How do dry lake beds called playas form on some plateaus?

Playas, or dry lake beds, form in closed interior basins where drainage is internal and evaporation rates consistently exceed water inflow. While plateaus are defined by their flat, elevated topography, they can contain these enclosed basins through various geological processes.1234

The formation of a playa within such a basin typically involves:

• Basin Creation: Tectonic activity, such as faulting or warping, can create the necessary depressions on a plateau or within surrounding terrain. Local cataclysmic events like volcanism or landslides can also disrupt drainage, forming closed basins.3
• Inundation and Sedimentation: During periods of rainfall or surface runoff, water collects in these low-lying areas, forming a temporary lake. As this water sits, it transports and deposits fine-grained sediments, such as clay and silt.512
• Evaporation: Because these basins lack outlets, the water eventually evaporates into the atmosphere. This process leaves behind concentrated salts and minerals, creating the characteristic flat, crusty surface of a playa.1235

Over time, wind action can further shape these features by eroding dried crusts and depositing them as dunes on the leeward side of the basin.36