Pleistocene Geology of Moravia Quadrangle 
387 
out the intervening divide. The fact, however, that this general 
development of the drift covers not only the portion of the quad- 
rangle north of Sempronius but reaches also into the adjacent 
parts of the Skaneateles quadrangle is evidence of a continuous 
hesitancy in the withdrawal of the ice. Furthermore, even in the 
most elevated parts of this region, as the hill northeast of Sem- 
pronius which reaches an altitude of nearly 1800 feet, the drift 
is thick and shows a normal morainal-surface development. In 
these same high levels, the bowlders are large and numerous. It 
is inferred, therefore, that the ice maintained an east-west frontal 
position in this part of the quadrangle for quite a long time. 
(/) The portion of the quadrangle west of the Moravia-Locke 
valley and north of the tributary rising near North Lansing has 
a deep covering of drift; only a small part of this is associated with 
a tongue of ice extending southward into the Moravia valley. 
From the vicinity of the Owasco Hill to the valley of Hollow Brook 
is a band of thickened drift, the general position of which is marked 
by the 1400-foot contour; but towards the southern extremity, 
the band grows broader and reaches even below the 1300-foot 
contour. It is clear that the line of drift thus defined is all of 
the same origin. At the north end, the belt blends into an exten- 
sive plexus of drift knolls and ridges that continue along this west 
slope of the Owasco valley reaching into the quadrangle to the 
north; at its southern end, it blends into extensive accumulations 
that encompass both walls of the Hollow Brook valley, being con- 
tinuous even with the drift which has a marked development at 
Goose Tree and westward. But the continuity of the belt within 
these limits points to a relatively permanent position of the ice-front 
throughout much time. Washed deposits in the form of knolls 
characterize the whole length of this moraine. In this connec- 
tion it may be noted that free ice-front drainage probably existed 
southward through the valley opening out in the vicinity of Locke. 
This moraine does not admit of definite analysis into positions 
correlating with the halts in the valley east of it. The longest 
halt in this upland district is indicated by the moraine which the 
1400-foot contour follows southward for about three miles. It 
is clear that the ice receded very slowly and that it was well bur- 
dened with debris. The loops of drift in the valley north of 
Locke were found to be poorly developed on their western sides 
when attempt was made to trace them into the moraine just 
described. 
