 Despite their equal proximity, they did not harvest from the Nacimiento Mountains.The selection of timbers from the Chuska and San Mateo ranges, and the avoidance of those from the Nacimiento Mountains, suggests that "regional socioeconomic ties" factored more heavily into timber procurement than "resource depletion with distance and time".Nearly 78 percent of the estimated 26,000 trees harvested for use at Chetro Ketl were felled between 1030 and 1060.