SHORE NOTCHES IX DRUMLINS. 643 



earned out south from the nucleus of till with an anticlinal stmcture like 

 a nest of inverted canoes, a type repeated in connecticjn with all the other 

 isolated drumlins farther south. 



At first the axis of the bar seems to have been shifted now to the right 

 and now to the left, only part of the deposit of each position being- retained 

 permanently. Then the layers are continuous, flat on the top for 30 to 50 

 feet, and dip east and west. On the west side it was built up with easier 

 slope and finer material, as the bar w^as being- can-ied south across the some- 

 what land-locked bay south of CoUeg-e Hill, where it opened eastward 

 into the East Street lake, and the main current, sweeping down the East 

 Sti-eet channel, not yet closed on the north, wore a deep fluting- into the 

 east side of the di-umlin and carried the material south in great sheets of 

 coarse gravel, often 3 to 8 feet thick, to form the eastern slopes of the canoe- 

 shaped layers, while, if we follow these sheets over to then- Avesteni slopes, 

 we find them made up of much finer sand, at times slightly gi-avelly. At 

 the bottom of the western slopes the sheets run west horizontall}' for a little 

 distance and then mount up gradually onto fiine clays, which latter in tm-n 

 sink with slight dip eastwardly beneath the sands and below the level of the 

 cutting. Tliis shows that the water stood at this high level for a long time, 

 allowing the fine clays to accumulate (which happened at a higher level in 

 tliis sheltered bay than in the deep East Street basin), before the bar was 

 pushed south over them. 



The village of South Amherst is built on such a l)ar can-ied as a ridge 

 from one cb-umlin to another, and the road running south from the village 

 keeps on the bench around the east side of the great drumlin south of the 

 village, and follows the bar that projects southwardly from it to join the 

 high ten-ace at the "Bay road" along the northern flank of Holyoke. 



South of College Hill is a deep depression, just mentioned, sheltered 

 on all sides by cb-ift hills, and never filled up, and another, much more 

 extensive, lies west of the -v-illage of South Amherst. 



On the decline of the waters a stream draining the East Street lake 

 found its way between drift hills into the fii'st, and from this into the second, 

 of these partially isolated bodies of water, and thi-ough the western line of 

 di-ift hills into the main basin, and cut its way down through the drift so 

 slowly that separate ten-aces were fonned around the East Street lake, 

 where the streams entered it from the Pelham Hills. Ultimately these 



