Iriri River Terra do Meio Ecological Station. The river varies greatly in volume depending on the season, and in the dry season include waterfalls, rocks and rapids. The Iriri River flows through the Tapajós-Xingu moist forests ecoregion. The river is rich in fish, including many species found only here and in the Xingu. Large sections remain unexplored due to its remoteness in a region surrounded by Amazon rainforest, and sections with strong current and cataracts. Iriri River The Iriri River () is a large tributary of the Xingu River in Brazil, in the state of Pará. It is long making it the
South American Championships in Athletics the modern Olympic Games. The 1948 event was held in celebration of the 100th anniversary of the foundation of La Paz. The 1950 event was held in celebration of the 30th anniversary of the Uruguayan Athletics Federation. The 1957 event was for men only. Countries are measured by a points system resulting from their respective athletes' performances. The country with the highest total points is declared the winner. List of South American Championships in Athletics records South American Championships in Athletics The South American Championships in Athletics is a biennial athletics event organized by CONSUDATLE. The first edition in 1919