GLACIAL DRIFT. 23I 



to constitute a true moraine. The observer will call a particular example 

 a lateral moraine, or one derived by the later sliding, according to his 

 prepossession. For example: in Moultonborough, between Long and 

 Round ponds, is a long drift ridge in the middle of the valley parallel 

 with Red hill. This may be called the local frontal moraine, sliding 

 from the whole western slope of Red hill, or else a lateral moraine of 

 ice from the north pushing towards Lake Winnipiseogee. I think this 

 example, as it lies fairly in the middle of the valley, is properly a case of 

 sliding from Red hill ; but Prof. Agassiz refers to this, or one like it, in 

 a paper cited a few pages ahead, as a lateral moraine. At the south- 

 west end of Red hill, this same moraine changes its direction, conform- 

 ing to the slope of the hill. Other illustrations are in the Wildcat valley 

 of Jackson, which seem to be the lateral moraines of the ice filling the 

 whole valley. 



Near the town lines of Moultonborough and Tuftonborough, next Ossipee mountain, 

 are several ridges, mostly gravelly, that seem to have been turned up by ice sliding down 

 the elevation. By Mrs. Brian's they are large and conspicuous, with a south-east course. 

 Further south, they begin to trend a little more southerly than is required for perfect 

 parallelism with the mountain, and often are a mile long. Near G. Hartford's in Moul- 

 tonborough is a small ridge of drift parallel with the mountain. In the south-east corner 

 of Sandwich are quite extensive ridges of till parallel with the Ossipee mountains, and 

 having a course about north-east and south-west. On the east side of the same moun- 

 tains, from Moultonville nearly to West Ossipee station, is a nearly continuous fringe 

 of large, angular blocks of porphyritic granite, such as occurs at the east part of the 

 elevation, underlying the granitic breccias. These probably underlie the broad sand 

 plain of the Bear Camp river. Green mountain in Effingham is an isolated elevation ; 

 and I thought at first these granitic blocks at the base of Ossipee came from it, having 

 been transported northerly. Rock of similar character occurs on Green mountain, but 

 it does not seem to have been carried so far to the north. There are many large blocks 

 of granite close by Ossipee pond, at the cross-roads about three miles north-west from 

 Green mountain, which probably came from the Ossipee mountains, moving east or 

 south-east. The largest one seen is 21 feet long, from 7 to 14 high, and 16 wide. 

 Green mountain has a great thickness of hard, compressed till upon its northern flank, 

 extending more than half-way up. At its base are some small ridges turned up parallel 

 to the mountain, with the steep slope against the mountain, as would naturally be the 

 case if their origin were what is here indicated. The till has usually a smooth surface, 

 the loose blocks having been removed from it by the sliding. Some of the striated 

 blocks, as at James S. Smith's, have been deposited in stratified sand. A boulder of 

 Ossipee granite over the sand near here is 12 feet in diameter. The thick deposit of 

 till is wanting on the south side. 



