The surface is characterized everywhere by hummocks and hollowse 
The hollows, many of them true kettle-holes, are generally smaller 
than those of the pitted plain but much more numerouse The varied 
thickmess of the till and the irregular surface -upon which the mo- 
raine was laid also contributed to the unevenness of the landscape. 
In the area extending a mile or so east and southeast: from Telegraph 
Hill in Sandwich,-hummocks are elongated into rude ridges parallel 
to the telt of the -whole moraine. These may. represert material 
pushed up as a result of minor fluctuations of the ice front. 
At most of its exposures the material in the Sandwich moraine 
is sandy till. A representative pit, on State highway, Route 150, 
opposite the entrance to the Telegraph Hill fire tower, shows. a ten- 
foot thickness of till,. including -a few big anguler blocks, and.a 
few clumps of well-sorted sand such as are encountered occasionally 
in till. They may be the remains of frozen blocks of sard picked up 
by the invading.ice from some outwash or beach deposit and incorpo- 
reted in the till. Hard-packed,.gray.till or "hardpan," which is be- 
lieved to be of the same. age as the loose, sandy till elsevhere in 
the moraine, .is exposed behind the farm at the north end of Gully 
Lane east of Sandwich Village and at a few other placese 
‘ : 
Comparisons and Contrasts with the Buzzards Bay Moraine 
Large erratics are generally less numerous on this moraine than 
on the Buzzards Bay morainee In the region north of Telegraph Hill 
or along Maple Swamp Road near the center of the Sandwich quadrangle 
a-person may travel almost a mile without seeing one. On the other 
Hand, mary areas in the southern part of the mqraine next to the 
Mashpee pitted plain are liberally sprinkled with large blockse 
Along Forest Street, south of West Barnstable and north of Popple 
Bottom Road, northeast of Farmersville, there are many boulders and 
blocks 2 to 20 feet longe The largest single erratic-in this mo- 
raine, exclusive of the area’of overlap on the Buzzards Bay moraine, 
_meay be seen one mile south of Fast Sandwichsit measures approximate- 
ly 30 by.15 ty 10 feet. 
Explanation of the relative scarcity of boulders in this mo~ 
raine mey be found in the types of rock represented. Whereas more 
than 95 per cent of the large erratics in the Buzzards Bay moraine 
are granite or granite gneiss, from 5 to 20 per cent of the larger 
stones in the Sandwich moraine are composed of basalt or other vol- 
canic rocke Granite ,ledzes are notorious for yielding large blocks 
wherever they are crossed by moving ice. We may infer that es it 
approached Cape Cod the lobe of ice that formed the Buzzards Bay mo- 
raine passed over a larger area underlain by granite than did the 
ice that formed the Sandwich moraine. j 
Materials of pebble size, from one to three inches in diameter, 
also indicate a significant difference in the till of the two mo- 
raines. Fragments of bright red, arkosic sandstone and conglomerate, 
finely-lamireted black and white quartzite, and black slate are com- 
morn in the Sandwich moraine,. whereas nore of these rock types is 
found in the Buzzards Bay moraine. Moreover, the identification of 
