60 



MARINE BOTTOM SAMPLES OF LAST CRUISE OF CARNEGIE 



Table 9. Partial chemical analyses of Carnegie bottom samples--Concluded 



n.d. = not determined: n.f. = none found; 



tr. = trace. ^chemical analyses by Sharp-Schurtz Com- 

 pany, Lancaster, Ohio. "Atlantic samples. For depth and location see table 18. c Except when actual 

 determinations are indicated, this value is calculated from per cent acid sol. CaO on basis of assumption 

 that all of acid sol. CaO represents CaCOs- <1 Determinations by Dr. Parker D. Trask of the Uniteid 

 States Geological Survey. ^Calculated from per cent N; = per cent N x 10. ^ Calculated from per cent 

 N; = per cent N x 19. g Except where indicated, calculated from per cent Na20. When CO2>10 per cent, 

 CI = per cent Na20 x .564. When CO2<10 per cent, CI = per cent Na20 x .273. l^Calculated from per 

 cent CI; = per cent CI x .13. * The errors in analysis are included in per cent H2O = 100.00 -total. 

 J Spectrographic determinations by George Steiger of the United States Geological Survey. '^Determina- 

 tions of radium content by Dr. Charles S. Piggot of the Geophysical Laboratory. m Determinations by 

 Miss Esther C. Allen and Roger Revelle, Scripps Institution. "Per cent CI = per cent Na20 x .564. 

 PPer cent CI = per cent Na20 x .273. 



