provincia (province), northeastern Argentina, bounded by the Parana River (north and west), which forms the border with Paraguay (north), and by the Uruguay River (southeast), which borders Uruguay and Brazil. Its area of 34,054 sq mi (88,199 sq km) forms part of a region known as the Argentine Mesopotamia. Corrientes is a low-lying subtropical province of plains, channels, lakes, and marshes ascending to slightly higher elevations in the east. A dominating feature is the expansive Esteros (marshes) del Ibera in the north centre
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