rC 



The 

 Floor of the Ocean 



New Light on Old Mysteries 



BY REGINALD ALDWORTH DALY 



Sturgis Hooper Professor of Geology, Harvard University 



THE PAGE-BARBOUR LECTURES AT THE 

 UNIVERSITY OF VIRGINIA, I94I 



*:■•-«. 



'v 



Chapel Hill 



THE UNIVERSITY OF NORTH CAROLINA PRESS 



1942 



