314 STRATIGRAPHICAL GEOLOGY. 



slabs. At E— II the dip is 50° N. 27° W. At G— 10 the dip is 68° N. 20° W. to N. 

 12° W., five hundred feet farther to the north-east. At the Bedell mine the dip is 80° 

 N. 22° W. On the next range to the north-west, between F — 13 and 14. the dip is 

 80° N. 32° W. ; at F — 14, the same ; on the road near H — 12, 70° N. 12° E. ; below 

 G — 12, 90°, with strike of N. 78° E. ; near H — 10, 58° N. 13° E. ; four hundred feet 

 farther east, 67° N. 12° W. ; between H and I— 9, 60° N. 8° E. ; near 1—8, 80° N. 

 32° \V. 



Returning to the main range, we find immense slate ledges near Dr. Brown's barn, 

 at the end of a road about G — 6, dipping north. On the crest of the hill north-west 

 the slates have the same strike, but stand vertically. East of the barn the dip is 50° 

 north. The position is the same north of H — 5. At L — 5 the dip is about 20° west 

 of north. It is 68° N. 20° W. at M— 5. Between N and N— i the dip is 65° N. 37° 

 W., the strata being much contorted. The same fact is true of the boundary line from 

 here for 3000 feet westerly. The Lyman schists on the south-east usually form a low 

 hill or precipice immediately adjacent to the extremely bent slates. It is likely there is 

 more or less of a fault all along the line. About a third of this boundary is obscured by 

 a swamp. The presence of the fault is further confirmed by the high Lyman schist hill, 

 near Titus's house, which is full of contortions. Where the color for slate is spread 

 out to the north (P — 5), I find evidence of a bending of the rock. Opposite the angle 

 between P and Q — 4 the dip is N. 48° E., and that is the common position in the neigh- 

 borhood. It gradually works around to the normal position of N, 35° W. at the Dodge 

 mine. The same change is apparent in proceeding south-westerly from the N. 48° E. 

 dip. Some of the ledges near the angle show marks of disturbance. I suppose the 

 strata have been bent here especially, because of the projection of the underlying Ly- 

 man rock. These facts do not militate against our theory of the unconformable cov- 

 ering of the Lyman rocks by the clay slates. 



Other dips are the following : 



200 feet south of O— i, dip 44° N. Brook between S and S— i, dip 60° N. 



200 feet west of O — i, dip 50° N. 8° W. 32° W. 



Between O and O— i, 60° N. 62° W. Between T and T— i, dip 50° N. 22° W. 



200 feet west of P— i, dip 85° N. 14° W. 100 feet N. W. from T— i, dip 48° N. 47° 



Between P and Q, dip 85° N. 12° W. W. 



Between Q and Q— i, 45° N. 37° W. Between V— i and 2, dip 56° N. 42° W. 



At R, vertical, strike E. and W. 200 feet N. W. of X, dip 28° N. 17° W. 



Between R and R— i, dip 62° N. 12° W. At R— 6, dip 65° N. 12° W. 



Between R and S— i, dip 41° N. 47° W. Near S— 6, dip 72° N. 32° W. 



300 feet north of last, dip 40° N. 22° W. Near U— 6, dip 87° N. 12° W. 



The relations of the slates to the knobs of white quartz in the Lisbon 

 group, showing unconformity, have already been treated of (p. 282). The 

 dip of the slates is very high north-westerly across the formation half a 



