162 GREEN MOUNTAINS IN MASSACHUSETTS. 



cently to some tentative raining here. From the occurrence of the small 

 belt of calcareous schist across the top of Ragged mountain and from the 

 presence of a well-marked syncline in the western part of the small schist 

 area, the structure here has been construed as consisting of two minor folds. 



The section now crosses the " Bellowspipe." Dip observations both 

 north and south of the line (see map, PI. i), indicate an anticline here. The 

 contact on the west side of the Notch is covered, but along Section F (local- 

 ity 709) the micaceous limestone dips west, and the overlying feldspathic 

 schists occur a few rods west of it with a similar dip. Some 800 feet south 

 of this (Section G, locality 589), a quartzite, which frequently replaces or 

 is interbedded with these calcareous beds, clips 60° west ; and in ascending 

 the hill the nearest outcrop of schist (locality 591), about 500 feet west, 

 also dips west. The relations which occur on the bench on the east side of 

 Ragged mountain are thus repeated on the east side of the central ridge. 



The section now crosses the schists of the central ridge about 1 mile 

 north of Greylock summit and about a half mile south of Mount Fitch. 

 The low westerly dip was observed at several points along the Grey- 

 lock road north and south of this section and also at 831 south of Sec- 

 tion E. The section then descends into the north fork of the Hopper 

 depression. The high westerly dip occurs in the precipitous ravine which, 

 beginning about a quarter of a mile north northwest from the summit, finally 

 opens into the north fork of the Hopper. Along the 2,100 to 2,200-foot 

 contour ami extending down to about the 1,900-foot contour, on the west side 

 of the central crest and in this north to south portion of the Hopper, is a 

 belt of calcareous schist similar in character to that on both sides of Ragged 

 mountain, but less calcareous. Farther south, west of Saddle Ball, this 

 rock passes into the micaceous limestone. At several points westerly 

 dips were found in this licit. It does not recur westward in this portion of 

 the Grreylock area. From these facts the central crest has been construed 

 as a syncline of schist with a steep west side, a gently sloping east side. 

 underlaid by the limestone and calcareous schist of the Notch and the 

 Hopper. 



.Mount Prospect (Symonds peak, see PI. xvn), consists of an anti- 

 cline, with some minor undulations on the east side and a syncline on 

 its west face. This is confirmed l>v observations on Section E and also 



