282 STRATIGRAPIIICAL GEOLOGY. 



Lisbon there is a coarse conglomerate in the schists, the strata dipping 

 north-westerly. 



These rocks are well developed through Lisbon. General statements 

 respecting them are given with the description of Fig. 28. The following 

 are the details of this, the best section I have crossing this band, from 

 Lisbon village to the town line west. The eastern limit is reached back 

 of the railroad, near a narrow band of clay slate belonging to the Swift 

 Water series. The green schists by the church contain a little limestone, 

 and dip 64° N. 62° W. In the river under the bridge are quartzites and 

 coarse conglomerates, quite suggestive of the Helderberg under the North 

 Lisbon bridge. The more western of these strata hold elongated and 

 flattened pebbles, with the dip 44° N. y^^ W. A few rods on the road 

 up the stream are green schists, with limestone seams, dipping 40° N. 

 60° W. Under the hill west, by E. C. Stevens's house, is a prominent 

 ledge of hydro-micaceous schists dipping 60° N. 30° W., and holding a 

 quartz vein carrying a little galena. At the edge of the woods the same 

 green schists dip N. 55° W. Near the top of the hill we find hard, green 

 pyritiferous schists that dip N.'6o° W.; at the very top, N. 70° W.; and 

 there is some easily-decomposing carbonate present in the rock. The 

 whole hill is composed of these green schists. On the western slope, 

 and near the cross roads, the dip is N. 65° W. The rock contains a little 

 galena scattered through the hill in minute particles. North of the line 

 of section a short distance, there has been an opening for copper ore. 

 The metal is present, though not in large amount; but the existence of 

 copper and lead, which are widely disseminated through these ledges, 

 suggests the similarity of the horizon to the richer veins of Gardner 

 mountain. On the west side of the by-road the schist contains horn- 

 blende and pyrites. Succeeding layers approach gray quartzite in com- 

 position, dipping 57° N. 55° W. About two hundred and fifty feet east 

 of the house of Jason Titus, the last member of the series makes its 

 appearance, — a mass of white quartz dipping 50° N. 55^? W., varying 

 from fifty to one hundred and fifty feet in thickness. 



This bed of quartz is a matter of importance. There are four out- 

 crops of it along the same horizon, near the Lyman town line. The 

 most southern begins one thousand feet north of the road from Lisbon 

 over Gordon hill, and extends for six hundred and sixty feet in length, 



