PELAGIC SEDIMENTS 



359 



BERING SEA 



53°N 



SUB- ARCTIC 



TRANSITIONAL 

 AND 

 TEMPERATE 



44°N 



45°S 



50 100% 



Fig. 7. Distribution of diatoms in Pacilic sediments, few selected species 

 (preliminary data from T. Kanaya, unpublished). 



been demonstrated by Riedel (1959), especially in sediments where 

 few other fossils have been preserved. Solution of the opaline 

 remains occurs even within the sediment, however, under some 

 conditions. (See Fig. Sb.) 



Debris from pelagic fish is quite a minor element, but accounts 

 for the relatively high phosphorus content of pelagic sediments. 

 The scales are generally dissolved, but teeth and larger amounts 

 of small skeletal fragments accumulate in the sediment. This 

 m.aterial is of particular interest because of the surprising amounts 

 of certain elements concentrated from the bottom waters. These 



