GEOLOGY OF THE CONNECTICUT VALLEY DISTRICT. 



333 



was crossed transversely as far as indicated; the eastern slope remains 

 unexplored. The strike varies N. 65° E. to N. 70° E. There seems to 

 be an outcrop of the Lisbon group dipping tow- 

 ard Bluberry hill in the valley east. | 



The slate quarry is a location known to resi- ■§ 

 dents, on account of extensive excavations once •< 

 made there. The slate is of excellent quality, -^ 

 and, were it not for a profusion of cubical crys- | c|. 

 tals of pyrites, would be worth quarrying. It o p 

 dips about 80° south-easterly. Above it on the ?" 

 hill is an interesting conglomerate, with pebbles i- o 

 averaging the size of a hen's egg. This is what | I 

 we have familiarly called the "egg" conglomer- f" s 

 ate. The paste is the slate of the quarry. One t- - 

 pebble is a foot long. Siliceous fragments of a -^p 

 dark color predominate, which seem to have been "^ Z 

 derived from the Lisbon group, as also have been n ^ 

 a few greenish chloritic bits. Others, and possi- \ ^ 

 bly the greater portion, show resemblances to fl- 

 the compact feldspars of the Porphyry group. "„ f- 

 There are small bits of black slate like that oc- \ ^ 

 curring near the east end of Fig 41. ^ §■ 



Two recent visits to the east end of the above \ \ 

 section give the following information respecting | -^ 

 it. Starting from S. Hastings's, Jr., in Littleton, \ % 

 the Huronian rocks were not seen, because cov- '^ \ 

 ered by drift. The slates have somewhat of a 5-^ 

 sandstone aspect, dipping north-westerly up the s w 

 side of the mountain. On top the layers exhibit ? | 

 contortion, and have a more easterly course. The \ "^ 

 east slope is very precipitous for three hundred % « 

 feet; and the strike is fairly east and west, or ? 

 running with the section line for a considerable \ 



a- 



distance, with vertical strata, or 80° southerly. |^ 

 At the base of the precipice are numerous large | 

 Huronian loose blocks. The first ledges seen 



