GLACIAL DRIFT. 24! 
the end of a road on the direct line between the cliff and Bethlehem 
street. The distance of their transportation is about two miles, and no 
locality of this rock is known to exist nearer McDonald’s than Eagle 
cliff. Many of these blocks are four feet in length. The ledge near 
here does not show any ice marks from the local glacier, but there are 
appearances upon it of the usual south-west movement of the neighbor- 
hood (page 211). North of McDonald’s, towards Gale river, the surface 
of the drift is smooth and nearly flat. This is to be explained by the 
passage of the ice over it, as in Bethlehem. Near the western edge of 
this flat expanse is a moraine running N. 27° W., about 20 feet high 
and 40 rods long. It is thought to have been connected with this Beth- 
lehem glacier, as a medial or lateral moraine. The hill slopes rapidly 
just west of the moraine,.and has many quite large boulders scattered 
over it. 
Between Bethlehem street and Littleton is a Baptist church, near 
which I observed boulders 15 feet long, 10 wide, and 10 high, whose 
source is estimated to be from 300 to 500 feet to the south up hill. Their 
transportation down this slope I ascribe to the same local glacier. 
There are numerous moraines commencing a few rods east of Littleton 
railroad station, probably put in their present position by ice of this or a 
related glacier. The eastern slope of the hill between Bethlehem street 
and station is thickly strewn with large boulders, of material similar to 
the nearest ledges. Their position is suggestive of transportation down 
the Ammonoosuc from the east. As similar rocks occur as far as the 
Twin Mountain house, it is not unlikely that the Ammonoosuc glacier 
brought them there; but further study is required to demonstrate the 
proposition. 
Ammonoosuc Glacier. We have a few facts in regard to the move- 
ment of rocks down the Ammonoosuc valley, probably caused by a local 
glacier. The ice transported boulders far below Bethlehem station, so 
that abundant proof exists of the existence of a glacier close by the 
gneissic blocks just mentioned, on the east slope of the Bethlehem hill. 
The source of this movement was in the large valley occupied by Con- 
cord granite, between Fabyan’s and the Presidential range. Many large 
blocks of a coarser-grained granite than ordinary lie upon the slope of 
Mt. Deception, just opposite the Fabyan house, and along the turnpike 
