REPORT OF THE STATE PALEONTOLOGIST I903 I4I 



In the region about Perce the presence of Hmestones corresponding 

 to those at Gaspe " on the horizon of the Lower Helderberg and 

 Oriskany " [Geol. Can. 1863. p.439] was noted by Logan in con- 

 nection with his rapid but very lucid sketch of the geology of the 

 coast section from Gaspe to the Bay of Chaleurs. Some lists of 

 fossils were given, though these have only in part been verified by 

 subsequent identification, Mr Billings having described a goodly 

 number from the uppermost horizons represented in the Perce rock. 



The vertical strata of Perce rock 



On analyzing the relations of the various limestones and shale 

 masses exposed about Perce, based specially on the character of the 

 fossils, we shall find in the massives now dissevered either by topog- 

 raphy or displacement, the key to their geologic structure not in 

 their apparent relations, their attitude one toward another, but here 

 again, as ever, in the nature of their fossil contents, which in them- 

 selves afford the solution to the geologic enigma of the region. 



Perce' rock massive. The tinted strata of Perce rock, standing 

 almost erect, or according to Logan, overhanging the perpendicular 



