rans Roy Soc Edirf 



Vol. XXXII, Plate CXLIV 



TREASURY ISLAND. 



The arrows indicate the dip. Horizontal beds shown by l — I— i 



N 



SANTA ANNA 



Heights in feet. Depths in fathoms. 



A Coral limestone clip— 80 feet high — with massive corals (marked 4- ) 



imbedded in its base. 

 B Detached masses from the cliff face. , 



C Underlaying soft argillaceous and calcareous rock. 

 D Volcanic Rock "in situ " protruding above the reef fiat. 



Diagram showing the relative position of the raised Coral Rock 

 and its foundation to the mass of Volcanic Rock " in situ " on the 

 reef fiat (north coast of Santa Anna). 



UGI ISLAND. 



Scale of Miles. 



Scale of Miles. 



Fig. 6. 



Section of SANTA AN NA ( W.N. W.-E.S.R) to the 100 Fathom Line. 

 Drawn on a True Scale of 2 inches to the Mile. 



Fig. 2. 



Fig. 4. 



A LEVEL 



Soft Pteropod and 

 Foraminiferous deposit. 



\ ^] Coral limestone. 



Ideal Section of UG1 ISLAND, intended to illustrate the relative thinness c f the Coral Limestone. 



Soft Pteropod and 

 Foraminiferous deposit. 



21 Coral limestone. 



Stirling /"? 



Vole, 



•■arize -ro< 



ck. . 



Ideal Section of TREASURY ISLAND, drawn on a purposely exaggerated scale, and adapted to 

 show the principal structural features of the island. 



C S £. 



J5le.va.teel 

 So, rrier- reef JBa mer- reef 



Ideal 

 of 



Section of ALU, the principal island of the Shortland Islands, showing the relation to each other \==, s&Punpodand 

 the Coral Limestone, the soft Pteropod and Foraminiferous deposit, and the Volcanic Rock. §§§^{ '^y m " l '/ er '"" ' A ? M,t - 



MTarlane fcErck.ne. LnV F.dm 1 



