Pleistocene Geology of Moravia Quadrangle 383 
I 
ranging in altitude from 1240 to 1340 or 1350 feet. This moraine 
I bears southward for a couple of miles and then directly south 
I continuing along the hills east of Dryden in the Dryden quad- 
I rangle. In this distance its upper margin drops about 50 feet 
I in altitude. In texture, so far as revealed in scattered sections, 
! clay predominates, though areas of washed drift are not uncom- 
' mon. The most marked development in this belt is attained 
I nearer the edges of the quadrangle, the thinnest portions being 
found in the segment southeast of Malloryville. In the north 
; part, or near Mud Pond, the belt blends with the kame deposits 
I already referred to, the only distinction being in the texture of the 
II materials; but southward there is no ambiguitj/ as the drift both 
I above and below the band is very thin. 
(^) The great areas of kame moraine in the valley northeast- 
ward from Freeville probably indicate a slow retreat of the ice. 
A lake ponded in the Dryden valley reached into this area; the 
prevalence of the kame drift is partly due to this fact. East of 
McLean there is an extensive flat surface in the valley which sug- 
gests the burial of a stagnant mass of ice;^® this mass was left as 
the high region just north appeared above the ice which afterwards 
fronted in Fall Creek valley. But south of McLean the retreat 
was gradual. At and west of Freeville there is a region of two or 
more square miles from which the ice appears to have withdrawn 
quickly; it is not improbable that a subdued moraine topography 
here may have been modified first by lake deposits and later by 
stream erosion. At any rate, in the valley itself, the first evidence 
of an ice-halt succeeding the loop south of the Junior Republic 
is one-half mile north of Freeville, where the slight development 
of the loop indicates a short halt. 
! iFrom this time on till the glacier had disclosed about four- 
fifths of the sheet the line of its front trended south westward. 
South of the parallel of Locke, the area between the Owasco 
Inlet and Fall Creek valleys is almost continuously buried by 
morainic drift from 20 to over 130 feet thick; there are three small 
outliers on which the drift is thin, hut the surroundings are mo- 
rainic. I was unable to definitely correlate much of this drift 
with halts in the valley south of Groton; the map gives one inter- 
pretation. But the Groton loop is part of a sharply developed 
^‘’^Tarr: Zeitschrift fiir Gletscherkunde, band iii (1908), p, 98. 
