66 STRATIGRAPHICAL GEOLOGY. 



which is in well-defined plates, and it is often arranged at various angles 

 to the planes of stratification. On the state line between the Andros- 

 coggin and Wild rivers, a mile and a quarter from the former, on a high 

 cliff, the dip is E. 70°, On Clement brook, a mile from the road, it out- 

 crops, and has an easterly dip. At the lead mine it dips N. 20° W. 60°. 

 The other rocks are granitic gniesses, and it often occurs interstratified 

 with the other gneisses. There is an outcrop a mile up Clement brook ; 

 and there is a conspicuous area a mile west of Shelburne village, where 

 it has been quarried. 



GORIIAM. 



At Gorham village gneiss, the same as that in Shelburne, has granitic 

 gneiss interstratified with it, and it dips N. 60° W, 65°. The gneiss out- 

 crops on Mt. Hayes, but it is largely replaced by intrusive granitic veins. 

 The south end of the mountain ridge, south-west of the village, is granitic 

 gneiss, but the mass of the rock composing the ridge is andalusite schist, 

 that dips N, 30° W. 68°. Two miles west of the village, on the Ran- 

 dolph road, there is a hornblende schist that dips S. 40° E. 62°. In the 

 extreme north part of the town, near the Alpine cascade, the hornblende 

 schist dips S. 45° E. 70°. 



DUMMER AND OdELL. 



In the north-west part of Dummer we find an area of gneiss that has 

 the characteristics of that described in Shelburne ; the dip west of Dum- 

 mer ponds is S. 70° E. 60°. We have also in both sides of the ponds 

 the granitic gneiss of this group. In Odell, in the south-east corner of 

 the town, the dark gray gneiss dips N. 15° W. 35°. This is followed by 

 a granitic gneiss towards Trio ponds. The granitic gneiss also outcrops 

 on Nash stream, near the forks. 



The Montalban in Vermont. 



In the vicinity of Island Pond, and occupying at least the west side of 

 Bluff mountain, there is a mica schist that very closely resembles the 

 Montalban group, as developed in the White Mountains; the dip is S. 

 65° E. 70°. In Brunswick, the North and South Notch mountains are 

 Montalban rocks ; and in the Notch the dark gray gneiss dips westerly. 

 In the west part of Maidstone, on the cast shore of the lake, the charac- 



