Pastaza River

river in South America

The Pastaza (formerly known as the Sumatara[1]) is a large tributary to the Marañón River in the northwestern Amazon Basin of South America.[2] It is in Ecuador.


  1. Enock, Charles Reginald (1914) Ecuador: its ancient and modern history, topography and natural resources, industries and social development Charles Scribner's sons, New York, pages 177–178, OCLC 2453173
  2. Ziesler, R. and G.D. Ardizzone, G.D. (1979) "Amazon System" Las Aguas Continentales de America Latina / The Inland Waters of Latin America (COPESCAL Technical Paper No. 1) Fisheries and Aquaculture Department, Food and Agriculture Organization of the United Nations (FAO), Rome, ISBN 92-5-000780-9, in English and Spanish