GEOLOGIC STRUCTURE OP THE RTUKIU CURVE. 39 



Palieozoic rocks, is exposed in the central -and western part of A, and 

 shows a characteristic distributioii in cîontrast with them. Thoujrh 



a 



the Palaeozoic frequently shows various distortions by the eruption of 

 igneous rocks, yet there exists a certain regularity of inclination. The 

 part C is made up of Paheozoic hills with a belt (jf reefs on the eastern 

 nnd western cc^asts. The rocks at the northern end are chiefly 

 pyroxene or anipliibole rocks. Ffiji-banare, which is a rock in the 

 sea to the north of C, is composed also (jf tliese sediments with inter- 

 vening thin layers of slate. They show a dip the same as that on 

 the opposite coast, namely o5° — 55° to 8W 'or »S and a strike from 

 X 70°W t(j E^ — -W. AVhen we trace the Palaeozoic rocks of the eastern 

 coast of C, beginning from the northern end, we üiid numerous distort- 

 ions of strata until we reach Yasura. The followino- shows the 

 measurements of strikes and dips counted soutliwards from the place 

 where a liparite dyke and a propylite sheet are found: 



E-_\V S70°, N'20^E NW3U^ N50°E NW40', 



N35°E NW3Q°, N— S W20°, NOO'^W SW20=, 



£— W S85^, N40°W SW30°, N--S W20°, 



N40°— 4o=W SW30^ 



The pyroxenite with some ([uartzosc sandstone is greatly 

 distorted, but as a whole shows a regular inclination. Rocks exposed 

 between Ya.sura and Hirakul)o are chiefly pyroxenite with the strike 

 N30°— 50°W and the <lip SW l>0'— 30°. On the road from Yasura 

 to the southern end of C, the dip is constant as is shown in the 

 following list, no fault being observed: 



N 30^W SW 40°, N 20°W SW 25°, N 3U°W 8W 15°, 



N 50°W SW 20°, N 30°W SW 20°, E^W S 20°. 



We meet about midway on this road a liparite stock, in contact 

 with Palaeozoic rocks, with however no trace oï disturbance. Thus 



