XIII SAVU-SAVU PENINSULA 189 



submarine basic tuffs of the lower slopes which may in part be the 

 result of marine-erosion and the grey rhombic-pyroxene-tuffs of the- 

 upper levels which are probably derived from subaerial eruptions. 



The Savu-savu Peninsula 



I include in this district the promontory west of Naindi Bay 

 and Sava-reka-reka Bay. Although its surface is much cut up, it 

 has, when viewed from a distance, a fairly even profile and attains 

 a maximum height of rather over 800 feet. From the region east 

 of it, it is separated by the Naindi Gap. Here one can cross the 

 peninsula between the two bays above named without rising more 

 than 50 feet above the sea. The elevated interior is divided into 

 two parts, which are divided by a col, about 250 feet in elevation, 

 which is ascended in crossing from Naithekoro on the south coast 

 to Na Kama on the north coast. Much of the surface is clothed 

 with the usual " talasinga " vegetation. Close to the north shore, 

 with which it is connected by the reef-flat, rises the small island of 

 Na-Wi, and off the extremity of the peninsula, which is known as 

 Harman's Point, is the islet of Naviavia, formed of raised reef- 

 limestone as described on p. 8. The celebrated boiling springs 

 known as Na Kama are situated on the north coast opposite 

 Na-Wi. It may be remarked in passing that besides finding an 

 exit in the springs, the hot water oozes through the beach and 

 below the tide-marks for several hundred yards along the shore^ 

 These springs are described in detail on p. 25. 



This is one of the few districts of the island in which elevated 

 reef-masses occur at the sea-border. These old reefs, which attain 

 a maximum elevation of 250 feet above the sea, are principall)r 

 restricted to the neighbourhood of Naindi Bay. (They are referred 

 to in detail in Chapter II.) But they indicate only a part of the 

 submergence which this region has experienced. There is an 

 exposure of a very interesting rock in a stream-course that is 

 crossed on the road from Yaroi to Naindi, less than a mile from 

 the first-named place, and about 30 feet above the sea. Here we 

 find a dark, impure " Globigerina " limestone, or, as it might be- 

 also designated, an altered calcareous palagonitic clay-tuff.i The 

 larger fragments in it average only "2 mm,, and it affords evidence 

 of a period of submergence during which the hill-tops of the 

 Savu-savu Peninsula were below the sea-level. 



We get the same indication, but in a more pronounced degree^ 

 * It is described under Sample C on p. 325. 



