Pleistocene Geology of Moravia Quadrangle 
389 
the leeward side of the nunatak. On the other hand, super- 
glacial, and perhaps in some cases subglacial, drainage accounts 
for the accumulation of washed material on the stoss side of some 
nunataks. It has been noted, furthermore, that the drift develop- 
ment in all cases in the area studied is more pronounced on the 
west and southern exposures of nunataks. 
The nunataks from which the preceding general deductions 
have been made are grouped as follows: {a) In the southeastern 
part of the quadrangle a hill rises to an altitude of 1810 feet. 
A study of the slopes of this hill shows on its southern side a quan- 
tity of drift which extends usually below the 1700-foot contour. 
Elsewhere about the hill there is slight evidence of its having con- 
tinued very long as a nunatak. The general relationship of this 
hill to the topography to the east and to the south appears to pre- 
clude any protracted nunatak period. After the ice sheet had 
thinned to the level of this nunatak further decay shortly brought 
above the ice surface, if not beyond its front, the whole region 
of which this hill is a part. 
{b) About a mile northwest of the above area is a fairly isolated 
hill reaching an altitude of 1600 feet. The evidence of drift on 
the flanks of this slope is more pronounced than in the preceding 
case. A variation, however, should be noted here, since the 
association of drift in the region immediately south, where the 
slope drops down to the 1400-foot contour, suggests that a small 
tongue of ice may have continued in the area after the nunatak 
phase of this hill had ceased to exist. The kame and kettle 
development between the 1500-foot contour and the top of the 
hill on its southern slope therefore may not be entirely of nunatak 
origin. Nevertheless, such accumulation of washed drift on the 
southern slopes of nunataks is normal, especially where the body 
of water in which apparently the deposit Was made endured for 
some time. The ultimate outlet of the water that gathered in the 
area under consideration, an ice-walled channel, is indicated by 
the rock cliff and terrace parallel to the highway leading south- 
west along the hill directly west of the nunatak described under 
{a). The base of this cliff is approximately 1500 feet and its upper 
limit cannot be definitely defined now because of post-glacial 
weathering. In any event the evidence of a slight body of water 
held up in this basin between the high areas discussed in this and 
the preceding paragraph is conclusive. 
