160 GREEN MOUNTAINS IN MASSACHUSETTS. 



TRANSVERSE SECTION G. 



From the I/<„,Ki<- river at Renfrew mills (Smith Adams) across Ragged mountain, the central ridge, Symonds 

 peak (Mount Prospect), and the north end of Deer hill See PI. xx and Fig. 61. 



Between the most easterly and the most westerly outcrops in the lime- 

 stone area along the east foot of Greylock there is a sync-line followed 

 westerly by an anticline. This is corroborated by observations about the 

 quarries a quarter of a mile north. The well-known relation of the lime- 

 stone to the schists farther up the mountain is not shown here, but may lie 

 seen on Section B, PI. xvm, about l.V miles south of North Adams, locality 

 28, where the limestone, after forming a very small anticline, ruptured and 

 partially eroded, dips, a few feet west of it, at an angle of 15° to 30° west, 

 conformably under the schist, both rocks striking north 2f>° east. 



Above, the Hoosic valley limestone conies a mass of schist which 

 tonus the lower, more precipitous, and wooded slopes, and which, along this 



Flu. 61. Section G from the Hnosic river across Nagged mountain, the Central ridge, Symonds peak (Mount Prospect) 

 and Deer hill. 



section, dips west at an angle of about 30 . Above these schists is a 

 bench of arable land stretching for several miles along the east side of 

 Ragged mountain. This mountain forms the higher portion of the northern 

 end of the range as seen from Hoosac mountain (PI. xn), but is separated 

 from the central crest by the "Notch," the south end of which is called 

 the " Bellowspipe," from the prevalence of wind there. (See PI. XVI.) 

 This bench on the east of Ragged mountain measures about 600 feet in 

 width and is marked by outcrops of a micaceous limestone which here clips 

 70° to 75° west. Tin; bench seems to owe its agricultural value in part to 

 the rapid decomposition and soil-forming quality of this rock„ and probably 

 in part also to the fact that this more deeply eroded strip of the mountain 

 flank has formed a receptacle for sand and soil which would have been 

 drained off a steep slope. At several points on the west side of the bench 

 the micaceous limestone comes in close proximity to another mass of schist, 

 but the upper contact is covered on this section. At localities 83S, 839, Sec- 



