92 STRATIGRAPHICAL GEOLOGY. 



Mt. Pleasant, and the ridge west is composed mainly of quartz, though in 

 some places feldspar is abundant, and always a green chloritic mineral ; 

 and on the west slope of Mt. Orne there is also hornblende. 



vSection from vSiierbrooke, p. Q;, to Connecticut Lake. 



This interesting section shows the Huronian rocks on both sides of 

 the Coos group, as well as an island of Huronian in the latter. At Sher- 

 brooke the Huronian rocks consist of greenish hydro-mica schist, with 

 an easterly dip. At Lenoxville we have the beginning of the Coos 

 group, and the rocks consist of calcareous slate resting on the Huronian, 

 To the east the slates have intercalated bands of siliceous limestone. In 

 Clifton the dip is westerly, and the rocks consist of calcareous slates and 

 micaceous ochrey schists. Between Hall's and Indian streams the rocks 

 are chiefly argillaceous schists, and in general they are only slightly cal- 

 careous. Near Indian stream there appears to be a fault, and east of this 

 we find an easterly dip. From Perry stream to Connecticut lake the 

 Huronian rocks consist of light gray, siliceous, greenish, chloritic, and 

 arenaceous sandstone-schists, v/ith diorite, and the strata are everywhere 

 nearly vertical. 



Catalogue of Sections. 



Section XIV. — From the Maine Line to IlaWs Stream. 



1. Diorite, state line. 



2. " one fourth mile west of state line, 



3. Slate, two miles west from state line. 



4. 5, 6, and 7. Argillo-quartzite, two miles east of Second lake. 



8. Greenish indurated schist, a mile and three fourths east of Second lake. 



9. " " a mile and a quarter east of Second lake. 

 ID. Hard, greenish schist, a mile and a half west of Second lake. 



11. Diorite. 



12. Arenaceous schist, half a mile west of the head of Bog brook. 



13. Diorite, three fourths of a mile east of Perry stream. 



14. Arenaceous schist, half a mile west of Perry stream. 



15. " " three fourths of a mile west of Perry stream. 



16. Argillaceous schist, a mile and a quarter west of Perry stream. 



17. Argillo-mica schist, three miles cast of Indian stream. 



18. Argillaceous schist, wrinkled and contorted, a mile and a half east of Indian 



stream. 



19. Argillaceous schist, fissile, near last. 



