448 THE GKOLOGY OF THE NP:W HEBRIDES, 



to the Efate soapstones, to coarser littoral deposits like the 

 fossiliferous cinder beds of the Foreland, Epi. At Tasiriki, are 

 developed beds intermediate in character between these two, 

 containing abundant marine fossils; a little further to the north, 

 at C. Ukuani (Plate xx.), they are seen passing down insensibly 

 into the agglomerate. On the Atsone is an evenly bedded light 

 yellow variety, dipping 8° S., 70° E., and texturally resembling 

 soapstone, though composed so largely of Globigerina tests as to 

 deserve the title of Globigerina ooze. 



Occasionally, as for example on the north side of the Wai Bubo 

 near the ford, the recent limestone rests either directly on the 

 aforlooierates, or is separated by a few feet only of drift sand 

 rock. 



The regular dip of these beds is about 8° in an easterly 

 direction, showing that since the cessation of the lava-extrusions 

 of the later volganic series, orogenic movements have been of 

 the nature of almost horizontal uplifts. Where we had an 

 opportunity of examining them, these beds did not exceed 100 ft. 

 in thickness; there is little doubt though that in east Santo, 

 where they are thickest, they are to be measured in many 

 hundreds of feet. 



v. Recent Raised Reefs. — The recent raised coral 

 reefs are most extensively developed in the eastern portions of 

 the island, where they form an immen.se elevated tableland 

 sloping gently downwards in a south-easterly direction. The 

 island of Araki and the hill Tumebu (Plate xxi.) are outliers of 

 this formation, exhibiting the characteristic steep slopes descend- 

 ing in three major terraces. 



Towards the west coast the regular terraces lose their distinc- 

 tiveness owing apparently to considerable faulting having taken 

 place since the coral limestone was formed. 



In the Tano Busi Busi district coral limestone was traced to 

 elevations of about 1000 ft. Further north it becomes scanty 

 (Plate xvii.) and past C. Ukuani does not appear at all at heights 

 exceedinj' more than a few feet above .sea-level. At C. Karai to 



