This group of wetlands constitutes a complex association of permanent lentic and
lotic environments (or with a short period of emergence of land on the periphery)
blurred into large areas of interface. Its geomorphologic formative elements are
relatively few: lakes, streams, swamp, embalsados, marsh and some emergent
sandy banks. The most important are lakes of various sizes and characteristics that
are located along the major axis of the basin. These are interconnected with the
marshes through canales and streams to flow finally towards the Río Corriente, the
only drainage area of the system toward the Middle Parana. The proposed site
includes the Lagunas del Iberá of 5500 hectares, one of the most characteristic of the
system. It also includes the surrounding swamps and marshes that flow with no
apparent pattern and become lost in the rest of the macro system