31405513Pre-Columbian Plateau North American periodsPT2026-03-30 20:48:58UF31405514Pre-Columbian Plateau North American periodNDUF31405515periods, Pre-Columbian Plateau North AmericanNDBT31365229Pre-Columbian Western North American periodsPTNT31433657Early period PlateauPTNT31433659Transitional period PlateauPTNT31433661Middle period PlateauPTNT31433664Late period PlateauPT