176 GREEN MOUNTAINS IN MASSACHUSETTS. 



northerly pitch on the east think of Ragged mountain west of Rowland's, 

 between Sections F and E; but along the Notch brook the pitch is south 

 like that on the Central crest (Section Q). The deeper part of the syn- 

 cline is about under the center of Ragged mountain. The upper lime- 

 stone rises to the surface about a mile south of the south end of this moun- 

 tain with a gentle northerly pitch, 1 and about l.\ miles farther south the 

 underlying schists also rise to the surface, forming the pinnacle and the 

 neighboring schist masses which hedge in on the south the northern area 

 of the upper limestone. South of this is the Farnham's quarry limestone 

 area, with well observed opposite pitches north and south of it, forming a 

 shorter and shallower trough in the same axis. The section ends on the 

 east of Savage mountain. The length of the Ragged mountain trough is 

 about 7i miles, and the entire length of the Farnham's quarry trough, 

 extending beyond the limit of the section, would lie about <> miles 



Section < t ) follows for 144 miles the axis of the central or Grreylock 

 svncline, beginning at the foot of Clarksburg mountain, a little north of 

 ('loss-section A. From observations made l>v other members of this di- 

 vision the quartzite of Clarksbui'g mountain is known to have a southerly 

 pitch. The lower limestone is, tor topographic reasons, supposed to pass 

 completely around between the Clarksburg and Grreylock masses, and thus, 

 of course, to conform in pitch to the horizons below and above it, A steep 

 southerly pitch is observed at the north end of the central crest, Mount 

 Williams. This section shows a, deep trough corresponding to that on Sec- 

 tion P, but with its center about 2 miles farther south, at Cross-section I, in 

 the saddle between Grreylock and Saddle Ball. The south end or edge of 

 this trough is at Round rocks, almost in a line with the south end of the 

 great trough in the eastern syncline. This trough is a little longer, meas- 

 uring 8J miles. In the incision between Round rocks and Saddle Ball the 

 upper limestone and calcareous schists come to the surface. South of this 



1 North of this part of the syncline, at. the south coil of Ragged mountain, the vertical distance 

 between the top of the upper limestone horizon, where it is overlaid by the smaller mass of the 

 upper sehist. and the lowest contour, where the upper limestone occurs, together with the slight 

 thickness of the deposit necessitate a southerly pitch. Thus also south of the saddle (the Bellows- 

 pipe i ; ami lor similar reasons a uorl herlj pitch is supposed between that saddle < Section 6) and lo- 

 cality 632 in the Notch Mellon fi 



