50 



Vol. XLIII., Alt. f. — S. T«uboi 



remove the rocks thus forming precipitous chffs around the island. 

 So the. shore of Oshima ends for the most part abruptly with 

 cliffs. Their elevations vary in different parts. The cliff between 

 Nomashi^^ (Ic) and the cape of Sembasaki'^ (Id) in the southern 

 part of the western shore, and that opposite to Fudeshima''^ (3d) 

 in the southeastern part, are especially high, attaining 100 m. 

 and 170 m. respectively. In other parts, the heights of the cliffs 

 usually vary up to some sixty or seventy meters. 



Between Nomashi and Sembasaki the relief of the mountain 

 side as well as that of the sea bottom (notice the 100 fathom 

 line in Fig. 42, p. 110) suggest that, this part once projected far 

 into the sea, and that the high cliff may have been form«3d by 

 the removal of this projecting part by wave erosion. 



Fig. 30. The northward view ot the east cons:. S . . .So;um.'i ro^îks after the 

 foriuiitiou of the escarpment along the east coast- i''. ...Fanô no Taki (a water -fall}. 

 ^4?i ... Central cone lava in 177.S. Oi. Central cjne éjecta. (Fig. 1, :M) 



The formation of the 170 m. cliff at tlie shore opposite to 

 Fudcshima (Fig. 14, p. 2'>) may be explained by the special con- 

 ditions of tliis part. Tliis cliff is at the foot of the steep slope along 



1) ïpig 



2) -fc :^y<K} 



3) »^ 



