506 



THE DISTRIBUTION, ETC., OF ALKALINE ROCKS, 



line. The diagrams illustrating this point are reproduced in 

 figures 1-7 and 10-13. 



Fig.l. — Map of the World showing Distribution of Archaean Deposits 

 (after Lapparent). 



If we now look into this relationship from a broader stand- 

 point other matter of interest come into evidence. Figure 5 

 shows the distribution of alkaline rocks all over the earth. 



ifcO 



Fig.2. — Map of the World showing Distribution of Land and Sea at 

 the End of the Carboniferous (after Lapparent). 



By comparing this chart with Lapparent's map of the world 

 showing the outcrops of Archaean shoreline deposits* (fig.l), 

 some relationship between alkaline areas andJArchsean shores is 

 faintly evidenced. 



