TRACE METAL FLUXES AT 
JAMESTOWN (/iM m' 2 day"') 
N 
t*J 
<-500 
I^J 
-500 -250 
0 250 500 >500 
+ FLUX —► 
[•) 
-1000 -500 
0 
500 1000 >1000 
I 1 I 1*1 M l*l*l 
1 1 1*1 1 I 1 1 
-50 -25 
0 
(I) 
25 
Jj 
50 
Cu : 
• 
• 
• 
• 
• 
• • 
111M11 
_• • 
• • 
~»i»i 11111111 
-50 -25 0 25 50 
( 2 ) 
Figure 2-4. 
Cd 
I 1 1*1 I l*l*l*l*l 
2.0 - 1.0 
1 *U 1 
0 
1 J 1 1 i I 
1.0 2.0 
Histograms of heavy metal fluxes at Jamestown North 
(units are /uM nr 2 day* 1 ). 
20 
