This report documents the stratigraphy beneath playa lakes and associated lake-margin, playa-basin, and upland settings. Genetic facies interpretation of the observed lithologies was undertaken to better predict the nature of interplaya stratigraphic variation and to extract information about the long-term geologic and paleoclimatic evolution of the area.ABSTRACTPlaya lakes are abundant small ephemeral lakes (generally ~0.5 km in area) that occur in shallow depressions (generally <11 m deep) on the surface of the Southern High Plains.