sentences:  The waters of the lake are oligohaline and salinity is often different in one part of the lake from the rest.Sulfate and sodium are the principal salts in the lake water, with chloride and magnesium secondary and calcium, potassium, silica and strontium subordinate.The lake is nourished from the north through two creeks, one originates on Aguas Calientes and the other from two tributaries on Lascar and Cerro del Abra.