32 BULLETIN OF THE 



■without definite arrangement between the trains. These, however, 

 would not amount to more than one per cent of the whole number. 



Only one distinct train of any considerable length can be traced, the 

 others being quite fragmentary, and, though well defined in certain 

 localities, in many quite indistinct. 



The course of the trains is not dependent upon the inequalities of the 

 surface, since it lies transversely across ranges of hills five or six hun- 

 dred feet high. 



It is not strictly true that the trains cross the ranges through gaps 

 in the same. 



Throughout the region it is generally true that, in any one locality, 

 the direction of the trains coincides with the direction of the striae in 

 the immediate vicinity. 



The general direction of the striae and of the trains is S. 45° E. 



There is a very marked diminution in the size and abundance of the 

 boulders from the northwest to the southeast. 



The boulders which make up the trains differ essentially from those 

 contained in the underlying drift, since the former are angular, and 

 almost wholly free from signs of abrasion. 



Besides the chloritic schist boulders there are three other kinds, 

 which, though of minor importance, are nevertheless worthy of notice. 



CHLORITIC SANDSTONE BOXJLDERS. 



Half a mile north of the summit of Perry's Peak, the highest point of 

 the Richmond Range, are several boulders, ten or fifteen feet in length, 

 which, at a little distance, closely resemble the chloritic schist boulders, 

 but which prove to be in reality composed of chloritic sandstone similar 

 to that of which Douglas Knob is made up. These boulders are 

 worthy of mention on account of their elevation, which is 400 feet above 

 their probable source, namely, Douglas Knob. A solitary boulder of 

 the same kind of rock rests upon the same range, about a quarter of a 

 mile southeast of the summit of Perry's Peak, at au elevation of 300 

 feet above Douglas Knob. 



GRAY LIMESTONE BOULDERS. 



A thin-flaggy, gray limestone has been referred to (page 23) as occur- 

 ring on the western slope of the Richmond Range near the base, where 

 it forms a narrow band running nearly north and south. On the east 

 side of this band, in the towns of Canaan and Lebanon, are many boul- 

 ders, usually oval in shape, composed of this kind of rock, while 



