San Luis belongs partly to the semi-arid pampa region, and partly to the mountainous region of the eastern Andes and Cordoba whose ranges terminate between the 33rd and 34th parallels.
Science and Literature.-Though the university of Cordoba is the oldest but one in South America, it has made no conspicuous contribution to Argentine literature beyond the historical works of its famous rector, Gregorio Funes (1749-1830).
Other small rivers rising in the Cordoba sierras are the Primero and Segundo, which flow into the lagoons of north-east Cordoba, and the Quinto, which flows south-easterly into the lagoons and morasses of southern Cordoba.
The large saline Mar Chiquita, of Cordoba, is fed from the Sierra de Cordoba and has no outlet.
In 1620 Buenos Aires was separated from the authority of the government established at Asuncion, and was made the seat of a government extending over Mendoza, Santa Fe, Entre Rios and Corrientes, but at the same time remained like the government of Paraguay at Asuncion, and that of the province of Tucuman, which had Cordoba as its capital, subject to the authority of the viceroyalty of Peru.
In 1553 an expedition from Peru made their way through the mountain region and founded the city of Santiago del Estero, that of Tucuman in 1565, and that of Cordoba in 1573.
The nomination was brought about by the Cordoba clique, and Roca lacked the moral courage to oppose the decision.
The provinces of Santa Fe, Cordoba and Santiago del Estero are only partially wooded; large areas of plains are intermingled with scrubby forests of algarrobo (Prosopis), quebracho-blanco (Aspido-sperma quebracho), tala (Celtis tala, Sellowiana, acuminata), acacias and other genera.
General Roca was induced to undertake the duties of minister of the interior, and his influence in the provinces was sufficient to check any attempts to stir up disturbances at Cordoba or elsewhere.
The lower terrace of this great mountainous region, with elevations ranging from loon to 1500 ft., is in reality the western margin of the great Argentine plain, and may be traced from Oran (1017 ft.) near the Bolivian frontier southward through Tucuman (1476 ft.), Frias (1129 ft.), Cordoba (1279 ft.), Rio Cuarto (1358 ft.), Paunero (1250 ft.), and thence westward and southward through still unsettled regions to the Rio Negro at the confluence of the Neuquen and Limay.