REPORT OF THE STATE PALEONTOLOGIST I903 



149 



the Blowhole, a sea cavern gnawed out by the waves, the tinted Perce 

 strata again appear, but here lying at a steep angle, 20° to 40° to 

 the southeast and abutting palpably against the thrust plane of a 

 fault which is well marked in the face of the cliff, sloping obliquely 

 downward and to the north. The line of displacement is well en- 

 forced by the contrast in color between the downthrown yellow and 

 red strata and the more somber grays of the Cap Barre massive. 

 Logan noted the fact that these downthrown strata were of equivalent 

 age and probably a part of the Perce rock, and Ells cites the occur- 



Section at Blowhole. Cap Barre beds at left, downthrown Perce beds at right 



rence in the rocks at the Blowhole of the fossils Spirifer are- 

 no s u s and S. cyclopterus (probably S . m u r c h i - 

 s o n i ) ; we have also found 



Dalmanites perceensis 

 Phacops logani 

 Acidaspis sp. 

 Megalanteris plicata 

 Chonetes canadensis 



Leptocoelia flabellites 

 Leptostrophia irene 

 Chonetes hudsonicus 

 Spirifer arenosns 

 S. murchisoni 



and a few others, but the specimens are not very well preserved nor 

 are they in any wise so abundant as at Perce rock. 



These Perce beds about the Blowhole are probably again down- 

 thrown in themselves in their further extension along the Murailles 

 but without essential change of dip, for this same southward dip is 

 well expressed in the angle of the landward slope of the cliff and is 

 apparent as far as Le Coule on Barre brook where Perce fossils were 

 also found. The latter seem to be the summit beds of the limestones 

 and from them the following species were obtained. 



Spirifer arenosus 

 S. murchisoni 

 Chonetes canadensis 

 C. hudsonicus 



]\Iegalanteris plicata 

 Leptostrophia irene 

 Coelospira 



