(i) The plains in Brazil are confined to two areas namely the Amazon basin in the north and Paraguay-Parana source region in the southwest.
(ii) Amazon plains lying between the two highlands form the largest plain land of Brazil.
(iii) Amazon plains lying in the northern parts of Brazil generally slope eastwards.
(iv) The Amazon basin is quite wide in the west (about 1300 km) and it narrows eastward. Its width is minimum where the Guyana Highlands and Brazilian Highland come closer. (240 km.)
(v) As the river approaches the Atlantic Ocean, the width of the plains increases.
(vi) These are mostly forested areas and largely inaccessible due to frequent flooding and dense undergrowth. Most of the Amazon plains are covered by tropical rainforests.
(vii) The other plains in Brazil are located to the southwestern part of the highlands. They form the source region of Paraguay and Parana rivers.
(viii) The source region of Paraguay slopes towards the south while the source region of Parana slopes towards the southwest.
(ix) Pantanal is one of the largest wetlands in the world. It lies towards the southwest part of the highland areas. It is a region of swamps and marshes in northwestern part of Mato Grosso Do Sul in Brazil and it extends into Argentina.
