134 GREEN MOUNTAINS IN MASSACHUSETTS. 



arated on the nortli from Clarksburg or Bald mountain, a projection of the 

 Green mountain range, by an east-west valley, through which the Hoosic 

 river turns on its way to the Hudson; and from that point the Greylock 

 mass rises 2,700 feet in a distance of 5 miles to an altitude of 3,505 

 feet above sea level, and thence descends more or less gradually for 11£ 

 miles in a general south-southwestern direction, dying out in gentle undu- 

 lations within about 2i miles northeast of the town of Pittsfield. On the 

 east it is separated from the Hoosac range by the alluvial and terraced 

 valley of the Hoosic, while oil the northwest it is divided from the Taconics 

 by the broad and picturesque valley of Green river, which flows into 

 the Hoosic at Williamstown. On the west and southwest it is separated 

 from East and Potter mountains by the valleys and glens through which 

 flow the headwaters of Green river on the nortli and of the Housatonic on 

 the south. 



The aspect of Mount Greylock from a point about 4 miles south of 

 North Adams, on the Bank of Hoosac mountain, embraces the eastern side 

 of the mountain almost in its entire extent (PI. xn), and shows a central 

 mountain mass, of elongated but symmetrical form, with subordinate masses 

 of similar shape and parallel trend, steep, rocky, wooded, and separated 

 from the central ridge by areas of gently sloping cultivated land. This alter- 

 nation of wood and meadow land, and the variety of form and color which 

 it produces, are striking features in the landscape, and, as will be shown 

 farther on, have much geologic significance. 



The western aspect of Mount Greylock, from a point on the Taconic 

 crest west of South Williamstown, forms a marked contrast to the eastern 

 (PI. xni). Here the central crest is seen to descend rapidly about 2£ miles 

 south of the summit, and then to rise a few hundred feet again. This inci- 

 sion in the crest is better shown in Fig. 74. Two powerful buttress-like 

 spurs project from the central mass westwardly for over "2 miles. Their 

 summits are lint !>00 feet lower than that of Greylock. The northerly 

 spur, Mount Prospect, or Symonds peak, is separated from the southerly 

 one. Paid mountain,' by a deep east-west cut, called the " Hopper." This 

 cut branches out to the east into four deep ravines, which penetrate still 



■ This Bald mountain should not be coufouuded with Clarksburg mtain, which is aometimea 



called h\ that uame and kuown also as Oak hill. 



