GEOLOGY OF THE PHILIPSBURG REGION OF QUEBEC 325 



other large gastropods were common. The writer followed the B5 

 beds north to lots 6 and 7 of range 7, where the massive beds of C 

 come in. In Ci, practically the same fauna of thick-shelled forms 

 was collected. This faunal similarity between B5 and Ci is impor- 

 tant because it corroborates the structural evidence that C directly 

 overlies B. There is no evidence of uplift and erosion. 



The massive beds of C, although limited in their exposure, are 

 striking because of their light-colored weathered surfaces and the 

 pecuHar smoothly rounded outcrops. They have been quarried 

 for lime extensively in the past and are known as the "panther" 

 rocks locally. The large coiled gastropods conspicuously outlined 

 on their surfaces probably are the cause of this section's having 

 been assigned to the Chazy, because of a remote similarity between 

 Maclurea ponderosa and M. magna. 



The existence of Logan's C2 between these conspicuous beds 

 of Ci and the conglomerate of D has been doubted by some because 

 of the nearness of outcrops of Ci to Di on the sixth and seventh 

 lots of the seventh and eighth ranges of Stanbridge. Although 

 Di is very poorly exposed, the present writer found indications 

 of black slates in several places underlying the first conglomerate 

 band of D. On lot seven, range seven, a small outcrop of slate 

 was found within stone's throw of Ci on the south and Di to the 

 north. It is probable, however, that Logan's thickness of 170 feet 

 is too great. C2 is probably nearer to 50 feet in thickness. The 

 dips of Ci in this region show the same syniclinal arrangement 

 noticed at St. Armand station. The slope of the trough becomes 

 more gentle to the northeast. 



DIVISION D 



The massive black limestone conglomerates of Di outcrop along 

 the line of the Canadian Pacific Railway on range eight Stanbridge 

 between Stanbridge station and Bedford. The strike here is N.65 E. 

 Conglomeratic bands can be followed from this point northeastward 

 to lot 22 range six Stanbridge. Towards the bottom, Di appears 

 to be in places a massive non-conglomeratic limestone. Three- 

 quarters of a mile on the wagon road east of Stanbridge station, 



