26 ICE RECESSION IN NEW ENGLAND 



54. — 7^ miles NNW of Concord, 1 mile N\V of Penacook 

 station, gravel pit just W of the railroad, 400 yards S 

 of the bend of the Merrimac River which lies close to 

 the railroad. 



2y 2 feet sand. 



iK feet varve sand, disturbed. 



2 feet sandy varve silt, partly disturbed. 



Silty clay, varves 5942-6177. Two zones disturbed. 



3 inches slidden zone. 

 Varve sand, 15 varves. 



Depth to bottom probably inconsiderable. 



Series measured: 5942-5985, 5995-6124, 6144-6177, 

 (6178-6201J. 



55. — 250 yards N of locality 54, bluff on the western side of the 

 Merrimac River, 150 yards S of the bend of the river. 



The clay is covered by 10 feet of sand and gravel. The lamina- 

 tion is excellent. The clay continues to unknown depth 

 below the river level. 



Series measured: 6004-6177. 6184-6220, (6178-6183, 

 6221-6234). 



56. — 350 yards NE of locality 55, bluff on the eastern side of the 

 Merrimac River. 



The well-laminated, gray clay is covered by 5 feet of fine 

 gravel. It continues to unknown depth below the river. 



Series measured: 59S7-6220, (5937-5986, 6221-6247). 



57. — Yi mile NNE of locality 56, bluff on the eastern side of the 

 Merrimac River. Three sections were measured: 

 A. 



Surface of wash plain. 



25 feet sand, towards the north much thicker, as the under- 

 lying varve sand dips that way. 

 Varve sand, 20 varves, from 6 inches to 7 feet in thickness. 

 40 feet talus down to the river level. 



The varve series corresponds to the lower part of sec- 

 tion 53. It is not connected with the normal curve. 



