++ 



Cd/AI 



Cr/AI 



Cu/AI 



Pb/AI 



Figure 14. Histogram showing the abundance of metals in the canyon axis and 

 on the slope relative to world average shales (world averages from Krauskopf 

 1967). Samples used in the calculations are the fine fraction (finer than 50 

 microns) of the upper 2 cm at 550-m water depth in the axis of Lydonia Canyon 

 and at the same depth on the adjacent continental slope (Stations 7 and 4 in 

 Bothner and others 1987b). Metal concentrations have been divided by Al to ■ 

 correct for differences in sediment texture. 



46 



