Before revision: Bolson, is a geographic term for a desert valley or depression, the level of which has been raised by aggradation, usually draining into a playa or salt pan, and entirely surrounded by hills or mountains.
After revision: View from the International Space Station of Lake Lucero in the Tularosa Basin, an example of a bolson.A bolsonis a desert valley or depression, the level of which has been raised by aggradation, usually draining into a playa or salt pan, and entirely surrounded by hills or mountains.