3« 



THE FLOOR OF THE OCEAN 



FIGURE 1 6. MAP ILLUSTRATING WITH ARROWS THE OUTFLOW OF THE 

 FENNOSCANDIAN ICE FROM THE CENTER OF ACCUMULATION. 



field observations on which the proof is based are abundant 

 and satisfying. Their gathering and interpretation by the 

 Fennoscandian geologists represent one of the most masterly 

 achievements in earth science. Stage by stage this upheaval of 

 the crust, with truly dramatic effects on geography and biology, 

 has been pictured in rigorous scientific terms. The story is too 

 long for present retelling, but the reality of the crustal recoil 

 can be made clear by the map of Figure 17. It shows the exist- 



