524 TALCOSE SCHIST. 



they are mostly talcose schists. In the south-east corner of Huntington, there is a 

 mass of a syenitic rock. It is a coarse highly crystalline compound of black hornblende, 

 and greenish horn-colored feldspar. From the gneiss of Bolton to the talcose conglomer- 

 ates in the north-west corner of Richmond, the following is the order of rocks : 



Talcose schist with Adamsite. Talcose schist. 



Talcose gneiss. Green compact hornblende schist. 



Talcose schist. Talcose schist. 



Gneissoid talcose schist. Novaculite schist. 



Talcose schist (Jonesville.) Clay slate. 



Calcareous talcose schist. Talcose conglomerates. 



Gneissoid rock. 



Prof. Zadock Thompson has the following respecting this range of rocks in Chittenden 

 County : "Along the foot of Mansfield Mountain in Underhill, a thick-bedded mica slate 

 occurs, which makes a very good building stone. The stratification is so completely 

 obliterated, that much of it, like granite, splits in all directions with nearly equal facility. 

 In connection with these beds, seams of chlorite frequently occur. Some of the strata 

 ranging north and south through Underhill, Jericho, Bolton, and Huntington, are of a 

 ferruginous character, and iron ore in small quantities have been found in several places, 

 but not enough to justify the expectation of finding it in quantity. Near this range of 

 ferruginous slate, a narrow range of plumbaginous slate shows itself in several places, as 

 in Huntington, Bolton and Jericho. This is doubtless a continuation of the same narrow 

 range of plumbaginous slate, which occurs in Cambridge, Waterville, and the western 

 part of Montgomery and Richford. 



"To the eastward of the synclinal axis passing through Underhill, and the eastern 

 part of Jericho, the rock perhaps should be called mica slate, although it usually con- 

 tains more or less talc. The rocks on the summit of Mansfield Mountain appear in 

 places, at least, to be talcose slate. A great part of the slate which forms the mountains 

 extending from the chin towards the north along the eastern border of the county, 

 abounds in octahedral crystals of magnetic iron." 



The following are the rocks belonging to the talcose schist in Cambridge, beginning at 

 the eastern border : Talcose gneiss, feldspathic talcose schist, talcose gneiss, talcose schist 

 containing crystals of magnetite and feldspar, novaculite schist, quartzose grit, plumbag- 

 inous shales, whetstone talcose schist, talcose grit, gneiss, talcose schist, talcose sandstones 

 and talcose conglomerates in great amount. 



Upon Section XII, the west range of talcose schist is wider than upon any other section. 

 The rocks are mostly talcose schists and grits, with a few sandstones and novaculite 

 schists. There is very much hematite in the town of Fairfield in this rock. 



The rocks along the northern line of the State from Richford to Franklin are these : 

 feldspathic talcose schist, talcose schist, talcose grit, talcose schist, talco-micaceous schist } 

 talcose grit, talcose schists with hematite and geodic masses, talcose schist, epidotic 

 talcose schist, talcose schist, and novaculite schist. The epidotic schists are the most 

 remarkable and unusual of all these varieties. It is found over an area from two to four 

 miles wide and eight miles long, in Berkshire and Enosburgh. It is probably doubled by 

 a fold of the strata. We cannot state the facts concerning the distribution of the 



