BERNAEDSTON SERIES OF UPPER DEVONIAN. 299 



face of the hill west of Moutiig'ue ;i coarse gaeiss showing' traces of cou- 

 glomerate structure rises out of these saudstoiies and is most nearly allied 

 to the coarser rocks at the mouth of Millers River, with which I have asso- 

 ciated it on the map. (See p. 362.) 



Along- the fault line northward from the mouth of Millers River across 

 Northfield, the older gneisses rise from beneath the sands in many places 

 up to, but not beyond, the line of the fault, while the few outcrops of the 

 Bernardston series approach the same line on the west until, opposite 

 Northfield village, in L. A. Moody's lane, the Devonian quartzite, identical 

 with that west of the river on the Williams farm, here greatly brecciated 

 and its fissures filled with hematite, approaches very near to the older rocks, 

 and the same thing is true northward along the road which skirts the moun- 

 tain to and beyond the State line, where the fault enters the older rocks, as 

 shown on the map, PI. XXXIV. 



The quartzite, greatly brecciated, and veined with hematite, can be 

 traced in several places into near proximity to the older series. It is a fine- 

 grained rock which shows no signs of derivation from the varying members 

 of the older series against which it successively rests. It fails to conform to 

 them in dip and strike, and these facts, combined with its thorough breccia- 

 tion along this whole line, make it probable that the Bernardston series is 

 bounded on the east by the extended fault which has been traced north and 

 south from Millers River. 



