Xingu Indigenous Park film "Xingu" (2012). The idea of creating a park originated with a round table organized by the vice president of Brazil in 1952, at which a much larger park was proposed. However, the state of Mato Grosso began granting land within the proposed area to colonizing companies, so the park that came into existence by decree 50.455 of 14 April 1961 was only a quarter of the proposed size. Adjustments were made on 31 July 1961, 6 August 1968 and 13 July 1971. The final demarcation of the perimeter was made in 1978. The area was given the designation of
Amazon River the northern slope of the valley. The drainage area of the Amazon basin above Óbidos city is about , and, below, only about (around 20%), exclusive of the of the Tocantins basin. The Tocantins River enters the southern portion of the Amazon delta. In the lower reaches of the river, the north bank consists of a series of steep, table-topped hills extending for about from opposite the mouth of the Xingu as far as Monte Alegre. These hills are cut down to a kind of terrace which lies between them and the river. On the south bank, above the Xingu,