34 
Plate II 
Figure 1. Dolomitic limestone and gypsiferous shales of Upper Silurian age. Gypsum cliffs, 
lower Peace river. (Page 15 . ) 
Figure 2. Well-shaped pocket in Silurian limestone filled with fossiliferous Devonian shale. 
Gypsum cliffs, lower Peace liver. (Page 16 . ) 
