BOTTOM WATERS 



141 



As regards the chemical composition of the bottom 

 water, Figure 46 shows one of Koczy's most interesting 

 diagrams, based on observations made in the Ro- 

 manche Deep from the "Albatross" in the beginning of 

 July, 1948. The Romanche Deep is a highly curious 

 formation, a kind of deep hole in the ocean floor quite 



7AQ0 



7500 



^ t 

 7592_ 

 Temperatu re Iks I s o "C 



f\iCQiinity Z3 2f0 2.50 milliva l/L 



5a//nii^ JAso 34.7s %o5 



Oxygen 5.i5..z ml/L 



Hydrogen /on 7.^0 I70 7,so 



Phosphates 



51 //cafes 



TurO'd/ti/ 



-4^. 



3.^ 3.5 h 3j ua-afom P/L 



4.0 5.0 



UQ-ahm 5//L 

 60 70 8.0 relative units 



Fig. 46. Changes in water near bottom 



close to the most spectacular part of the Mid-Atlantic 

 Ridge just under the equator, where the ridge, running 

 due east to west, is the narrowest and most jagged. We 

 devoted a few days to this region and obtained a record 

 sounding of over 7,600 meters, or well over 25,000 

 feet, whereas only 10 nautical miles to the southeast 

 of this pit the ridge rises abruptly to about 2,600 meters, 



