GEOLOGY OF THE CONNECTICUT VALLEY DISTRICT. 293 



replaced as before by the chlorite schist. Bands of slate holding large 

 nodules of quartzite occur east of Wheeler's. On Wheeler hill — west 

 side — are hydro-micaceous schists. Near the summit the character is 

 more argillaceous, and the rock carries a little copper. Some of the 

 bands have a chocolate color. The direct road to Dalton from North 

 Littleton is entirely covered by drift ; and the same is true of the river 

 road. The road branching off from the main road, on the south side 

 of Cow brook, gives us a glimpse at green schists, at R. Moore's, with 

 the strike N. 50° E. The same rocks occur abundantly farther east on 

 the north side of the Palmer hill, near a sharp angle in it. On the north 

 side of Morse hill, between L. B. Towne's and the slate quarry of R. 

 Smith, there are green schists, with strike seeming to point to R. 

 Moore's. The results of further examinations in Littleton and Lisbon 

 will appear under the head of the Lyman group, further on. 



A trip across Waterford, in 1858, may furnish a few hints concerning 

 these rocks. At the lower village the hydro-mica schists, minutely con- 

 torted, dip 65° south-easterly. Next is a higher-dipping series of 80° in 

 the same direction, with a multitude of the diabasic porphyritic boulders 

 of the rock yielding Stromatopora, probably in situ. This is followed 

 by soft schists, 80° south-easterly. The west border of the formation 

 stands 85° south-easterly, made of harsh grits and breccias. It is suc- 

 ceeded at the Passumpsic river by clay slate. 



Lyman Group. Early in the history of our explorations it was found 

 needful to separate the "white schists" from the green, or the Lyman 

 from the Lisbon group. When unweathered, the rock usually assumes a 

 drab color, often with an olive-greenish tint, but always, after exposure, 

 becoming grayish-white, somewhat resembling feldspathic rocks at a dis- 

 tance. Somewhat argillaceous and shaly layers, together with dolomitic 

 beds, are interspersed with it, capped by the auriferous conglomerate. 

 According to Mr. Hawes's determinations, this rock is an argillitic mica 

 schist, intermediate in character between mica schist and clay slate, very 

 like the German Wcrthonschicfer, or the first starting away from clay 

 schists. Some of the varieties exhibit a little mica ; more usually, how- 

 ever, the plates are wanting, and the texture reminds one of flint. 



The principal range of this rock commences in the north part of Bath, 

 crosses Smith brook in Lyman, and passes through Lyman into Littleton. 



