Its pH is alkaline, with no salinity in its profile.Copalayo (Co) Series - Western salar borderThis series is located to the west of the Centenario and Ratones salars, in the alluvial fans.It has a gently undulating relief with gradients varying from 1% to 10% depending on its position in the geoform that contains it.They are characteristic materials of alluvial fans that cause a granulometric selection, depending on their location in the geoform.