﻿49° SMITHSONIAN MISCELLANEOUS COLLECTIONS [ VOL. 47 



have been produced. The melting- about the nose and sides of the 

 glacier concentrates the relatively small amount of dirt enclosed in 

 the ice. This was found to contain about 14 per cent, organic matter, 

 enough to make it dark colored and to give it an offensive odor 

 when set away moist in a warm room. For several years back the 

 glacier has been uncovering a mass of bed-rock upon the west side. 



Fig. 91. — Block-moraine made conjointly by the Illecillewaet and Asulkan glaciers. 

 Strewn with avalanched timber. 



This is a quartz schist with beds of coarse conglomerate and here 

 are to be seen good examples of polishing, scratching, roches 

 moutonnees (fig. 90), lee and stoss phenomena, plucking, chatter- 

 marks, knobs and trails, basins and troughs. 



3. Block Moraines. — Some 1.400 ft. from the present nose of the 

 glacier there extends across the valley an ancient moraine, about 

 400 ft. broad, made up of massive blocks of quartzite. These blocks 

 are blackened with lichens and carry enough soil to support trees 

 of considerable size. A cut spruce with a circumference of 128 cm. 

 gave 243 rings of growth. A hemlock near at hand has a circum- 



