Valle Calchaquí

Valle Calchaquí is the area in Argentina that forms a 250 km narrow north-south strip along the Calchaqui river, between the structural units of La Puna and the Oriental Mountain Range. A bunch of secondary valleys and gorges, both longitudinal and transversal, build up the tributary system of the Calchaqui river. Las Conchas gorge is, in turn, a deep fluvial valley of 75 km long, that spreads from Alemania town to the joint of Calchaqui and Santa Matia rivers.