522 RANGE AND EXTENT. 



Other varieties, besides the normal rock, are talcose conglomerate, near the east line, and 

 chlorite schist. The strata are not generally contorted, but are remarkably regular. 



This range of schist is divided by a deep valley, which commences in South Ludlow, 

 and extends through Plymouth and Bridgewatcr, and probably through Pittsfield and 

 the north east part of Chittenden. This valley lies nearer the western than the eastern 

 border of the schist. 



Near the line between Bridgewater and Sherburne, there are strata of plumbaginous 

 schists, passing into clay slate. It is in these that we first recognize the narrow band of 

 slate, extending probably from Plymouth to Troy. Other varieties of rock in Bridge- 

 water are two beds of quartz rock, entering the town from Plymouth, two beds of steatite 

 and gold-bearing rocks. The transition from talcose schist to gneiss, in Plymouth and 

 Sherburne, is very gradual; insomuch that beds of the two rocks alternate near their junc- 

 tion. On this account it is somewhat difficult to draw the line between them on the map. 

 The talcose rocks in Stockbridge, Bethel, Rochester, Hancock, Braintree, Grranville, 

 Roxbury, and Warren, do not vary essentially from those described in Ludlow, Plymouth, 

 and Bridgewater. The same rocks are associated with them also. 



The following is the order of rocks in Roxbury and Bethel, going through these towns 

 in an easterly direction : 



Common talcose schist. Talco-micaceous schist. 



Bright-green talcose schist. Steatite and limestone. 



Chlorite schist with dolomite. Talcose schist. 



Talcose schist. Steatite with much iron ore, and scrpen- 



Quartz rock (village of Rochester.) tine. 



Talcose schist. Talcose schist. 



Talcose schist with beds of dark quartz. Chlorite schist. 



Clay slate. Talcose schist with dolomite. 



Talcose schist. Steatite, (Bethel village.) 



Plumbaginous and talcose schists. Talcose schist, whitish-colored, and green. 



Serpentine and Steatite. 

 Next follows the clay slate of another group. 



If there is any talcose schist in Vermont containing magnesia, judging from the greasy 

 feel of the rock, it should be in Roxbury, near the Verd-antique serpentine. But these 

 are aluminous, instead of magnesian, as is clearly proved by analysis. 



The character of the rocks along Winooski River, has already been described in treat- 

 ing of the lithological character of the talcose schist. The rocks from West Montpelier 

 to Middlesex village, are the following, in order : Talcose schist, novaculite schist, horn- 

 blende schist, mica schist (garnetiferous), novaculite schist, talcose grit, coarse calcareous 

 grit, talcose schist. One of the most remarkable features of the talcose schist, along its 

 eastern border, from Montpelier to the Canada line, is the association with it either of 

 talcose grits and conglomerates, or of conglomerate without any talcose matter. The 

 conclusion legitimately derived from these facts (stated elsewhere in this Report in full), 

 is that the schists may have been derived originally from sandstone or conglomerate. 



In Morristown there are, besides the common talcose schists, novaculite schist, horn- 

 blende schist, and a highly ferruginous quartz rock. In Wolcott much of the schist has a 



