Most major blackwater rivers are in the Amazon Basin and the Southern United States. The term is used in fluvial studies, geology, geography, ecology, and biology. Not all dark rivers are blackwater in that technical sense. Infused with more than 70 natural trace minerals, the water receives its unique black colour from the blended natural minerals sourced from deep within the Earth's crust, discovered by renowned scientist and member of the Board of A.V. Organics Dr Nobert Chirase from Texas, USA.