soda lake 
noun
A salt lake with a high content of sodium salts.The lake itself is a soda lake on the floor of the rift valley....
- Lake Manyara National Park spreads between the cliff of the Great Rift Valley and Lake Manyara, a shallow soda lake.
- The soda lake, which is nearly as salty as the Dead Sea, is named for its exquisite pinkness, due to the presence of bacteria that excrete red iron oxide.