of the Northern Catskill Mountains. 149 



degrees east of south — parallel to the general direction of 

 Schoharie Valley at that point. Farther down the Creek, along 

 the road near the base of the hill one-half mile south of 

 Fultonham, striae were observed pointing south, parallel to 

 the river valley. 



Farther east observations are few. Along the road a little 

 over half a mile south of Medusa (Durham sheet), the striae 

 point about S. 40 W., conforming closely to the direction of the 

 local drumlins and pointing toward the gap in the range near 

 Mt. Pisgah. In the gap through the Catskill Scarp at East 

 Windham the striae point about 25 degrees west of south — 

 parallel in a general way to the valley in which they lie. At 

 the cross roads just below Union Society they point about 

 S. 35 W., roughly toward the gap south of Hensonville. This is 

 rather surprising inasmuch as the moraines farther down the 

 valley, near and beyond Windham, indicate that ice moved 

 down the valley of Batavia Kill rather than at right angles 

 across it as the striae at Union Society seem to show. The 

 moraines may, however, represent either a later phase of the 

 movement, when it was dominated by topography, or merely a 

 lateral lobe protruded down the valley. 



The evidence of the striae indicates that three major lobes of 

 ice invaded this region. One moved south over the plateau 

 west of Potter Hill, another moved up Schoharie Valley, 

 and spread out fan-like from the deep trench of Schoharie 

 Creek ; and a third, an off-shoot of the Hudson Valley lobe, 

 pushed into the mountains through the low passes at and 

 northeast of East Windham, and near Kaaterskill.- As will be 

 shown in the description of the moraines, the southward mov- 

 ing lobe west of Potter Hill was probably the earliest ; 

 the meeting of the other two lobes in the neighorhood of 

 Prattsville has given rise to interesting complications. 



It is probable that within the mountains local glaciers 

 assumed considerable importance, but more detailed studies are 

 necessary before their full extent can be stated. 



Moraines. 



Along the Heachcaters of the West Uranch of the Delaivare. 



Our observations cover only the upper part of the Delaware 

 system. A mile below South Kortright (Hobart Sheet), at 

 the mouth of Pose Brook, is a strong hummocky mass of 

 gravelly moraine. Its relationships, however, whether made 

 by a glacier coming down the valley of Pose Brook, or by one 

 pushing up from the north, have not been determined. Just 

 south of South Kortright in the valley of the Delaware is 

 a strong moraine clearly pointing down the valley. Along 



