RANGE AND EXTENT. 413 



synclinal axis. The Tinmouth and Wallingford limestones are described upon Section V. 

 In the east part of Clarendon, the Eolian limestone has the general character of the 

 formation. The dip in the south part is westerly, but in the north part the quartz rock 

 runs under it at a very small angle of inclination. An exceedingly narrow strip of 

 limestone runs up to Rutland, connecting the limestone of the west range in Clarendon 

 with that between the west range of quartz and of slate in Rutland. In the west and 

 southwest part of Clarendon, there are two old marble quarries belonging to A. H. Colvin. 

 The marble there overlies impure limestones and calciferous sandstones. The latter rock 

 continues, to Clarendon Springs, often very much resembling some of the lower Silurian 

 group. At Chippen Hook, limestone of good quality is abundant. About the springs 

 the rocks are variable and interesting. Fifty rods south at a mill dam, there is a curious 

 curve in the strata, forming a sharp anticlinal. The strike varies greatly about the 

 springs, being sometimes east and west, but generally N. 10 E. 



Most of the limestone here, but not the marble, is a dark gray variety with a coarse 

 texture. Hitchcock's marble quarry is the most northern point where the marble appears. 

 Some disturbance has thrown the rocks into great confusion near the town line of 

 Clarendon and Rutland, as seen by these circumstances. The marble dips west through 

 Tinmouth and Clarendon, to this point, where it disappears. The rocks about Clarendon 

 Springs, and in the northwest part of the town, show unusual marks of disturbance. 

 Where the Rutland road crosses Furnace Brook, talcose schist dips about 50 E., upon 

 the west bank, and encrinal (?) limestone upon the east bank dips 42 W., both at the 

 same level. The schists are found all the way from the bridge to West Rutland, east of 

 the southern prolongation of the Rutland marble. It is most rational to suppose that 

 the two marble ranges must have been connected together formerly ; but now they are 

 separated from each other by a mile width of schists, the Clarendon marble dipping 45 

 W., and the Rutland marble dipping 40 E. The exact nature of this disturbance is 

 not yet ascertained. 



The marble continues north through the west part of Rutland, where an immense num- 

 ber of quarries are worked, and terminates a few rods north of Pittsford south line. There 

 is another fault in the strata of marble at West Rutland." See Plate VIII, Fig. 2. The 

 more easterly range east of the marble, but west of Rutland Center, increases greatly in 

 width as it advances north. At Sutherland's Falls there is a marble quarry worked in 

 it. East of the west range of quartz rock the limestone is very thick-bedded and obscure, 

 being probably dolomitic. It is seen in several places upon the Pittsford road. In the north 

 part of Rutland there is a peculiar brecciated limestone made up of the fragments of dark 

 colored limestone and geodic nodules of calcite and quartz, resembling the Plymouth 

 marble. In Pittsford the limestone is generally rough, impure, perhaps magnesian. Valu- 

 able beds of marble have been discovered in the northwest part of the town. The ranges 

 of limestone are the most interesting feature of the formation in Pittsford and vicinity. 



There are different spurs of limestone in this town east of Otter Creek. The first is in 

 the valley of East Creek, in the extreme southeast part of the town, projecting from Rut- 

 bind. The next spur runs up into Chittenden, along the valley of Furnace River. Most 

 of it has an easterly dip, but at its junction with quartz rock, at the foot of Bald Moun- 

 tain, it dips to the west, overlying the quartz rock. Just above the Furnace at Granger- 



