GEOLOGY OF IHE CONNECTICUT VALLEY DISTRICT. 285 



directly the Lisbon schists in central Lisbon with those in Littleton, by 

 way of the Ammonoosuc. They belong to different ranges, connected 

 by anticlinal or synclinal axes. This eastern band seems to terminate 

 near Streeter pond. 



Recent observations suggest the existence of a limited outlier of the 

 green schists on the south side of Bald hill, in the north corner of Lis- 

 bon. No ledges were discovered, but large blocks were abundant, and 

 among the pieces small boulders of jasper. The top of the hill and the 

 surrounding region show slates and Heldcrberg rocks. This band of 

 Lisbon rocks occupies a part of the space left vacant upon Fig. 27. 



The western branch of the Lisbon schists, if properly understood, is 

 broader than the eastern. At Woodsville the strata dip 80° N. 40° W. 

 This observation may be taken to represent the usual position of all 

 the ledges in the south and west parts of Bath. North of Woodsville 

 the hills rise abruptly, almost precipitously, into the Gardner Mountain 

 range; and there are high cliffs adjacent to the Connecticut river at the 

 "Narrows," above the mouth of the Ammonoosuc, the rock dipping high 

 north-westerly. A trip from Bath lower village across the mountain to 

 Connecticut river (Fig. 29), shows on Child's brook greenish schists, dip- 

 ping 30° N. So'' W., of the eastern range. Next succeed the clay slates, 

 exhibiting considerable variation, — an anticlinal situated upon a synclinal. 

 Adjacent to the slates upon both sides, but especially on the west, the 

 schists resemble the micaceous quartzites of the Lyman group, near W. 

 Lang's, dipping 80° south-easterly. The dip has essentially the same 

 direction continuous across the mountain, but a smaller angle on the 

 west side. About one third the way up the hill the schists are ferru- 

 ginous, and strongly affect the compass. The rock is rather like the 

 "killas" of Cornish miners than our typical varieties of Lyman rock, so 

 that I have hesitated about separating it from the Lisbon group, without 

 further study. The same variety follows along the ridge to Connecticut 

 river, carrying the copper veins. Dr. Jackson states that the direction 

 of the strata of the copper mine in Bath is north-west and south-east, 

 which is at right angles to its usual course in the neighborhood. I have 

 noticed a south-east dip in the schists along the west border of the slates, 

 a mile east of the mine. 



After reaching Lyman, we discover evidences of an anticlinal fold in 



