102 



Topographical Geology. 



way, which has been already described. As a mere object of scenery 

 they are not so striking- as Turner's Falls ; though they exhibit not 

 a little of wildness and sublimity ; and they are especially worth a 

 visit from the geologist, as affording a good exhibition of the effects 

 of a mountain torrent upon the hardest of rocks. 



Spicket Falls. 



Spicket river is a tributary of the Merrimack, and a few miles 

 above its mouth in Methuen, it falls 30 feet. These falls are in the 

 midst of a nourishing manufacturing village, and are a beautiful ob- 

 ject, well worthy the attention and the pencil of the man of taste. 



Falls in Fall River. 



These are most interesting on account of the economical purposes 

 to which the waters are applied : keeping in motion, as they do, all 

 the machinery of a large and nourishing manufacturing village in 

 Troy. Still, a stream of any size cannot fall 1 00 feet in the course 

 6f a few rods, without presenting natural scenery of some interest. 



Pawtucket Falls. 



These occur in the Merrimack, between Lowell and Dracut ; and 

 their romantic appearance is heightened by the bridge erected at 

 their head. 



The Gorge, alias, the Glen. 



In the south part of Leyden, a large brook has worn a passage 

 from 10 to 20 feet wide, and from 30 to 50 feet deep, in the strata of 

 argillo-micaceous slate. The layers of the slate are nearly perpen- 

 dicular, and it is traversed by numerous cross seams, into which the 

 water penetrates, and in winter freezes, expands, and thus assists in 

 removing mass after mass of the rock from its place. A slight in- 

 spection of the place will show that such was the mode of its forma- 

 tion ; although one cannot but perceive that a great length of time 

 was requisite for the whole process. There is not the slightest ap- 

 pearance of any convulsion at this place, since the original elevatipn 

 of the strata. The correspondence between the salient and reenter- 

 ing angles on opposite sides of this stream, is no greater than exists 

 in every stream ; and all the appearances at the place forbid the sup- 



