RANGE AND EXTENT. 411 



Clarendon separates into two branches ; called, upon the table previously given, the west 

 and middle ranges. The eastern branch narrows in the north part of Clarendon, but 

 finally unites with the principal range in Pittsford. The western branch terminates at 

 Rutland line, but is continued after a short interruption, northerly, through the west part 

 of Rutland, uniting with the others in Pittsford. There are six different branches of the 

 Eolian limestone in Pittsford. 



The character of this rock in the south part of Pownal is treated of under Section I, as 

 is likewise the case respecting the rocks crossed by the other sections. The limestone is 

 somewhat wider than usual on Hoosac River on account of erosion, and thus it bulges out 

 a little to the west, on the map. The river has been instrumental in wearing away much 

 of the slate rock, and thus increasing the area of the limestone. It does not connect with 

 the limestone of Petersburgh, N. Y. 



The valley of the south branch of the Waloomsac River passes over limestone. Near 

 the north line of Pownal, there is a change in the position of the limestone. Instead of 

 overlying the slate it underlies it, as at Mt. Anthony. 



In the village of North Bennington the limestone is gray, thick-bedded, and dips at a 

 small angle to the east. About a mile from the State line in the southwest part of Shafts- 

 bury, the west range of limestone shows itself, and probably extends north to connect with 

 the belt of limestone in West Arlington. Cranston's marble quarry is one and a half miles 

 southwest of Shaftsbury Center. Above this quarry there is a black clay slate more or less 

 plumbaginous, interstratified with it. Near Shaftsbury R. R. depot, there are some ledges 

 of thick-bedded limestone dipping only 15 W., appearing as if they had never been dis- 

 turbed. In the east part of the town there is limestone interstratified with quartz rock, 

 along Furnace Brook. Along the eastern base of the great range of mountains, styled 

 West Mountain, Spruce Peak, Bald Mountain, Red Mountain and Equinox Mountain, 

 limestone and marble are found in great abundance running under the range, and conse- 

 quently dipping to the west. The great valley east is underlaid by limestone, and seems 

 to have been excavated because the limestone decomposes more easily than the adjacent 

 firm slates or unyielding quartz. 



There is nothing of special interest north of Section III. until reaching Factory Point 

 in Manchester. There, in the bed of the west branch of the Battenkill, the limestone 

 appears generally very silicious, having beds of quartz in it. There is also, in the vicinity, 

 and underlying these beds, the black argillo-micaceous limestone described under the sixth 

 variety, and occurring in East and North Dorset. It is generally about horizontal with 

 numerous little convolutions in the strata. North of Manchester depot there is a coarse 

 thick-bedded limestone or dolomite, whose position is indeterminable on account of the 

 abrasion of the strata. Generally between Manchester and East Dorset the limestone 

 is uncommonly well developed, usually dipping about ten degrees northerly beneath Dor- 

 set Mountain. In the south part of Dorset, near the line, are several marble quarries, in 

 one of which there is an interesting fold, figured in the Economical Report. In the north 

 part of Dorset, Neoney hill is a small elevation of about two hundred and fifty feet of 

 rather silicious limestone. The valley between Dorset and Danby is extremely narrow, 

 with steep sides. A hill in addition to Neoney hill runs through the valley, composed of 

 limestone. 



