6o 



vician age since the Sillery was thought to overlie the Levis. 

 By Logan, the grey sandstone (No. 4) was thought to be 

 possibly older than the Sillery. By Richardson, the first 

 three divisions (Nos. 1 to 3) were assigned to the Lauzon 

 (a subdivision of the original Sillery) but guided by the 

 assumed general structure, it was thought possible that the 

 lower portion of the three divisions (Nos. I to 3) might 

 be Levis. The age of the first three divisions was thought 

 to be Lower Ordovician, while division 4 was assigned 

 to the Potsdam (Upper Cambrian) and thought to uncon- 

 formably underlie the upper three divisions. By Ells, 

 and later by Bailey and Mclnnes, the four divisions were 

 classed with the Sillery now thought to underlie the Levis 

 and to be of Upper Cambrian age. 



The strata of division I as displayed in the neighbour- 

 hood of the railway station and along certain streets 

 east of the river, consist chiefly of red, green, and black 

 shales with beds of sandstone and occasional beds of 

 limestone or limestone conglomerate. The strata uniformly 

 dip in a southeasterly direction at angles varying between 

 45°and8o°. 



On the east side of the river along the street leading 

 southerly from the highway bridge over the stream, are 

 outcrops of banded red and dark shales followed by thin 

 bedded, dark grey shales and grey sandstones. The strata 

 dip S. 30 E.,* angle, 70 . Farther on approaching the 

 first street leading to the east, relatively wide bands of red 

 shale alternate with others of a dark grey colour. These 

 are followed by a 20-foot zone of thin limestone beds 

 alternating with dark shales. 



On the street leading to the east and past the first road 

 leading to the north, are exposures of banded, red, green 

 and dark purple shales. The strata dip S. 35 E. On the 

 second road leading to the north, no exposures occur until 

 a point is reached about opposite the church. From this 

 point northwards to the end of the street, there is a long 

 series of exposures showing the general character of the 

 rock assemblage. 



From this general neighbourhood a splendid view is 

 obtainable of the Laurentian mountains bordering the 

 north shore of the St. Lawrence, 20 miles (30 km.) away. 



*A11 directions tof dip are" referred to magnetic meridian. 



