482 STRATIGRAPHICAL GEOLOGY. 



Messenger's. We then follow it southward, near J. Kimball's and west 

 of Cold pond. The rocks have everywhere an easterly dip. They vary 

 somewhat in strike, but are quite uniform, generally running north and 

 south, and have the coarse granular texture of the common gneiss. In 

 the gneiss near E. Cutting's there is a coarse granite vein ; and we also 

 have a quartz schist associated with the gneiss at the forks of the road 

 near S. Walker's. The band crosses the road near J. G. Smith's. It is 

 quite uncommon to find the quartz schist running across the gneiss, as 

 here, and it shows clearly its unconformability with the gneiss, and its 

 more recent origin. Going eastward from A. C. Sleeper's, we have (i) 

 mica schist, with a dip of S. 50° E. 15°; (2) a quartzite, with a dip of S. 

 70° E. 20°; (3) a mica schist, with staurolite, dipping S. 20° E. 20°; (4) 

 gneiss, with a dip of S. 30° E. 20°, — showing not only that the schist 

 and quartzite have been inverted, but that the gneiss has been pushed 

 over them. The common gneiss extends southward from Unity and 

 Goshen into Acworth and Lempster. It occupies a strip a mile and a 

 half to two miles in width in the east part of Acworth. A line bounding 

 it on the west extends south from a point west of Cold pond, around the 

 west base of Coffin hill. It crosses the road near J. Davis's, and runs 

 near Mitchell pond and school-house No. 7. Keeping east of the road 

 across Grant hill, it crosses Cold river near Wyman's saw-mill, and con- 

 tinues southward around the west side of Gates mountain. In Lempster, 

 it occupies the whole of the north part of the town, but it keeps to the 

 west of Lempster mountain. In the south-east corner of the town we 

 find the schist and gneisses of Lempster mountain, and the porphyritic 

 gneiss to the south-east of these. The common gneiss sends out an out- 

 lier on the road near William Gee's ; but the schist is found on the road 

 by Beaver pond ; so we have a very narrow strip of gneiss, if any, in the 

 extreme south-west corner of the town. 



South of Acworth and Lempster this great band of common gneiss, 

 which we have followed southward from Landaff, loses, in a great meas- 

 ure, its well defined limits. As the isolated area of gneiss that extends 

 from the Connecticut to the north-west part of Alstead, and which has 

 been described upon page 410, passes into the micaceous gneiss of the 

 White Mountain series on the south, so here, as we go southward from 

 the northern boundary of Alstead and Marlow, the character of the rock, 



