MODIFIED DRIFT OF THE LAKE DISTRICT. I3I 



Modified Drift overlaid by Till. 



Numerous beds of clay, nearly horizontal in stratification, but overlaid 

 and underlaid by coarse unstratified glacial drift or till, are found on hill- 

 sides up to heights 200 or 300 feet above Winnipiseogee lake. Similar 

 beds of sand appear on hills east of Alton bay. In describing these de- 

 posits, we will begin at the Wiers, and proceed around the lake in the 

 same order as before. 



The first of these clay beds overlaid by till is beside the railroad, a 

 short distance north-west from Wiers station, where it is worked by A. 

 Doe & Son for brick-making. This is blue clay, finely laminated and 

 nearly horizontal, dipping perhaps 5° to the south-east. At one place 

 where the excavation has reached the bottom of the clay, it is underlaid 



Winnipiseogee R. R. Brick-vard, Till on the snrface. A. Doe's house, 



lake. A. Doe '& Son. Clay. 



500 feet 

 above 



Y\^. 28.— Section near Wiers. Distance, k mile ; vertical scale, ^^'^■ 

 I inchz=4oo feet. 



by four feet or more of quicksand. This is at a height of about 25 feet 

 above the lake. The thickness of the clay is fully thirty feet, and it is 

 exposed by an excavation about 100 feet square. The clay is directly 

 overlaid by two to six feet of coarse till, which contains angular boulders 

 up to six feet in diameter. This is upon a hillside which rises 100 feet 

 higher, and appears on the surface to be wholly composed of till ; but 

 much of this is probably underlaid by a stratum of clay at no great depth. 

 This clay comes to the surface at A. Doe's house, about 150 feet above 

 the lake, where a well 27 feet deep encountered no other material. The 

 well filled with water from thin, sandy layers ; but most of this clay did 

 not show its lines of stratification plainly, and was inclined to break 

 with a conchoidal fracture into small pieces. At both places the clay is 

 free from stones or gravel, except that small boulders, usually less than a 

 foot in diameter, are occasionally found embedded in it. 



In New Hampton, two miles south-east from Ashland, a large deposit 

 of clay similar to that at the Wiers occurs on land of Oren Plaisted, lying 

 on the east slope of a high hill. The drainage is into the Pemigewasset 



