GEOLOGY OF THE CONNECTICUT VALLEY DISTRICT. 39I 



between Sleeper's and Cranberry pond, dipping 35° S. 40° E. Near the 

 pond I have seen some of the Hmestone. Between it and the quartzite 

 is a band of shining mica schist, which dips 65° S. 40° E. On Blood's 

 brook the greenish calciferous schists are made to extend to school-house 

 No. 16; then come the clay slates before alluded to, while all the Coos 

 schists, both those containing staurolite and others, are confined to the 

 area between the slates and quartzite of Grantham mountain. 



In Cornish, on the road over Croydon mountain (Fig. 62), the stauro- 

 lite schists overlie the Calciferous, dipping 50° E. into the mountain. On 

 their western flank, mica schists, without very much staurolite, seem to 

 be interstratified with quartzite ; and there is a band of the schist on the 

 very apex of the mountain, at the trigonometrical station. The stauro- 

 lite schist east of the slate quarry, close by the east line of the town, dips 

 55° S. 80° E. Taking the road over the south end of Croydon mountain, 

 from Cornish to Newport, there is a perplexing succession. Leaving the 

 main Calciferous, with a high south-easterly dip, argillaceous schists may 

 follow for half a mile, passing into the Calciferous ; then a band of stau- 

 rolite rock, with the same dip, to O. Fletcher's. For a mile along the 

 road the genuine Calciferous reappears as far as Wm. C. Poole's, where 

 large veins of pure white quartz show themselves. These look like large 

 snow-drifts, from a little distance. From here to the gneiss, mica schist, 

 holding staurolite crystals in abundance, is the only rock seen. At first 

 the dip is 28° southerly, then only 15° N. 70° E., with gray sandstones. 

 Ledges similar to the last are at a charcoal furnace in the edge of New- 

 port. East of A. Ward's, Croydon, the mica schist of the gneiss group 

 dips 75° N. 70° E. 



The cat hole road in Claremont affords a display of staurolite ledges 

 similar to those just mentioned at the south end of Croydon mountain. 

 Leaving clay slates at the road fork between Bald and Green mountains, 

 they dip 85° N. 5° W. about a quarter of a mile below the summit, and 

 70° E. at the latter locality. Within a distance of eighty rods the strike 

 changes ninety degrees. Still farther east on this road, quartzite appears, 

 and the staurolite rocks cease. This range seems to be pinched out to 

 the south of Green mountain, but reappears south of Sugar river, a mile 

 east of Claremont village, and southerly along Quabbinnight brook, with 

 high easterly dips. This rock widens much in proceeding southerly. 



