I 36 SALISB URY AND A TWOOD 



shorter slope having a vertical range of ten to thirty-five feet, and 

 its longer a range ot forty to one hundred feet. This asym- 

 metrical form persists throughout all that portion of the ridge 

 which lies on an inclined surface, the slope of which does not 

 correspond with the direction of the moraine. Where it lies on a 

 flat surface, or an inclined surface the slope of which corresponds 

 in direction with the course of the ridge itself, its cross section 



Fig. 4 Fig. 5 



Fig. 4. Diagrammatic cross section of the marginal ridge as it occurs on the south 

 slope of the Devil's Nose. The slope below, though glaciated, is nearly free from 

 drift. 



Fig. 5. Diagrammatic cross section of the marginal ridge as it appears when its 

 ibase is not a sloping surface. 



is more nearly symmetrical (see Fig. 5). In all essential char- 

 acteristics this' marginal ridge corresponds with the End-Mordne 

 oof the Germans. 



For the sake of bringing out some of its especially signif- 

 icant features, the ridge may be traced in detail, commencing on 

 the south side of the west range. Where the moraine leaves the 

 lowlands south of the Devil's Nose, and begins the ascent of the 

 prominence, the marginal ridge first appears at about the 940- 

 foot contour (^ Fig. 2). Though at first its development is not 

 strong, few rods have been passed before its crest is fifteen to 

 twenty feet above the driftless.area immediately to the north (see 

 Fig. 4) and from forty to one hundred feet above its base to the 

 south, down the slope. In general the ridge becomes more 

 distinct with increasing elevation, and except for two or three 

 narrow post-glacial erosion breaks, is continuous to the very 

 summit at the end of the Nose {b Fig. 2). The ridge in fact 

 constitutes the uppermost forty or forty-five feet of the crest of 

 the Nose, which is the highest point of the west range within the 



