1898-1902. No. 28.] THE CAMBRO-OHDOVICIAN BEDS. 13 



In addition, at one or two places on the west side of Alexandra Bay 

 and at Twin Glacier Valley, smaller portions of limestone have been 

 found which appear to lie near faults, sunken between the older 

 eruptives, and the stratigraphical position of which is unknown. If 

 they correspond to the oldest strata lying on the archsean beds, we 

 here obtain another petrographic development, since the coarse clastic 

 rocks which form the basal beds at ("ape Camperdown are wanting. 



