Terraces of Badab-e-Soort are made of travertine, a sedimentary rock formed by the flow of water from two separate mineral springs.
They were formed during the Pleistocene and Pliocene geological periods. The carbon dioxide is released after the water, saturated with calcium carbonate and iron carbonate, reaches the surface. Then the mineral carbonates are deposited.
Iron carbonate and calcium carbonate are separated as soft gels by water, but eventually turn into the hard travertine.
The following photo collection, retrieved from Fars News Agency, tries to draw the viewer’s attention to the process of sediment formation, which creates unique shapes and colors in Badab-e Soort springs.