354 THE GEOLOGY OF THE LABRADOR COAST. 



from the drainage of the slowly rising continent. All 

 the terraces are unconformable to the marine sands 

 underlying them, though the highest terraces farthest 

 from the coast may have been forming while the more 

 recent sea-beaches were being deposited by the action of 

 the waves and tide. Thus the early part of the Lake 

 period is synchronous with the latter part of the Beach 

 period. So also the lower strata of the Leda clays were 

 laid down during the deposition of the oldest beaches, 

 causing a constant inosculation of these unconformable 

 deposits, and thus the beginning of one epoch overlaps 

 the close of the previous one. 



