NOTES EXPLANATORY OF LETTERING ON THE GEOLOGICAL MAPS. 119 



M. Blocks of Pmites. 



N. Pebbles. 



0. Position in which living Heliopora was found, 7 inches by 6 inches hj 8 inches. 



P. Fragments from 3 inches to 9 inches. 



Q. Rolled blocks on Hurricane Beach. 



R. Clinker field, with deep and numerous small caverns nourishing the large Pukavai trees. 



S. Masses of coral 1 to 2 feet above platform, to which some are cemented. The latter probably 

 represent masses in sitn. of Porifes. 



T. Hard breccia slightly finer than that to the east of it. Dip of the diagonal beds in the breccia at 

 10° to N. 40° E. 



FUNANGONGA (Plate 8). 



B. Big boss of breccia 12 feet by 8 feet, composed of smaller material near the top. 



C. Block of breccia 5 feet 6 inches by 5 feet hy 3 feet. The breccia capping here has many big masses 

 of coral breccia, as at Luamotu and Funafara. 



D. A newer formed rock than the main mass of breccia lies unconformably on it, first as a conglomerate 

 succeeded by a newer breccia, which enclosed blocks appearing to have belonged to the older breccia. This 

 is, however, undergoing erosion in common with the Avhole of the face along here. 



E. Large numbers of fragments, thick as well as thin, of new Heliopora and Milhpora, the former a 

 rich dark blue in colour. These, with a little sand and very little old breccia, constitute most of the 

 beaches between the rampart like projections of breccia. 



F. Large numbers of breccia bosses help to form the upper beaches between the projections. 



G. Cocoanut trees undermined and fallen along this Hurricane Bank. 

 H. Ordinary clinker field with large and small blocks. 



J. Smaller material makes up the clinker field here. 



K. Coarse clinker field. 



L. Coarse blocks of breccia. 



M. Nearly the same as the present beach. 



N. Clinker field. Caverns deep and numerous. 



O. Pebbles. 



FATATO (Plate 8). 



A. Blocks of breccia overturned and inclining to the sea, enclosed in a sandstone and breccia. This has 

 in it old torn up beach blocks, as well as ordinary beach rubble and smaller ddhris ; they are lying at 

 the usual beach angle, and on loose beach stones or pebbles, the underside sloping on the beach, but all 

 undergoing erosion in common with the older breccia sheet. 



B. Big and high block of breccia. 



C. Mass of breccia, the upper portion enclosing various corals which appear to be in situ. 



D. The sandbank here is 13 feet high above high water, and is the highest sand accumulation on the 

 whole of the islets. 



E. Worn pebbles all sizes up to 18 inches in diameter, and some few over. 



F. Smooth worn breccia. 



G. Comparatively smooth clinker field. 



H. Angular and worn blocks of coral breccia, small and large. 

 J. Breccia cap higher than usual, and eroded to its top. 



