GEOLOGY OF THE CONNECTICUT VALLEY DISTRICT. 423 



near John Harris's and at J. B. Fisk's, there are prominent outcrops. It 

 is the principal rock nearly as far south as A. G. Newton's in Hinsdale, 

 where it is cut off by granite. The argillaceous schist opposite Brattle- 

 boro' seems to be rather an outlier of the great band that extends from 

 Vernon northward along the Connecticut. The boundary between this 

 rock and the slate that is sufficiently fissile for roofing, and the boundary 

 between it and the Calciferous mica schist, cannot be readily traced; but 

 perhaps closer study would enable one to do it. The strata of this band 

 are very often nearly vertical. Opposite Brattleboro' the dip is E. from 

 75° to 80°, but the inclination, as we go east, is less. Going up the river, 

 we find both easterly and westerly dips. In Chesterfield this rock does 

 not extend along the river above Catsbane brook, for here we have a hard 

 siliceous schist that may belong to some older group. This is suggested 

 by the fact that we have at G. T. Dunham's a hornblende schist, which 

 must extend some distance up the river, as it appears above Putney vil- 

 lage. The argillaceous schist does not extend more than a mile and 

 three fourths below the Brattleboro' bridge, and here it is succeeded by 

 quartzite. The argillaceous schist in Fig. 6^, across Wantastiquit moun- 

 tain, shows the nearly vertical strata that characterize this rock here 

 and its extension west in Vermont. The exception, as we go east from 

 the crest of the first valley, is probably due to the folds so common in 

 the argillaceous schist northward. On the east it is often vertical, but 

 sometimes it has an easterly and sometimes a westerly dip. In the south 

 part of Winchester, near C. Lyman's, we have a band of argillaceous mica 

 schist, of limited extent, and a quartzite band on the west. 



It is difficult to determine with certainty the relation of these argillites 

 to the quartzite, since the strata seem so often to be inverted ; but if the 

 argillite of Charlestown is identical with those southward along the river, 

 then it must be more recent than the quartzites, since the immense frag- 

 ments found in the quartzite must have been folded in from overlying 

 strata. The following dips have been observed : 



Charlestown. Near forks of road east of Miss Wheeler's, 

 At William Smith's, strata nearly vertical N. 55° W.— variable. 



and contorted. \ mile north-west of J. Gregg's, S. 30° E. 

 At G. Hamlin's, N. 55° W. 50°. 40°. ; \ mile north-west of J. Gregg's, 



South-west side same hill, N. 35° E. 55°. S. 70° E. 50°. 



