The Argentine part of the great La Plata plain extends from the Pilcomayo south to the Rio Negro, and from the lower terraces of the Andes eastward to the Uruguay and Atlantic. In the north the plain is known as the Gran Chaco, and includes the country between the Pilcomayo and Salado del Norte and an extensive depression immediately north of the latter river, believed to be the undisturbed bottom of the ancient Pampean sea.
Extensive depressions also are found, some of which are subject to inundations, as along the lower Salado in Buenos Aires and along the lower courses of the Colorado and Negro.
The lower course of the Desaguadero is known as the Salado because of the .brackish character of its water.
The largest of the rivers through which Argentina drains into the Plata system are the Pilcomayo, which rises in Bolivia and flows south-east along the Argentine frontier for about 400 m.; the Bermejo, which rises on the northern frontier and flows south-east into the Paraguay; and the Salado del Norte (called Rio del Juramento in its upper course), which rises on the high mountain slopes of western Salta and flows south-east into the Parana.
Region there are many small streams, flowing into the La Plata estuary and the Atlantic; most of these are unknown by name outside the republic. The largest and only important river is the Salado del Sud, which rises in the north-west corner of the province of Buenos Aires and flows south-east for a distance of 360 m.
On the southern margin of the pampas are the Colorado and Negro, both large, navigable rivers flowing entirely across the republic from the Andes to the Atlantic. Many of the rivers of Argentina, as implied by their names (Salado and Saladillo), are saline or brackish in character, and are of slight use in the pastoral and agricultural industries of the country.
Other river ports, of less importance, are Concordia on the Uruguay river, San Nicolas and Campana on the Parana river, Santa Fe on the Salado, a few miles from the Parana, the city of Parana on the Parana river, and Gualeguay on the Gualeguay river.
In Camaguey province the Jatibonico del Sur; in Oriente the Salado, a branch of the Cauto; in Santa Clara the Sagua la Grande (which is navigable for some 20 m.
There are many rivers and streams, notably the Salado, Pesqueria and Presas, but none is navigable within the state, though many furnish good water power.
The Salado (called Pasage, and Juramento in Salta) crosses the province from N.W.
Its larger Mexican tributaries are the Rio de los Conchos, Salado and Pesqueria.
The Rio Quinto has its sources in these ranges; the Desaguadero, or Salado, forms its western boundary; and the Conlara flows northward among its broken ranges to the great salinas of western Cordoba.
Immediately west of the Guayas river the Estero Salado, which comprises a great many shallow tide-water channels, or bayous, penetrates as far inland as Guayaquil, but is used only by canoes.
In the victory won by the Christians on the banks of the river Salado, near Tarifa, he earned his title of Alphonso the Brave (1340).
Epic poetry in Portugal developed much later than lyric, but the signal victory of the united Christian hosts over the Moors at the battle of the Salado in 1340 gave occasion to an epic by Alphonso Giraldes of which some fragments remain.