170 GREEN MOUNTAINS IN MASSACHUSETTS. 



on the east side of Ragged mountain appears with minor undulations. A well-marked 

 syncline tonus the top of thai mountain; on its west side the calcareous belt is crossed 

 twice with an intervening tongue of the underlying schist, necessarily anticlinal in 

 structure. At the west end of the section there is what might easily lie mistaken for 

 unconformability between the limestone and schist, a foliation in the limestone (at 

 localities 1035, 1036), striking north 77°-80^ east and dipping 25°-50° south, while 

 the plications in the schist close by and higher up (locality 1038) dip westerly with 

 a southerly cleavage, conformable to the foliation in the limestone. It is highly prob- 

 able that the filiation in the limestone is cleavage, and that a stratification dipping 

 west conformably to the plication in the schist has been obliterated. This would 

 make a syncline with the limestone underlying, as in the section. 



Section D, PI. xvm, nearly half a mile farther south. The Ragged mountain syn- 

 cline continues with the upper limestone dipping under it. On the north side of Mount 

 Williams there is a bench circling around from "Wilbur's pasture" (the saddle of this 

 Saddle mountain), at the south end of the north to south part of the Hopper, and con 

 tinning into the Notch. The eastern part of this bench is visible from the north end of 

 Ragged mountain. Along this bench probably passes Formation Sbp — here, however, 

 without any outcrops that are calcareous, except at '<U and 645onthe north northwest 

 side of Mount Williams. The presence of masses of non-calcareous schist measuring 

 from a quarter to three-quarters of a mile in length and several hundred feet wide on 

 the northeast side of Ragged mountain and on the southwest side of Saddle Ball in 

 the upper limestone and calcareous schist, and the fact that in the Hopper the strata 

 of this horizon are much less calcareous and more micaceous than at the south end of 

 Saddle Ball or in the Notch, and. finally, the presence of noncalcareous quartzite as 

 well as limestone in the same horizon in the Notch, all indicate the very changeable 

 lithologic character of this horizon. Furthermore, the general synclinal structure of 

 the central ridge, the presence of a calcareous belt on both sides of it. and the similar 

 constitution of Ragged mountain, together with the fact that at both ends of that 

 mountain the calcareous belts are connected, and the greater difficulties involved in 

 any other construction of the central crest, all lead to the interpretation given in the 

 map, and in this, as well as the other sections. Section 1) traverses Mount Williams a 

 little south of this belt of Formation Sbp. The basis for the remaining features of this 

 section will be found largely in the next one. 



Section i?, PI. XIX, crosses Ragged mountain, Mount Williams, and the north end 



of Symond's peak (Prospect mountain). The Ragged untain syncline passes east of 



the top of that ridge. Along the east base of Mount Williams a loug ledge of schist 

 shows plications dipping t(P-45°west, crossed by an easterly cleavage dipping 60°. 

 These west dips on the east side and the higher westerly dips on the west side of Mount 

 Williams indicate the character of the syncline of the central ridge seen farther south 

 on Section Gr. The high westerly dips on the top of Mount Prospect (north end, or 



