476 STRATIGRAPHICAL GEOLOGY. 



lehem gneiss. A section across the valley shows the protogene, and the 

 rocks associated with it. In Westmoreland the gneisses occupy nearly the 

 whole of the south-east part of the town. The principal rock is the pro- 

 togene gneiss ; but the boundary between it and the common gneiss has 

 not been determined. The limits of the gneisses westward, and the prin- 

 cipal places of outcrop, will be noticed further on ; but the rocks of the 

 south-east part of Westmoreland deserve especial notice. The following 

 is the succession of rocks from Samuel Gordon's, just south of the Barker 

 place, to A. Parker's ; and it seems more than probable that they occur 

 here in their natural order, without having been overturned, and without 

 having been pushed very much one over the other. The older rocks 

 form a basin in which these were deposited. Going north from Samuel 

 Gordon's, we have (i) protogene gneiss, — dip, N. 74° W. 22°; (2) horn- 

 blende schist, containing nodules of epidote, — dip, N. iq'^ W. 12°; (3) at 

 J. Tilden's, a foliated and wrinkled gneiss, — dip, N. 9° W. 10°; (4) at D. 

 Hyland's, quartzite, — dip, N. 10° E. 16''; (5) forty rods north of Hyland's, 

 a wrinkled mica schist, with staurolite, dipping N. 80° E. 8°. At Parker's 

 there is a hornblende gneiss, resting on a protogene gneiss, which dips 

 N. 60° W. 25°. These rocks are entirely surrounded by protogene gneiss. 

 A section showing the relation of these rocks can be seen in Fig. 79. 



Protogene gneiss occupies the north-east part of Chesterfield, and 

 it is succeeded on the south by porphyritic gneiss, and on the west by 

 argillaceous and mica schist and quartzites. North-west of the gneiss 

 there are staurolite, siliceous, chloritic, and other schists. On the south- 

 east there is mica schist, generally fine and even in texture, while with 

 the gneiss there are hornblende schists and quartzites. 



Common or Lake Gneiss. The common gneiss occupies the central 

 and south-western parts of Landaff. The gneiss varies greatly in text- 

 ure. In the area between Easton and E. E. Merrill's it is coarse and 

 granular, with an abundance of black mica ; but south of Cooley hill it is 

 somewhat finer, and at the forks of the road from Easton and the old 

 road from the McConnell place, it is followed by mica schist. Where the 

 Easton road crosses the Wild Ammonoosuc there is gneiss, and it outcrops 

 three fourths of a mile east of Danville. Northward, on Cobble hill, we 

 have a hard, greenish rock, probably diorite. It is so jointed that the 

 stratification cannot be determined with any certainty. North of Cobble 



