...Pilot Valley playa are concentrated in three zones: (1) a carbonate zone, (2) a sulfate zone (fig.3), and (3) a chloride zone composed of crystalline halite (the salt crust). Geomorphic differences in the salt crust are caused by differences in their hydrologic environments....

...in three zones: (1) a carbonate zone composed mainly of authigenic clay-size carbonate minerals. (2) a sulfate zone composed mainly of authigenic gypsum,...Flats, but only one type was observed in Pilot Valley, (ieomorphir differences in the salt crust are caused by differences in their hydrologic environments....