While searching our database we found 1 possible solution for the: River in Brazil that rises on the Mato Grosso plateau before flowing north to the Amazon delta crossword clue. This crossword clue was last seen on 26 August 2022 The The Mirror Quiz Crossword puzzle. The solution we have for River in Brazil that rises on the Mato Grosso plateau before flowing north to the Amazon delta has a total of 5 letters.