GLACIAL PHENOMENA IN MAINE. 
Ill 
But let us return to our horsebacks. At 
the very beginning of our journey, we followed 
one of them for a considerable distance after 
leaving Bangor, on our way to Oldtown, be¬ 
sides which, we saw a number of similar 
ridges running parallel with it.* The name 
is somewhat descriptive, for they are shaped 
not unlike saddles with sloping sides and flat¬ 
tened summits. They consist of loose mate¬ 
rials of various sizes, usually without marked 
evidence of a regular internal arrangement, 
though occasionally traces of imperfect strati¬ 
fication are perceptible. Sometimes they fol¬ 
low horizontally, though not with an absolutely 
even level, the trend of a rocky ledge; again, 
they themselves seem to have built the founda¬ 
tion of their own superstructure, being com¬ 
posed of the same homogeneous elements which 
cover the extensive flats over which they run 
with as great regularity as upon a more solid 
basis. The longest of these horsebacks — and 
they sometimes stretch, as I have said, for 
many miles — trend mainly from north to 
* Those who wish to follow the localities indicated in this 
article should consult H. F. Walling’s map of the State of 
Maine, published by J. Cliace, Jr., Portland. 
