THE NORMAL CURVE 57 



6001-6200. — Continued 



N. H.," PI. IV). On the other hand a few other 

 varves are somewhat too thick in the Merrimac 

 Valley (upper "16 Vt.-N. H."), where several of the 

 thickest layers are sandy or silty. 



The majority of 6010-6082, at locality 47, are 

 thick and more or less sandy, probably mainly 

 because of the fact that the late glacial Suncook 

 River discharged into the lake 4 miles to the 

 northeast. 



6037 and 6120, at locality 31, are \}4 and 1% inches 

 (4 and 4.3 cm.) thick and thus abnormal. At lo- 

 cality 35 varve 6037 * s somewhat thinner than 

 varve 6036, and varve 6120 is somewhat thicker 

 than 61 19. 



6074, at localities 35 and 40, measures 12^ and 10 inches 

 (25 and 32 cm.) respectively. 



Most of the varves 6 142-6 162, at locality 52, are 

 sandy and more or less thicker than at the other 

 localities, probably because the current swept over 

 the locality. 



6160, at locality 31, is abnormal and \}4 inches (4 cm.) 

 thick. 



6178-6183, at localities 54 and 55, are sandy and locally too 

 thick because of strong current. 



6196, at locality 54, is sandy and 3JH5 inches (8 cm.) thick, 

 while, at the adjacent point 55, it measures \]/i 

 inches (3.3 cm.), i.e. is normal 

 6201-6277. — The correspondence between the two curves (both 

 "17 Vt.-N .H.") is fairly good. In the Connecticut 

 Valley (lower curve), however, varves 6258 and 

 6275, among others, are sandy and too thick. 

 6278-6352. — Fairly good. Varve 6308 is sandy and perhaps of 

 abnormal thickness. Some other varves also are 

 sandy because deposited in very shallow water. 

 6353-6600.— Gap. 



