The Amazons State, which capital is Puerto Ayacucho, have an area of 178.095 Km2, and it is located in the Venezuelan Guayana. The base of the shield is constituted for Metamorphic Rocks and Granitics of ancient formation.
This base is suppossed that has it is origin in the Precambric Era and is called Granitic Amazonic.
The Amazonas State is located among Colombia, Brazil and the Bolívar State (Venezuela) and its border are: to the north the Bolívar State, to the west Colombia and to the east and south Brazil.
The relief is classified as low relief and flat. Covered by plains and jungles interrupted for mountains mass, many of them known as “Tepuys”.
At the Amazonas State we can find the following landscape: mountains, tepuys, high plateau, plains, alluvial plains and valleys.
At the north of the State is present a rain fall season that length eight months between April and November, whereas in the south it is not easy to differentiate among a wet season and another dry or less wet.
Almost in the all State are anual temperatures above 28º C. and could be classified as a tropical rain forest without a definited dry season.
The high availability of water given by rain falls contribute to create an extensive and dense hydrographic net, organized in two main river basin: Orinoco and Guainía-Río Negro.
The Amazonas State possess the major hydrographic potential of the country and the Orinoco River is the most important of the area and of Venezuela, which river bed have a approximate length of 960 Km. inside the State. The origin is in the Delgado Chalbaud hill, at the southeast of the State and cross it all around to the northwest area.
Several rivers as the Ocamo, Ventuari, Manapiare, Atabapo, Sipapo, Autana, Cuao, Guayapo, Padamo, Mavaca, Cunucunuma and Cataniapo are importants flowings of the Orinoco river.
The Orinoco river basin embrace almost all the hydrographic system of the country, its area is calculated in 850,000 Km2 approximately, all the surface of Venezuela.