GEOLOGY OF THE CONNECTICUT VALLEY DLSTRICT. 28/ 



greater in the sections — Figs. 29 and 31 — than on Fig. 30. At the very 

 top of the Gardner range, in the road, schists, which are greenish, dip 

 50'' south-easterly. Where the road turns northerly (now abandoned), the 

 dip changes to 75°-8o° N. 55° W. Down the very steep west side of 

 the range, the position is about the same. At the edge of Bath there is 

 a band of light-colored sandstone. The copper schists are believed to 

 occur near Hunt's mountain ; and there is probably a synclinal axis be- 

 tween this mountain and Bald ledge. At the latter locality the metallif- 

 erous schists have been worked at two openings on the top and west side. 

 These two lines dip in opposite directions, the first dipping 70°-75° S. 

 E., and the second 60° N. 40° W. This same north-westerly dip is now 

 continuous to the river. Near Monroe post-office the green, soft schists, 

 dolomite, and hard slates dip 75° N. 40° W. At Mclndoe's Falls the 

 ledges are of the same sort. Farther north-west, they are succeeded by 

 the calciferous mica schist, standing vertical, with the strike N. 60° E. 

 The union of these two formations is apparently one of unconformity, 

 unless there be a local disturbance. 



Fig. 32 shows us the order of dips of the same rocks a little more than 

 two miles farther north of the last line described. It extends from the 

 Ammonoosuc river about a mile above Lisbon village to the top of Gard- 

 ner mountain, behind the Oro mine. At the eastern end of the section 

 are slates and conglomerates believed to belong to the Swift Water series. 

 The slates occur first, with a strike varying from N. 3 5 "-50° E., and the 

 dip north-westerly. This is the continuation of the slates cut by the 

 railroad just at the north edge of the village of Lisbon. The conglom- 

 erate associated appears on the hill half a mile back from the river. It 

 weathers whitish, and is known as conglomerate only after weathering. 

 The dark slates west of this rock hold bands of green schist. It is diffi- 

 cult to fix precisely the limits of the green schists by H. Aldrich's suc- 

 ceeding these slates. With our northern is a narrow band of white 

 schist and auriferous conglomerate dipping 80° N. The scattered ledges 

 of slate appearing here and there, just east of the conglomerate, may 

 have some connection with the regular Cambrian formation, which fol- 

 lows on the west, carrying gold. I have found in this immediate neigh- 

 borhood pieces of Helderberg limestone in such position as to make it 

 clear that a narrow band of it is in place just east of the conglomerate. 



