The main mouth of the Amazon lies in which country?
Exploration of the Valley of the Amazon volumes, one written by Lieutenant Herndon and the other by Lieutenant Gibbon, were so unusual at that time and of such importance that in an unusual move, it was immediately ordered, "10,000 additional copies be printed for the use of the Senate." Three months later another 20,000 copies were ordered; the book became an international best-seller. Their orders were to report on all possible conditions in the Amazon region that they would each have to traverse alone from Lima, Peru on the Pacific coast to Para, Brazil, the mouth of the Amazon. The two volumes were published by presidential order.
Source of the Amazon River the Mantaro. Explorers and scholars have identified each of the three rivers as being the source of the Amazon under one of the three definitions. The Mantaro is the most distant upstream point; the Maraňón is the main stem of the Amazon; and the Apurímac is the most distant source with an uninterrupted flow of water. The Amazon River is the largest river in the world in terms of its discharge into the Atlantic Ocean and either the longest or second longest river in the world, contending with the Nile River for that honor. More than from its mouth, upstream