueblo_Bonito) began around 920, but it is now known that building at the great house started almost one hundred years earlier, c. 850.[1]

## References

**Citations**

1. Vivian & Hilpert 2012, p. 72.

**Bibliography**

- Vivian, R. Gwinn & Hilpert, Bruce (2012), *The Chaco Handbook: An Encyclopedic Guide*, 2 ed., University of Utah Press, ISBN 978-1-60781-195-4

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