THE GILBERT ISLANDS. 



235 



z 



Section East to West. 



^^O'^ 



Ocean Island (Paanopa) is also an elevated coralliferous limestone island, 

 rectangular in shape, about six miles in circuit ; it has the same structure 

 as Pleasant Island ; its highest points are from 260 to 270 feet. 



Ocean Island (PI. 160") is dome-shaped, somewhat flatter from east to 

 west than in a section from north to south, as is shown by the section of the 

 accompanying figure. The slope is somewhat steeper on the weather side ; 

 the island is surrounded by a line of elevated coralliferous limestone cliffs, 

 ranging from 12 to 30 feet in height ; 

 from these the reef flat platform has 

 been cut away. The platform is 

 about 100 yards wide. 



I am indebted to Mr. John Arundel 

 of the Pacific Islands Company for a 

 copy of the Report of Mr. Powers on 

 Ocean (Paanopa) and Pleasant (Nauru) 

 Islands. 



Mr. Arundel was also kind enough 

 to allow me to reproduce a number 

 of characteristic photographs of these 

 islands (Pis. 160% 160"). 



The sections of Paanopa and Nauru 

 Islands are interesting ; they show 

 .admirably that the sink of Nauru 

 and its irregular surface are due to 

 denudation and do not represent the 

 lagoon of an elevated atoll. Paanopa 

 has been greatly denuded and eroded 

 on the flanks, near the shore platform, 

 its dome-shaped surface having been but little modified by atmospheric 

 agencies. In both the i.^lands deep cuts similar to those described at Nine 

 extend inland from the beach edge of the shore platform. 



Ocean Island (Paanopa). 



