
Three Guyana rivers merge into a color-splashed waterway seen from space
A 2023 Landsat-8 image captures the moment when Guyana’s Cuyuni, Mazaruni and Essequibo rivers converge near Bartica to form a large waterway with a striking color split. The lighter Cuyuni carries more suspended sediment, while the Mazaruni and Essequibo are darker due to tannins from vegetation decay; the different densities of the river waters slow mixing at the junction, creating the half-and-half effect that reflects both the country’s geology (the Guiana Shield) and upstream mining impacts.












