Tercero River
It joins the Saladillo River ( also called the Cuarto River ) to form the Carcarañá River , a tributary of the Paraná River . 
<triplet> Cuarto River <subj> Carcarañá River <obj> mouth of the watercourse <triplet> Carcarañá River <subj> Cuarto River <obj> tributary <subj> Paraná River <obj> mouth of the watercourse <triplet> Paraná River <subj> Carcarañá River <obj> tributary