Chaco Canyon Architectural and Community Development (c. 850–1150 CE)

1. Pueblo Bonito construction begins at Chaco

   Jan 1, 850Labels: Pueblo Bonito, Chaco Canyon

   • NPS Bonito
   • CRA Bonito

2. Bonito Phase great-house boom accelerates

   Jan 1, 900Labels: Bonito Phase, Chaco communities

   • Bonito Phase
   • NPS Bonito

3. Chetro Ketl construction begins

   Jan 1, 990Labels: Chetro Ketl, Chaco Canyon

   • Chetro Ketl
   • Chetro Ketl FR

4. Pueblo Alto founded on the north mesa

   Jan 1, 1020Labels: Pueblo Alto, North Mesa

   • CRA Alto
   • Pueblo Alto

5. Casa Rinconada great kiva begins mid-11th century

   Jan 1, 1050Labels: Casa Rinconada, Great kiva

   • CRA Rinconada
   • SAH Rinconada

6. Pueblo del Arroyo construction starts near Chaco Wash

   Jan 1, 1060Labels: Pueblo del, Chaco Wash

   • CRA Arroyo
   • NPS Arroyo

7. Chetro Ketl largely completed

   Jan 1, 1075Labels: Chetro Ketl, Chaco construction

   • Chetro Ketl

8. Pueblo Bonito’s long building program continues

   Jan 1, 1100Labels: Pueblo Bonito, Chaco investment

   • NPS Bonito
   • USGS PB dates

9. Kin Kletso built in McElmo style

   Jan 1, 1125Labels: Kin Kletso, McElmo style

   • CRA Kletso
   • Kin Kletso

10. Severe mid-12th-century drought begins affecting the region

    Jan 1, 1135Labels: Mid-12th-century drought, Paleoclimate

    • QSR 2007
    • Chetro Ketl

11. Major Chacoan emigration and system reorganization

    Jan 1, 1140Labels: Chaco emigration, System reorganization

    • Chetro Ketl
    • Pueblo II Crow

12. Pueblo Bonito construction ends around 1150

    Jan 1, 1150Labels: Pueblo Bonito, Construction end

    • NPS Bonito
    • USGS PB dates