wauott] s SUMMARY — MAINE. 267 



Feet,. 



(3) Blackish and gray slate, fine sandstone, and argillaceous limestone ; also, 



compact, feldspathic rock, mixed with limestone of different colors. Not 



well seen 84 



(4) Dark and pale gray slates, with thin layers of quartz, spotted with iron 



pyrites aud mined for gold 66 



(5) Greenish gray, fine-grained, pyritous rock, resembling sandstone and yield- 



ing easily to the knife 19 



(6) Black and gray argillite, full of small twisted layers of quartz, which are 



sometimes so numerous as to coustitute an impure quartzite, spotted with 

 pyrites. Associated with aud overlie dark-blue, plumbaginous argillite, 

 also full of pyritous quartz layers 65 



(7) Bluish-gray, pearly, papery slates, cleft in every directiou aud traversed in 



the bedding and across it by streaks of calcspar and quartz 30 



(8) Bluish felsite, crystalline limestone and quartz, confusedly mixed in con- 



torted beds 37 



(9) Bluish-gray coherent argillite 60 



(10) Greenish, decomposed, feldspathic rock, of uncertain thickness 110 



(11) Red syenite in steeply rising hills • 



725 



The Cambrian rocks occur as long narrow areas resting on the subja- 

 cent Lauren tian rocks, as shown on the map accompanyiug Mr. Fletcher's 

 report of 1876-'77 ; aud on the map accompanying the report for 1875-'7G. 

 In the text of the latter report the rocks are described as they occur on 

 St. Andrew's Channel, and the geographic distribution is given on the 

 map. From a small outcrop on the Mira River a collection of trilo- 

 bites was obtained that indicate the upper Cambrian fauna. They in- 

 clude, as identified by Mr. Matthew, Peltvra scarabeoides, SphccropJithal- 

 mns alatus, and Agnostns pisiformis. 1 It is not certain that all the rocks 

 referred to the Lower Silurian by Mr. Fletcher belong to the Cambrian 

 group, but as far as known all the fossils that have been found indicate 

 the upper Cambrian series. 



MAINE. 



The presence of typical rocks of the Cambrian group in the State 

 of Maine is not yet proved. It is quite probable, as in the case of Nova 

 Scotia, that the series of slates referred to the Cambrian actually belong 

 at that horizon. But until paleontologic evidence is obtained, the 

 question will be an open one. The stratigraphic positiou of the slates 

 and their lithologic character enable us to speak of them tentatively 

 as belonging to the Cambriau group. That they were deposited in the 

 same basin as the Cambrian series of ^ew Brunswick and Massachu- 

 setts is not probable. 



NEW HAMPSHIRE. 



All the references of strata to the Cambrian group in New Hampshire 

 are of a provisional character. They are based upon more or less im- 



1 On the Cambrian faunas of Cape Breton and Newfoundland. Royal Soc. Canada, Proc. and Trans, 

 vol. 4, Bee. 4, 1887, p. 147. 



