394 STKATIGKArniCAL GEOLOGY. 



crystals of labradoritc, some of them two inches long. This is about the 

 eastern limit of the slate. 



If we pass over the hill, directly east from Mill Village, the last of the 

 Bethlehem series occurs about half a mile up the hill, the rock being 

 white and ferruginous, and therefore becoming reddish-brown upon ex- 

 posure. A band of quartz occurs here, such as is found in this gneiss 

 area in two localities near the river (p. 353.) The dip is 55'''' N. 65^"" E. 

 Drift conceals the ledges over most of the westerly slope of the hill. 

 At I. Fellow.s's the .slate runs N. 35° E., and stands on edge. On the 

 top of the hill the dip is 85'' S. 50'"'' E.; on the eastern slope, near the 

 eastern edge of the formation, the dip is 73'"-' N. 40"^ W. These observa- 

 tions do not give much insight into the number or nature of the foldings, 

 because the dijjs are mostly perpendicular; and such ledges may have 

 been folded without giving any indication of an axis. By Walker's slate 

 quarry there are indications of a .synclinal and an anticlinal. This range 

 may be separated from the other by a narrow band of mica and cuprifer- 

 ous schist, on the water-shed between Mink brook and Mascomy river. 

 I find that the observations in the Mink lirook valley show a northerly 

 strike, while those on the hill are north-easterly. Further search will 

 show whether this variation is correct, and, if so, whether it is due to the 

 presence of cleavage planes, or whether it has a deep significance, due 

 to the occurrence of different formations unconformable to each other. 

 The western border of these slates, just south of the Hanover line, joins 

 ferruginous schists, both dipping 80'' S. 43° E. At the slate quarry in 

 East Lebanon the slates are mostly vertical, with a north-south strike. 

 Those due east over the Enfield line are inclined at a very high angle to 

 the east. Back of Cleveland's house the slates are about vertical. On 

 the hill south, by I. Eastman's, the dips are quite irregular, one observa- 

 tion being 60'^ N. 20*^ E. That is not a common position; and my notes 

 speak of a change in the strike of thirty or forty degrees from this within 

 half a mile, in proceeding southerly. I think there is an anticlinal in 

 the slates between the two quartz ranges of East Lebanon. There are 

 several slate outcrops upon Stony brook, which I think dip to the north- 

 west, but I have preserved no record respecting them. Certainly all the 

 ledges to the west have that position, while those on Eastman's hill to 

 the cast dip in the opposite direction. 



