62 



most important specimens are two fragmentary Illaenus- 

 like trilobites. These belong to an undescribed genus and 

 species, but the same form is known from the Upper Cam- 

 brian of Missouri. This same species was found in a 

 similar conglomerate at St. Phillip de Neri, 31 miles (50 

 km.) west of Riviere du Loup, but at that locality the 

 greater number of the pebbles contained fossils of Lower 

 Cambrian age, while at Riviere du Loup, no definitely 

 Lower Cambrian fossils have been found. The Upper 

 Cambrian age of the pebbles in the conglomerates is 

 indicated by all the fossils so far found here. In what 

 seem to be these same shales at St. Pascal, Richardson 

 many years ago found graptolites of Beekmantown (Levis) 

 age". 



The evidence of the fossils as given above by Dr. Ray- 

 mond indicates that the strata of division 1 are not older 

 than Upper Cambrian and that they may be of Beekman- 

 town age. 



The boundary between the strata of division 1 and those 

 of division 2 which outcrop along the river below the rail- 

 way bridge, has been somewhat arbitrarily chosen. From 

 the road which leads from the railway station northwards 

 along the west bank of the river, the red shales and asso- 

 ciated strata of the rock cutting along the railway on the 

 east side of the river, are visible, From this road beyond 

 the railway crossing, an occasional glimpse of the red shales 

 outcropping along the river below the railway may be 

 obtained. At a point a short distance below the dam, 

 the red strata abruptly cease and are succeeded by dark 

 rocks which belong to division 2 and outcrop along both 

 banks of the river to a point below the falls. 



The strata of division I outcropping along the east side 

 of the river below the railway bridge consist of dark shales 

 with sandstone beds and zones of red shale dipping up- 

 stream at high angles. What seems to be a minor fault 

 bounding a zone of red shales has been chosen as the bound- 

 ary between divisions 1 and 2. On the north side of this 

 fault, the strata of division 2 consist of dark, nearly black 

 shales with thin beds of grey limestone, \ to 1 inch (10 to 

 25 mm.) thick, dipping upstream at an angle of 6o°. The 

 thin limestones, in places, are disrupted and form lenses. 

 Below this point, as far as the brink of the falls, the strata 

 with the exception of several minor bands of red shales, 

 consist of dark shales interstratified with beds of light 



