76 GEOLOGY AND MINERALOGY. 



Some of it is highly fcldspathic, and in other phices mica- 

 ceous. The Adamsite, so named by Prof. Shepherd, was 

 by Dr. Hitchcock, at first, thought to be gigantolite. It 

 appears like lilack granite in places, but is a new mineral. 



The granite, on each side of Willoughby Lake, differs 

 materially. On the east side it is filled Avith veins or 

 seams of great 1)eauty, and which often cut each other. 

 "In the veins, in one boulder, we can trace six periods and 

 including the granite have itself, seven periods of formation, 

 or, as most would say, of injection". (See Geol. Kep. Vol, 

 II, p. 571. Quite a cabinet may be easily collected of 

 dillerent varieties of the granite of the county, and no two 

 similar. "It is, doubtless a metamoi-phic rock." It is, 

 perha[)s, not to be wondered at, that Dr. Hitchcock says, 

 "the rocks of Vermont are the most difficult, with which 

 I have ever attempted to grapi)le." 



Besides the stratified rocks and granite, there are sev- 

 eral triq) dykes of considerable interest, which differ 

 from others found in the state. This is found in Brown- 

 ington, half a mile north of the Congregational Church 

 near Dea. Buxton's. It may l)e called calcareous, feld- 

 spalhic trap. In parts of it, there are im})erfectly formed 

 pentagonal folds or concretions. An immense dyke is 

 found in Albany, near the Lowell road, on land of Mr. 

 Hayden. Several are found in Craftsbury, one of these is 

 near the house of Mr. Person, half a mile south of the 

 Connnon. This is very interesting. It may be traced a great 

 distance. Several others are on land formerly occupied 

 by Mr. Wm. Scott. 



Talcose and chlorite schists, serpentine aud soapstone, 

 Avith a narrow range of clay-schist and novaculite, consti- 

 tute most of the rocks in the western parts of the county ; 

 silicious limestone, clay and hornblende schists, the cen- 

 tral portion ; and granite, syenite and gneiss, the eastern 

 part. 



Gold is found in several towns, in the talcose slate reg- 

 ion, but only in limited quantities. Gold hunting will 

 never be profitable. Silver has been found only in con- 



