Fig. 7. In northern road-location studies, where routes must oftentimes traverse rugged 
Precambrian bedrock terrain, the airphoto interpreter not only attempts to avoid undesirable 
terrain - here exposed rugged bedrock (R) and deep muskeg (M) - he also attempts to follow 
glaciofluvial deposits wherever possible - here indicated by E (esker), D (esker-delta), K 
(kames), O (valley outwash). Kettleholes (KH) are filled with water. 
Fig. 8. Shallow well-defined coarse gravelly to cobbly terraces are indicated by arrows.