CHLORITE SCHIST. 283 



opinion respecting the name. It is in these cases, 

 however, that it forms the most continuous and 

 extensive masses, however imperfectly defined its 

 characters may often be. Under these circum- 

 stances also, it so exactly resembles micaceous 

 schist, in the disposition, the thickness, and the 

 other general characters of its stratification, that 

 it is superfluous to state these circumstances more 

 particularly. 



But it also occurs in association with gneiss ; 

 alternating with its beds, and even entering, as 

 already noticed, into the composition of some of 

 the varieties, so as to pass, by a transition, more 

 or less complete, into the ordinary and perfect 

 kinds of that rock. 



Not unfrequently also, it is found accompa- 

 nying the argillaceous schists, into which it some- 

 times further passes ; by transitions, however, of 

 no very perfect nature. In one extensive tract in 

 Scotland, it is thus seen alternating and inter- 

 mixed in a very irregular manner, not only with 

 that rock, but with micaceous schist, and with 

 some varieties of gneiss, as well as of primary 

 limestone ; forming a series of great interest in a 



