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Geography

Why Playa Lakes Exhibit Episodic Flooding and Evaporite Crusts

Quick fact

Some playa lakes flood only a few times per decade, yet each flood can turn hundreds of square kilometers into water—and the resulting evaporite crust can be rich in valuable minerals like lithium, borax, and salt.

Why this is interesting

Imagine a huge lake that appears overnight after a storm, then vanishes within weeks, leaving behind a white, salty crust. How can such a lake exist in the desert?