DESCRIPTION OF SECTIONS 25 



51. — 14. mile N of locality 50, Sugar Ball Bluff on the eastern 

 side of the Merrimac River, at the sharp bend. 



Surface of wash plain. 



30 feet sand. 



Varve sand; 5 varves varying from 1^ inches to 8 feet in 



thickness. 

 50 feet (varve sand?) covered by talus. 

 At river level varve silt; 10 varves averaging iK inches in 



thickness. 



The series is not connected with the normal curve. 



52. — 7 miles NNW of Concord, yi mile NW of Boyce station, 

 bluff on the eastern side of the Merrimac River. 



Surface of wash plain. 



60 feet of sand, mostly covered by talus, perhaps partly varve 



sand. 

 Varve sand, varves 6232-6243; average thickness 1 foot. 

 Silt and quicksand, varves 622 1-623 1; average thickness 3 



inches. 

 Good silty varve clay. 

 Talus extending 13 feet down to the river level. 



Series measured: 6105-6141, 6163-6220, (6142-6162, 

 6221-6243). 



53. — 250 yards NE of locality 52, bluff on the Merrimac River 

 and ravine 75 yards E of the bluff and 75 yards W of the 

 railroad. 



Surface of wash plain. 



50 feet sand, mixed with some gravel. 



Varve sediments; thick varves consisting of sand, thin varves 



of silt or sandy silt; thickness varying from iK inches to 



3K feet. 

 Talus 10 feet down to river level. 



One series of 45 and another of 38 varves were meas- 

 ured on the same horizon. They are not connected 

 with the normal curve. 



