THE CONTINENT 



It also accounts for the ring of 



ica and Austral-Asia, 



oceanic waters surrounding the Antarctic Plateau. 



Let us now consider where Antarctica fits in among 

 the continents as regards structure (see Figure 9). 



ARCS 



Fig. 9. — Symmetry of the world about an axis of 



EPEIROGENIC (en MASSE) UPLIFT, FROM ANTARCTICA 



THROLTGH Africa to Greenland. (On Mollweide 

 Equal Area Projection with Antarctica added.) 



Note the order of the structures: (i) axis; (2) shield; (3) 

 down-warp; (4) folds; (5) oceanic deeps. 



W. M. Davis * has long ago pointed out that North 

 America and Eur-Asia have many features in common, 

 but arranged more or less symmetrically on each side 

 of the Atlantic Ocean. Thus the Laurentian Shield 



^ W. M. Davis, International Geography, London, 1903. 



85 



