jõe intensiivse looklemise tagajärjel kujunenud lai tasasepõhjaline (tasase lammiga) org, mis on arenenud moldorust ja on jõeorgude arengurea lõppfaasiks, usually a wide valley with gentle slopes and a floodplain at the bottom formed by dominating lateral erosion and the meandering of rivers; evolved from U-shaped valleys