One of the activities of the University of New Mexico's 1939 field school at Chaco Canyon was a reconnaissance excavation in the vicinity of Largo Canyon, to the northeast of the Chaco, proper. This was a continuation of the survey and excavations of the past four seasons, as a part of the project for outlining chronologically and geographically the culture known as Gallina. The extent of the Gallina manifestation to the east and south has already been fairly accurately delineated, but its western and northwestern boundaries are unknown. Since the San Juan and Mesa Verde centers lie to the northwest, it was deemed imperative that the cultural connections in that direction be determined. Typical Gallina unit houses are common on the headwaters of the Largo and in the Llegua Canyon area which heads in the same region. The extremely rugged area lying between this district and the San Juan and Mesa Verde region, however, is not only difficult of access, but is practically unknown archaeologically.
Possible sources of archaeological maize found in Chaco Canyon and Aztec Ruin, New Mexico