salt production near le grau-du-roi, camargue, france

agricultural agriculture aigues aiguesmortes animal animals bird birds camargue chloride coast coastal colony crystal europe european evaporate evaporating extensive extract extracting flamingo flamingos food france french geological geology grau grauduroi industrial industry lake marine marsh marshes mediterranean midi mineral minerals mining mortes natural nature outdoor outdoors outside pink pond ponds produce producing production roi salin salins salt saltlake saltworks shore sodium spring structure water