Selenium enters the soil profile and ground and surface waters through the weathering of bedrock, but even given seleniferous geology, high levels of selenium in soils appears to occur only in localized areas of the great plains and arid west where leaching by groundwater and subsequent evaporation has concentrated selenium salts, either in soils or in surface water bodies receiving selenium-enriched ground water.
(Selenium; enters; the soil profile and ground and surface waters) (surface water bodies; receiving; selenium-enriched ground water) (high levels of selenium in soils; to occur; ) (subsequent evaporation; has concentrated; selenium salts)
Selenium surface water bodies high levels of selenium in soils subsequent evaporation
enters receiving to occur has concentrated
the soil profile and ground and surface waters
selenium-enriched ground water
selenium salts