Meeting of Waters
The Meeting of Waters is the confluence between the dark Rio Negro and the pale sandy-colored Amazon River, referred to as the Solimões River in Brazil upriver of this confluence. For the two rivers' waters run side by side without mixing. It is one of the main tourist attractions of Manaus, Brazil.
This phenomenon is due to the differences in temperature, speed and water density of the two rivers. The Rio Negro flows at near at a temperature of, while the Rio Solimões flows between at a temperature of.
The phenomenon is common in the Amazon and also occurs on a smaller scale in the locations of Santarém and Iquitos.