49 



ficaot quautity of them, and they could probably not have failed 

 to contain such , if a great number of icebergs had melted in 

 these parts. 



That the presence of the coarser ingredients in the sam- 

 ples may be due to morainic material is more probable. During 

 the ice-age a number of glaciers may have flowed out from the 

 Liverpool Ryst in various directions, and large ice-streams 

 from Davys Sund and Scores by Sund may have spread 

 over the whole territory herein described. By this means, great 

 variations in the constitution of the loose rooks of the ice-age 

 may very well have been produced, even in adjacent places. It 

 is, however, scarcely probable that these, being so near land 

 could escape being covered over by later deposits. On an open 

 coast like the Liverpool Kyst, a rather considerable amount 

 of erosion must take place, and a corresponding transport of 

 material into the sea, so that it is not at all probable that we 

 should be able to obtain in the samples any material directly 

 connected with the ice-age. 



We must then suppose that at any rale a great proportion 

 of the coarse material has been derived from the rocks of the 

 sea-floor. Even if deposition of the finer ingredients takes place 

 on a comparatively large scale, these rocks will only be covered 

 during very long geological periods, and will always be able 

 by their weathering to provide for a deposition of material in 

 their neighbourhood. This material can have all sizes of grains 

 from the finest clay to the largest pebbles, the size depend- 

 ing on the proximity of the solid rock. It will thus be 

 understood that even adjacent samples may be rather different 

 in their mechanical constitution, where an essential part of 

 their material has this origin. There is however another cir- 

 cumstance which must also be taken into consideration here, 

 viz. the petrographical nature of the coarser ingredients of the 

 sample. If they originate from the solid rocks of the sea-floor 

 each individual sample will have a comparatively homogeneous 

 XXVIII. -4 



