3. The source(s) or point(s) of influx into 

 the Kara Sea of iron and manganese is (are) 

 probably the Siberian rivers which enter the 

 sea from the south. 



4. Factors other than distance from 

 source (s) or point (s) of influx apparently con- 

 trol the distribution of nondetrital manganese 

 in the surface sediments of the Kara Sea. 



5. Nondetrital manganese may be trans- 

 ported farther from its point(s) of influx into 



the Kara Sea than nondetrital iron, or be 

 chemically more stable in the deeper areas of 

 the Kara Sea. 



6. The distribution of nondetrital iron and 

 manganese, and thus color, with depth in Kara 

 Sea cores appears to be controlled by postde- 

 positional processes, including dissolution, mi- 

 gration, and subsequent differential oxidation 

 of reduced iron and manganese ions, rather 

 than by primary depositional processes. 



Acknowledgement 



This study was partially supported from June 1969 to June 1970 by a U.S. Coast Guard 

 cooperative study program. 



References 



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13 



