EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA 95 



homogeneous mass of conglomerates. My examination of the sea-wall from 

 the Murailles at Perce to Corner of the Beach, leads me to the impression 

 that the erect conglomerates at the latter place, cut off, as the)' are, to a< 

 narrow shore belt by the Siluric limestones behind, have been downthrown 

 from their nornial position along the zone of great disturbance which has 

 involved the Murailles, Cape Barre, the sea-floor outside the North Beach' 



Bonaventure island, from the Robin bc:t';h, at Perce 



and Perc^ rock. No fact impresses the casual observer more forcibly than 

 the apparent presence of the extensive unconformity between these Bona- 

 venture beds and the lower conglomerates, but the appearance is, I am con- 

 fident, illusive and the Bonaventure conglomerates seem to represent a 

 southern slightly undulated part of the same conglomerate mantle which 

 appears more highly faulted in the anticlines further north. Such an 

 interpretation involves several important conceptions. 



1. These conglomerates were certainly laid down unconformably on 

 the vertical edges of the Devonic and Siluric strata about Perce. 



2. As the Gaspe sandstones of Gaspe Basin have been folded up 

 together with the Devonic limestones of the Forillon, either the Gaspe 

 sandstones of the north are older than the entire series of conglomerates or 

 the folding at the south, which involves the Devonic limestones and the 



' At low tide the strata beneath the water here sliow clearly the existence of a minor 

 fault which has dislocated the beds in such a way that while those to the south of the 

 wharf are parallel to the beds of Mt Joli, at the north of the wharf the angle changes to a 

 much more easterly strike. 



