352 KANGE AND EXTENT. 



decomposition, has preserved the hill from extinction. At a Mr. Griggs' house, north of 

 Rutland Center and near Otter Creek, are rocks that belong to this belt of quartz. A 

 quarter of a mile north of the Center, and at the Center itself, the real quartz rock is 

 abundant. Passing south towards Clarendon the same rock appears near the town line. 

 In the north part of Clarendon are several varieties of rock in the same range : brown 

 quartz, talcose schist, gneissoid quartz, slaty quartz, all dipping to the east at a small 

 angle. 



In proceeding west from Clarendon Center, we cross over this range of quartz rock. On 

 the eastern base of the high hill it dips 35 northeast, which is the usual position. The 

 rock is a coarse quartz, and upon the crest of the hill it becomes slaty, dipping from 86 

 E. to perpendicular. Then a blue quartz appears, containing numerous veins of white 

 quartz, which is succeeded by the common brown quartz, all of it being perpendicular. 

 West of this is a silicious limestone of another formation. The hill continues south, 

 increasing in height, into Tinmouth. Most of the formation in this town is of the 

 common semi-vitreous variety : but in the southern part of the town it begins to be 

 associated with slates of various kinds. These gradually increase in width until, in the 

 north part of Danby, the quartz rock is entirely merged into them. These continue 

 south till they are cut off by a fault from Danby Mountain. 



This deposit of quartz rock in Rutland County, is represented in company with the 

 adjoining rocks on Plate VIII, Fig. 2. It appears that its dips and strikes in different 

 parts of the terrain do not agree with one another. At its southern terminus, small 

 dislocations occur, making it dip to the north. It here (two miles north of Danby 

 corners) resembles the coarser grit of the red sandrock. It is interstratified with the 

 peculiar limestone of that series, and exhibits the same tendency to plication. In a 

 distance of fifty feet there is a sharp synclinal axis, the east side dipping from 10 to 

 25 W. and the west side dipping 60 E. 



Returning back to the principal range in Pittsford, we find that the relations of the 

 quartz rock and Eolian (?) limestone are very complicated. Commencing at the spur in 

 Rutland, the quartz rock passes into Pittsford, forming a high range of hills, of which 

 Blueberry Hill, Spruce Hill, Long Hill, Bald Peak, and East Peak are parts. The dip 

 of the strata in this range is generally to the east. The rock is hardly pure quartz, but 

 rather the indescribable variety, designated as quartzose aggregate. Occasionally a coarse 

 conglomerate shows itself. The eastern limit of this bend is west of South Chittenden. 

 At Bald Peak the quartz rock runs N". 60 E., and in conformity with it the whole 

 formation curves at this point and passes into Chittenden, upon the southeast side of 

 Furnace River. The valley of the river is occupied mostly by limestone, though a short 

 distance above Grangerville, half a mile above the Furnace, there is a limited amount of 

 quartz rock, sandstone and conglomerate, running N. 40 W., and dipping 45 S.W., in 

 the bed of the river. These ledges continue northeasterly, not increasing in width for 

 three miles. Then the, rock expands suddenly, and is represented upon the map as uniting 

 with the curved range, from Bald Peak in the north part of Chittenden though this 

 is doubtful. At all events it is but a narrow band of limestone that separates the 

 two quartz bands. In the north part of Chittenden there is a large amount of 

 conglomerate. 



