~ 48 ~ 
raphy, however, and the number of large blocks scattered over its 
surface indicates that it is at least veneered with, if not com- 
pletely made of till. For the present, therefore, the possibility 
is entertained that this zone may telong-in the Ellisville moraine. 
The hills northeast of Hio Hill are irregular and bouldery, and they 
rise abruptly above the sandy terrain that lies northwest of them. 
They seem to be continuous with and therefore to belong to the mo- 
rainee If this interpretation is correct, the northern margin of 
the moraine continues as a slope that follows for about a.mile the 
trend of Ship Pond Road southeast of Morey Hole. This northward- 
facing slope was formed after the edge of the ice had stood against 
the moraine in this vicinity for some time. As the glacier withdrew, 
the till. in contact with it slumped to form a steep slopee Lack of 
any appreciable gully formation on such a slope is a strong indica- 
tion.that no great interval of time has elapsed since it was: created. 
The lower ground north of the Ellisville moraine in the north 
central part of the Sagamore quadrangle is floored with wellestrati- 
fied sand and gravel. Its surface is pitted, and patches of sandy 
till or slumped gravel occur in the side walls of the kettles. This 
is interpreted as anarea of glacio-fluvial deposits. which were 
spread after the formation of the Ellisville moraine as the’ ice re- 
ceded to some position to the north or northeast. 
From the shore of Cape: Cod Bay at Salt Pond an irregular bluff 
that faces northeast can be traced through Ellisville and Eastland 
Heights to the intersection of Ship Pond Road with Old Sandwich Road 
west. of Hio Hill, At Ellisville this slope lies on the southwest 
side of Old Sandwich Road. Its ‘northwestward trend is interrupted 
by the large kettle that contains .Savery Pond, but the bluff swings 
north across the road at Eastland Heights and then curves’ southwest- 
ward to cross the road again a quarter of a mile south of the end of 
Hio Hill. Compound kettles containing Big Dugway Pond ard Black 
Pond form,deep reentrants in this bluff, but it straightens and be- 
comes prominent: again on the west side of the’ road and continues 
northward to the road intersection. With the exception of Hio Hill, 
the land northeast of this for some distance, lies at generally lower 
altitudes though it is almost morainic in character. The bluff is 
thus a distinct topographic break, much like that along Ship Pond 
Road, and it: probably marks a position of the ice edge during con- 
struction of the Ellisville moraine. There may be justification for 
considering this, in fact, as the northern margin of the moraine. 
Reasons for not doing -so and for including tentatively the lower 
till-covered area northvest of it in the moraine -are given in the 
following paragravhse ; ¢ 
A belt of morainic topography studded: with boulders extends 
northward from Ellisville through Vallersville to the northern 
courdary of the Sagamore quadrangle. It covers an-area from a half 
to three quarters of a mile wide, west of the shoreline of Cape Cod 
Eaye Altitudes in this belt are lower than in the moraine south of 
Ellisville, and the kettles are not as deepe Numerous gravel pits 
in this area show a veneer of sandy till overlying layered’sand and 
gravels; other pits are excavated wholly in sande The till veneer 
