382 STRATIGRAPHICAL GEOLOGY. 



highly inclined strata of Bethlehem gneiss (p. 351). Near the four cor- 

 ners, south-west from Indian pond, is a band of quartzite dipping 65° N, 

 60° W. At the school-house by the corners are vertical slates, becom- 

 ing notably minutely contorted beyond. A little north of the road, by 

 J. Stickney's, the dip is 6"]° N. 38° W. The dip is obscure west of T. 

 Ames's, thought possibly to be easterly. At E. Lovejoy's are large loose 

 slabs of siliceous limestone. On the long dome hill beyond, the north- 

 westerly dip is the common one, one observation being 75° N. 34° W. 

 Echo hill is a conical, isolated rock, precipitous on the east side. South- 

 west from it, near T. Ford's, the rock is sandy, dipping 20°-30° N. 40° 

 W. The strike is perceptible here for several rods in extent. On top of 

 Soapstone mountain, which is properly on the section line, the dip is 30° 

 N. 25° W. The mica schist here is full of small contortions, whose axes 

 run north and south, like those on Sunday mountain, showing that the 

 shoving force came either from the east or the west. This moderate dip 

 continues to the soapstone quarry on the southern slope, where it varies 

 from 30°-40° N. 45° W. Some of the layers have a little feldspar; but 

 this soapstone is essentially in the Coos formation. There is a sugges- 

 tion, not yet verified by analysis, that the mineral is agalmatolite. It con- 

 tains the rare brown tourmaline. The bed is forty or fifty feet thick, and 

 is not now worked. 



Next we have a section from Cuba across Sunday mountain to Orford 

 street (Fig. 51). The rocks of Mt. Cuba have been somewhat noticed 

 already. A bunch of mica schist seems to be caught in the quartzite, 

 and there is another mass on the west side below the quartzite. Both 

 these formations rest on the edges of Bethlehem gneiss. Between Cuba 

 and Sunday mountains we find an anticlinal of gneiss in the low country. 

 The first of the mica schists dip 75° N. 40° W. at the union of the four 

 roads. Two miles north, on the strike of the east part of Sunday moun- 

 tain, there is a slight leaning to the west ; and the course of the schists 

 on the north side points towards the curious conical mass. On top of 

 Sunday mountain garnetiferous schists dip N. 30° W. It is a little feld- 

 spathic on the west slope. At the west base of the highest part of the 

 mountain, in a small valley, soapstone crops out, inclined 60° N. 58° W. 

 The same rock occurs on the south-east slope, and there is said to be an- 

 other to the north, thus making four beds of this mineral in Orford in the 



