624 H. L. FAIRCHILD POST-GLACIAL UPLIFT OF NEW ENGLAND 



N'orthwest of Foxboro is a plain contoured up to 300 feet. Above that 

 level is a heavy, nnalfected moraine, the limit of wave-work being fairly 

 clear. Going west toward Wrentham the surfaces below 300 feet are 

 water-laid materials, with several gravel pits. The morainal ridge 

 crossed by the electric railway shows wave erosion at 300 feet, with 

 numerous boulders. 



West of Wrentham village is an extensive kame area, leveled by waves, 

 which includes Archers Pond and Lake Pearl (Whiting Pond of the 

 map). The amusement gTOund, called "Lake Clear /^ is between the two 

 lakes and on a kettled plain at about 250 feet. Northwest of Lake Pearl 

 the surface is kamy and unleveled, but approaching Franklin the sur- 

 faces at 260 to 280 feet are smoothed; but a mass at over 300 feet is 

 unaffected moraine. 



Southeast of Foxboro, toward Mansfield, the inferior plains are 280 

 to 200 feet, the village being on a plain at 180 feet. 



SOUTHEASTERN LOWLANDS 



Southeast of the Blue Hill Eange and the summit plains of Sharon- 

 Foxboro the land is below the summit marine level and has recorded in 

 wave-work only that of the shallowing waters. Exceptions are the hills 

 in Plymouth, a few high points in Falmouth, and the highest land of 

 the Cape Cod Peninsula. 



The numerous "ponds^^ in the lowlands doubtless occupy ice-block 

 kettles, which suggest the loaded and anchored condition of the lower 

 portion of the thinning ice-sheet. The intervening land spaces are wave- 

 leveled sands or silts or wave-smoothed drift. 



The district of Plymouth is kame-moraine, extensively smoothed by 

 wave-work. The horizontal lines are conspicuous. From any command- 

 ing point — the top of the Hotel Pilgrim, for example — the levels show 

 in all landward directions, at 100 to 120 feet elevation. The numerous 

 lakes occupy kettles in the drift which escaped filling. Judging from 

 the topogTaphic maps, the surfaces of the Plymouth, Abington, and 

 Duxbury quadrangles will show abundant evidences of standing water. 



The water-laid deposits on Manomet Hill have been described, page 

 608. 



The inferior smoothed and leveled tracts are too abundant and well 

 recognized to require description. A good display of sandplains is seen 

 along the electric railway from Plymouth to Brockton. At Kingston 

 and westward is a wide plain at 100 feet; at Oakland Square, one witii 

 kettles at over 100 feet; at Mayflower Grove a tract of leveled kames 



