NOTES EXPLANATORY OF LETTERING ON THE GEOLOGICAL MAPS. 115 



K. Breccia defence eroded in jjlaces, and here breaches exist or arc commencing. 

 L. Channel through at high ^yater and rough weather, over breccia which is being eroded. 

 M. Foraminiferal sand point. 

 N. Breach here. 



O. Some small-sized coral rublile about the top, occasionally, when in considerable cpiantity and deep, 

 undergoing solution. 



P. Sand on the beach covering the worn breccia below. 



Q. All along these breaches erosion is in active operation. 



E. No distinct beach. 



S. Loose breccia blocks torn up from the breccia sheet and platform, and driven shorewards. 



MOTUSANAPA (Plate 5). 



A. Several big bosses of breccia, one 7 feet above high water, with smaller broken fragments of coral on 

 its upper part. 



B. The erosion in these breaches is very marked, and actively proceeding. 



TELELE (Plate 5). 



A. Big boss of breccia, 20 feet by 12 feet by 10 feet, above high water, capped by many kinds of fine 

 and thick corals, apparently in situ, but with more or less weathered and 1)roken tops, which appear to 

 have been for a long time supported and protected by imperfectly cemented breccia filling ; this support 

 has been the first to be gradually removed by solution, and has left the finer firm corals standing, as now 

 seen. In their lower parts these bosses show uneven bedding, approximating to the horizontal. In their 

 upper parts no stratification is recognisable. 



B. Breach commencing through here. The high breccia rampart is not yet worn down from this point 

 eastwards. 



C. Good-sized pebbles of pumice on the soil. 



C^. Fragments of pumice are found 13 feet np the Hurricane Bank, i.e., 3 feet below what is, a short 

 distance away, the summit, this being the highest spot on the island. 



D. Large boss of breccia here 9 feet above high water. 



E. Very large blocks of breccia. 



F. The erosion along here is most marked and severe, the longitudinal channel in the erosion zone 

 being both deeper and -sncler than elsewhere observed, and the massive cakes removed from it are now to 

 be seen at the base and up the side of the wide Hurricane Beach. 



G. Much of the surface of this island is composed of similar material (shells, sand, and debris) as the 

 lagoon beach adjoining. 



H. Fine breccia, inclined to present channel. 

 J. Boss of Pontes in situ. 



K. Soft sandstone of similar material to new beach sand, ^ 10° to basin or passage. 

 L. Soft sandstone of similar material to new beach sand, ^ 10° to basin. 

 M. Foraminiferal sand, with a large proportion of Cardium fragum. 



N. Patches of Chama imhicata are found here and there over the HcJiopora reef, of 100 j'ards or more 

 in diameter. 



TEFOTA (Plate 5). 



A. Breach-channel at half tide. 



A^. Canoe passage or channel through breccia at half tide. 



Q 2 



