GEOLOGICAL OBSERVATIONS IN FIJI. 



45 



MUA LEVU 



Figure 20. Geological Sketch Map of Vanua Mbalavu, Exploring Grou]). 



1 — Coralliferous limestone. 2 — Basal calcareous conglomerate. 3 — Coastal 

 sands and mangrove swamps. 4 — Andesitic lavas of the first period. 5 — Basaltic lavas 

 of the second i)eriod. 6 — Ash deposits more ancient than the andesites. 



