286 THE ICE AGE IN NORTH AMERICA. 



Abington, Pomfret, and Woodstock, is characterized by a series 

 of very smoothly rounded, detached hills, in which the rock is 

 usually entirely concealed. These form astriking contrast with 

 the longer and more continuous [rocky] ridges of the adjoining 

 formation." * Professor G. H. Stone reports that drumlins of 

 large size, like those about Boston, have not been found in 

 Maine. Western New York, between Syracuse and Rochester, 

 presents a surprising number of parallel north-and-south drift- 

 hills, probably familiar to many travelers by rail. Some of them 

 are so long, smooth, and even, that the country thereabout 

 has been described as fluted. These were long ago described 

 by Professor James Hall, in his " Geology of the Fourth Dis- 

 trict of New York " (1843) ; since then they have been strangely 

 neglected until examined by Dr. L. Johnson, who has lately 

 published a paper, \ entitled "The Parallel Drift Hills of 

 Western New York." Some of the ridges are "two or three 

 miles long, and attain elevations of one or two hundred feet 

 above the intervening valleys ; but the greater number are 

 shorter and steeper. Many of them were, when first cleared 

 of timber, very steep at their north ends, and on their east 

 and west sides ; but, with very rare exceptions, the southern 

 slope is gradual.'' These and other irregularities of form 



a f& "At 



it* 



Fig. 91.— Drumlins in Wisconsin. (Chamberlin.) 



may require that some of the hills of this region should be 

 separated from drumlins as here defined. In Wisconsin, the 

 drift-hills, as described by President T. C. Chamberlin, "are 

 arranged in lines, and their longer axes invariably lie parallel 

 to the movement of the ice. In some localities, especially 



* "Geology of Connecticut," 1842, pp. 256, 461, 479, 485. 



f " Transactions of the New York Academy of Sciences," vol. i, 1882, p. 7*7. 



