322 J. H. BRADLEY, JR. 



to distinguish which part of A3 is being dealt with. The Hthology 

 of the two members is well described by Logan. 



Following the black beds of A36 northeastward, the strike is 

 seen to curve slowly to the east. At Morgan's Corners they are 

 disrupted and turned up on end. Back of the schoolhouse at this 

 place, beds of A3& are seen to strike due east- west and to dip north- 

 ward gently. Following this strike eastward, the beds shortly 

 assume the vertical position. A little east of the schoolhouse the 

 black A3& beds have in contact with them to the south, the hght 

 grey to white, crystalline to granular, beds of lower members. The 

 inference would be that the pressure which bent the rocks to the 

 east along their strike across range 10 of St. Armand, finally caused 

 the beds to break at this point. The rocks to the north of the fault 

 were upthrown and turned vertically. 



Following east, the black beds of A3& fold over an anticlinal 

 axis associated with beds of A2. This fact leads to the conclusion 

 that the faulting at Morgan's Corners was a result of pressure which 

 died out in the direction of the anticline. If this is true, the disloca- 

 tion in A3 and A2 at Morgan's Corners cannot be of great extent. 



Scarcity of fossils in Division A. — It is unfortunate that in Ai, 

 2, and 3, with an assigned thickness of 700 feet, organic remains 

 should be so rare. A careful search failed to discover in this entire 

 thickness any remains of undoubted organic origin. Some few 

 gastropods in a poor state of preservation and determinable only on 

 the broadest generic lines, were found by former investigators. 

 The scarcity of fossils has made the correlation of these lower beds 

 exceedingly difi&cult. It is clearly evident from field observation 

 that the A and B series are unbroken structurally. We have no 

 evidence of uplift and erosion between A and B. Likewise, there 

 is no evidence that A and B are separated by a fault. As a matter 

 of fact, the separation of these beds into A and B on a structural 

 basis, is wholly arbitrary, and a more logical arrangement would be 

 to include A and B in the same series. On the other hand, some 

 of the strata in B are highly fossiliferous. These fossiliferous beds 

 of St. Armand and Stanbridge are the only reliable means of obtain- 

 ing any light on the age of the rocks in Division A, so that in the 

 absence of any break in deposition between A and B, the writer 



