Reveals fluctuations in the water-column chemistry ranging from fresh to hypersaline. Fresh water dominated the first two-thirds of the lake's history while hypersalinity dominated the final stages. Salinity changes are identified by variations in calcite-dolomite ratio, tuff bed mineralogy (authigenic analcime, K-feldspar, and clay minerals), and paleontology. These data are interpreted as
... [Show full abstract] representing a lake fluctuating from fresh to hypersaline, with stages controlled by sudden freshwater expansions of the lake followed by more gradual regressions. -from Author