NOTES EXPLANATORY OF LETTEKING ON THE GEOLOGICAL MAPS. 117 



V. No sand beach here. 



W. The beach along heve viewed from a short distance has a crenulated appearance at low tide, caused 

 by the unequal erosion and solution of the breccia, which now forms headlands and baj's, in shelter of both 

 of which at their base a nai'row streak of foraminiferal sand and debris often rests. Ngie trees grow 

 persistently in this precarious position on the higher parts of the headlands. 



X. Sand floor alternating with fixed and a little loose breccia, all covering, wherc'^'or tested, the dead 

 Hcliopora reef in situ, with the sand between and occasionally over all. 



Y. Where the breccia begins at this j^oint, a fcM^ new coral fragments occur. 



Z. Sand only along here. 



A^ Very recent accumulation of worn foraminiferal sand here. 



B'. Trees undermined and falling along here, the land being probably invaded l>y the lagoon, or from 

 the flow of waters driven l)}' hea^"y weather and high tides through the Tefota passages. Pumice thickly 

 matted -with the roots. 



C^ This flat is composed of lagoon material, as is the flat just across the passage at Telele. 



D^. Outcrop of soft sandstone dipping to passage. 



El. Eroded breccia floor. Recent beach of old coral and breccia fragments. 



F^ Small pinnacles of Forites. on outer platform about 1 foot below high water. 



G^. The breccia is composed of sharp angular lumps of coral, the interstices being occupied by finer 

 material. 



H^. Roots and pumice 2 feet below tojj of Hurricane bank. 



Ji. Breccia eroded nearly to line of beach. 



K^. Landing place. 



L^. Breccia mass, 9 feet by 6 feet by 2 feet. (T.W.E.D.) 



Ml. Ladder of raft washed up here and found August 29, 1897. (T.W.E.D.) 



N^. Recent breach in Hurricane Bank. (T.W.E.D.) 



01. Swamp with floor of shelly sand. (T.W.E.D.) 



pi. This southern end of swamp is a partly tidal, partly non-tidal, flat of gravel, sand and loam, without 

 vegetation. (T.W.E.D.) 



Qi. Numerous sand patches, sometimes of considerable area. 



MAFOLA (Plate 6). 



A. Sand, shingle and small rubble on lagoon side. This island has about twenty small cocoanut trees, 

 some not long planted. 



B. Two kinds of breccia are noticed here, one being chiefly composed of the normal sized masses, and 

 the other of smaller and newer material. This latter, which is chiefly on the lagoon side, apparently 

 overlies the former, which is harder ; both however are now undergoing erosion and occasionally being 

 torn up in small slabs. 



LUAMOTU (Plate 6). 



A. Sand and gravel intermixed and alternating along here. 



B. The breccia rampart in some places forms a battlement and embrasure line. The erosion has been 

 severe. 



C. Breccia cap maintains a remarkably even outer cliff line and surface, the latter forming an almost 

 level platform from the cliff to the beach. 



