F. Carney — Form of Outwash Drift. 339 



normal condition then of drift where the lateral moraines of 

 two adjacent lobes unite reveals no special thickening. Where, 

 however, the slope of the divide in question is steepened, and 

 the ice immediately northward is* perhaps more stagnant, or 

 where it contains less debris, then we would anticipate a tend- 

 ency toward the general removal of such debris, and the axis 

 of the slope or divide would have less than the normal veneer 

 of drift. On the other hand, when the axis of the northward 

 slope is more in line with the general deployment of the ice, 

 the chances for the accumulation of drift will certainly be 

 enhanced. It should be noted that the northern part of the 

 longitudinal axis of Bluff Point does trend to the east quite in 

 unison w T ith the direct deployment of ice from the Seneca lake 

 lobe. This being the case then, we have the hypothetical con- 

 ditions favorable to an assemblage of debris in the triangular 

 area. 



There is, however, still a further factor that favors accumula- 

 tion of the drift, which is operative when the divide flattens 

 immediately to the north, a topographic relationship due to the 

 drainage history of the uplands or divide areas between these 

 northward opening troughs. This fact taken in conjunction 

 with the one just mentioned, that is, when the topography 

 favors free movement from the major lobe, thus directing 

 thitherward more active ice with this load of debris, will give 

 us the conditions that account for the peculiar localization of 

 the drift of the area under discussion. 



Description of the Drift in Question. 



A detailed study of this particular interlobate outwash 

 material reveals the following facts : (1) the ice-contact face is 

 not accentuated, that is, there is no cliff or terrace to suggest 

 the speedy withdrawal of the ice from a position of long halt ; 

 (2) the northern part of the accumulation presents a subdued 

 niorainic surface ; (3) rather numerous bowlders may be seen, 

 some of which are the largest noted in the region. To the 

 southward, however, this morainic topography gradually blends 

 into a normal outwash slope. The -control exercised by the 

 falling contours of the rock slopes both east and west, is mani- 

 fest in the expanding outwash when considered in connection 

 with the moraine to which it belongs, and in the gradual falling 

 contours of the outwash, i. e., this development of drift has 

 something of a saddle form. Judged from the surface appear- 

 ance — there is an absence of sections — the outwash material is 

 entirely normal ; there is a blending distally from coarser to 

 finer sediments, with a few bumps suggestive of kame topog- 

 raphy. 



