50 



3500 - 

















■ 







3000 













2500 - 







Zm u 



■ 





|2000 - 



Q. 



3 1500 - 

 O 



1000 - 

 500 



n „ 





|es^i 



m 



.•' - 



■ ■""■■ 



• 









200 



400 



600 800 1000 

 Zn (ppm) 



1200 



B 



1000 

 800 



£ 600 



Q. 



a. 

 200 



d- nc ?t> 



\m : 



200 



400 600 800 



Zn (ppm) 



1000 



1200 



Black Rock + New Haven 

 Quinnipiac □ MQR Cores 



Mill River 



Figure 4-5. Zinc and Cu concentrations of MQR sources and core samples: (A) Two lines 

 are estimated slopes for Black Rock (top) and New Haven/Mill/Quinnipiac 

 (bottom) materials; (B) Enlargement of above showing distribution of lower 

 copper values. 



Sediment Core Chemistry Data Summary from the MQR Mound, August and December 1991 



