The Ancient Pueblo population—the "Anasazi", from a Ute term adopted by the Navajo denoting the "ancient ones" or "enemy ancestors"—had rapidly expanded by 850: groups resided in larger, denser pueblos.

Strong evidence attests to a canyon-wide turquoise processing and trading industry dating from the tenth century.

Around this time, the first section of Pueblo Bonito is built: a curved row of fifty rooms near its present north wall.

Native beadwork has continued to advance.

Beads are made from hand-ground and filled turquoise, coral, and shell.

Carved wood, animal bones, claws, and teeth are made into beads, which are then sewn onto clothing, or strung into necklaces.

Turquoise is one of the dominant materials of Southwestern Native American jewelry.

Thousands of pieces will be found in the Ancestral Pueblo sites at Chaco Canyon.

Some turquoise mines date back to Precolumbian times, and Ancestral Pueblo peoples trades the turquoise with Middle Americans.

Some turquoise found in southern Arizona dates back to 200 BCE.

The so-called Pueblo Bonito, a large, freestanding, multistoried, six hundred and fifty-room communal dwelling in the Chaco Canyon site of the Anasazi culture, begun around 828 and completed about 1115, is today the largest and best known Great House in Chaco Culture National Historical Park, northern New Mexico.

The Anasazi display apparent astronomical orientations in Casa Rinconada at Chaco Canyon, in New Mexico, where they live until about 1200.

The Ancient Pueblo People or Ancestral Puebloans (the preferred terms for the cultural group of people often known as Anasazi) had developed an advanced culture in the mesa country of northwestern New Mexico around 1000.

The so-called cliff dwellers—a merger of the Basket Maker culture with the Anasazi people—develop magnificent stone cities that cling precipitously to the cliff walls of the deep canyons, probably in response to threats from nomadic tribes of the region from about 1200.