REPORT OF THE STATE PALEONTOLOGIST I903 I5I 



the Grand Coupe, as well as in Le Coule as just stated. In the great 

 sea front of Red peak, the high face rising 660 feet over the 

 water is believed to bring up the lower gray limestones in conformity 

 and, though these beds are difficult of access and have not been 

 properly studied, it is likely that here are the strata which fill the 

 broken interval between the Perce beds and those beneath, the rocks 

 of Cap Barre and perhaps also in part those of Cap Blanc. 



As a whole, we may say of the Perce beds that though they are 

 now but remnants left by recent rapid and profound changes in 

 topography, due to the tremendous destructive energy of the sea, 

 and their surfaces, both on the Perce rock and in the Murailles, are 

 the slopes of lost mountains, yet they have been subjected to dis- 

 turbances in themselves much greater and much more ancient, wit- 

 nessed by their difference in inclination and their tremendous 

 displacements. These displacements we shall endeavor to portray 

 more particularly in summing up the evidence relating to the geologic 

 structure of the region. 



There is little evidence yet on which to base any kind of sub- 

 division of the Perce rock mass, either from its fossils or its rocks. 

 The yellow beds seem to bear in greater abundance the prolific 

 species Chonetes canadensis, Leptostrophia 

 irene, Chonostrophia etc., and the red layers the trilobite 

 remains, Spirifer arenosus, S. murchisoni, etc., 

 but this occurrence is open to constant exception.^ 



Cap Barre beds. In first considering the limestones of Perce rock 

 we have started with the latest of the limestone deposits. In close if 

 not immediate succession beneath them seem to follow the gray 

 schists exposed only at Cap Barre, the southernmost and lowest 

 point of the Murailles. 



These beds consist of thin, sandy, blue gray limestones with inter- 

 calated shale, the rock becoming reddish at the top beneath the soil 

 cap. They dip northeast 30° to 40°, which is an angle not repro- 



^Most of the fossils from the Perce rock described by Billings were evi- 

 dently picked np loose at the foot of Mt Joli whither they are washed in 

 great quantity from the rock itself. Hence Billings, not personally acquainted 

 with the situation, frequently cites Mt Joli as a locality of these fossils which 

 is misleading for the Joli mass is of very different age. 



