Pace 



10. Percent nondetrital manganese in surface sediments 



(linear trend surface) 25 



11. Nondetrital Mn/Fe ratio in surface sediments 



(linear trend surface) 26 



Tables 



Table Page 



1. Profile of a typical core from the Kara Sea 27 



2. Percent of major clay groups and peak area ratios for 



cores E-26 and E-21 27 



3. Means and standard deviations for nondetrital iron, man- 



ganese, and Mn/Fe ratio in the surface sediments for 



each deeper extractable iron, manganese, and Mn/Fe 



ratio in the surface sediments of the southwestern 



Kara Sea 27 



4. Distribution of manganese and iron oxides in secondary 



microzonal profile of mud from Lake Valk-Yarvi 28 



5. Station positions and water depths for Northwind (1965) 



sediment samples 28 



6. Station positions and water depths for Edisto-Eastwind 



(1967) sediment samples 28 



7. Core descriptions (E-Series) 29 



8. Gravel, sand, silt and clay percentages 32 



9. Textural parameters 32 



10. X-ray diffraction data for black crusts from core E-26, 



3-7 cm and for brown earthy material from core 



E-26, 7-10 cm 33 



11. Comparison of X-ray data for pellets separated from core 



E-31, 20-23 cm, with data for the mineral vivianite 34 



12. Distribution of nondetrital iron and manganese in core E-26 ^ . 34 



13. Distribution of nondetrital iron and manganese in 



core N-148 35 



14. Nondetrital iron and manganese in surface sediments 35 



15. HCI-extractable iron and manganese in surface sediments 



of southwestern Kara Sea 36 



VI 



