52 0. B. B0GGILD. BOTTOM DEPOSITS. [norw. POL. EXP. 



A comparison of these numbers with those of the bottom samples shows 

 that these are on the whole finer than the four samples of grey deep water 

 deposits, which on an average contained 6"03 % between 005 and 05 mm. and 

 06 % between 05 and 1/0 mm. The finest of these samples (Nrs. Ill and 

 V) are markedly finer than the finest of those from the bottom (No. 10 c); 

 it contains on the whole extremely little sandy material among the clay 

 particles, which fact places it in this respect, nearest to the plastic clays of 

 the tertiary period. It is however scarcely legitimate to infer that it has 

 actually originated from a formation of that age, since it would probably 

 not be difficult to find among alluvial clays some of similar character. In 

 any case it seems unlikely that there can have been any washing out of the 

 clay, during the time it was being transported from its original starting point 

 out on to the ice. 



The mineralogical composition was not investigated in detail; the small 

 proportion of particles over - 5 mm. in Nr. I was found to consist almost 

 always of Algae in fragments, and in some cases of Foraminifera which were 

 very probably occluded by the ice during a period when open water 

 conditions obtained. There were a few particles of conglomerated clay and 

 very few quartz grains. The sandy constituents were almost always 

 wholly quartz ; the quantity is however so small that it is not possible to say 

 whether a separation of the constituents could be accomplished by treatment 

 with fluids of different densities. 



