Ridged fields in the Casma Valley on the desert coast of Peru date chiefly to the Late Intermediate Period (circa A. D. 1300 to 1500), although their use might have extended into early colonial times. There are approximately 200 hectares of well
Résultats de fouilles archéologiques, site de Los Gavilanes: système de conservation du maïs au cours du précéramique final (Ancash, province de Casma, district de Huarmey).