comparatively high. 



Chenical history. No previous chemical data are known from this 

 site. The salinity of Halfway Lake represented by the DHES 

 analysis is low for a site in the plains which apparently lacks 

 surface water outflow. Sample collection occurred during high lake 

 stage and may also have reflected the proximity of WET61 to a 

 contributing drainage. 



Sediments. Arsenic, boron, iron, nickel, vanadium and zinc 

 concentrations all rank mid-range among sites of the glaciated 

 plains, but are lower than for most plains sites lacking surface 

 water outflow. The boron concentration exceeds the mean 

 concentration for soils and other surficial materials of the 

 glaciated plains by a small factor; other trace element 

 concentrations analyzed are below the regional mean soil 

 concentrations . 



