E 

 o 



11 

 h- 



LU 

 Q 



Q 

 LU 

 CO 











EXCESS 2IOpb, dpm/g 



10 20 30 



40 



10 



A 

 A 

 A 



(§> 



(9) 



15 



20 



A 

 A 



A 

 A ® 

 A ® 



A 



A 



(S) 



® 



(§) 



25 



\ 



(§) 



(§)LYD0NIA CANYON AXIS (627m) 

 ACONTINENTAL SLOPE {630m) 



§) 



SI 



Figure 15. Isotope data suggest active processes in the canyon axis. 



Activity of excess lead-210 with depth in sediment cores from the axis of ^ 

 Lydonia Canyon and from the continental slope (canyon core 4769, 40° 23.87'N, 

 57° 40.13'W; slope core 4772, 40° 09.43'N, 68° 20.12'W). Inventories are 223 

 dpm/g and 86 dpm/g respectively. 



47 - 



