281 



noticeable. The northwestei'M part especially of Glad Tidings 

 Plain is indented by many beautiful kettles and basins, some of" 

 whicii are i)onds ; but the only well-developed or typical esker, 

 so far as I have observed, connected with this plain, is that 

 skirting the east side of Fulling Mill Pond. This esker 

 formerly terminated on the line of Pleasant Street, but it has 

 been dug away for 50 or 60 feet. Its maximum height is 

 above 40 feet, and it is nearly 2,000 feet long. It is some- 

 what winding, but the general course, as shown on the map, 

 is approximately north -south. Somewhat less than 1,500 feet 

 south from its northerly termination it divides, the western 

 branch following the shore of the pond westward 750 feet 

 farther, with an elevation of 25 feet. 



South of Turkey Hill, the basins of Weir River and Bound 

 Brook are connected by one or more gaps less tiian 60 feet in 

 height through which the water probably passed during the 

 formation of the principal and higher part of Lower Plain 

 (from 50 to 55 feet). But later the overflow appears to have 

 gained the still lower passage north of Turkey Hill, following 

 the present course of the railroad (Weir River Bay being, 

 presumably, occupied by ice) to Cohasset Harbor ; thus 

 explaining the sand deposits along this line and the very typical 

 sandplain of Cohasset Village, Little Harbor being still occu- 

 pied by ice, as indicated by the abrupt slopes of the plain on 

 that side. 



Although Lower Plain is only from 10 to 20 feet lower than 

 Glad Tidings Plain, they are easily distinguished at nearly all 

 points on account of the line of depression whicli separates 

 them. Lower Plain has no important development east of 

 Weir River, but its inland boundary is approximately defined 

 by the valley of this stream and the small tributary stream 

 crossing Main Street north of Free Street and draining 

 Hemlock Swamp, From the north end of this swamp the line 

 passes along Ilobart Street between Great Hill and Pigeon 

 Plain, which we have already recognized as an outlier of Glad 



