GEOLOGIC STRUCTURE OF THE RIÜKIU CURVE. 



19 



Kakeroina-j ima . 



strike. Dip. 



Kinrls of rocks. 



From Oshikaku to Shodon 

 Oshikaku — KachiyoUi 



Kochiyoki — Shokazu 



Shokazu — Ikema 

 Ikoma — Doren 



Doren — Shodun 



From Shodon to Akitoku 

 Shodon — Xomisan 



Xomisan — Akitoku 



From Akitoku to Xishiamuro 

 Akitoku — Sachiyoki 



X— S 



X 20 E 



X— S 



> X 40 E 



rX 40 E 

 X 50 E 



X50E 



X— S 

 ,X 70 E 

 ; X 40 E 



IX 40 E 



X 20 E 

 X 20-40 

 E 

 X 40 W 

 X 30 W 



X 30 W 

 X 60 E 



X— S 



■X 20 E 

 X 20 E 

 X20E 

 X 20-30 

 E 



X 30 E 

 X 20 E 

 X— S 

 X 30 E 



X 40 E 



W65 



X W 70 

 W 40-15 



X W 50 



Slate. 



Alternations of slate and quartzose 



sandstone. 

 Slate. 



Alternations of thin slate and 



quartzite. 

 Slate. 



Bluish sandstone. 

 Slate. 



Quartzose sandstone. 

 Slate. 



Alternations of thin slate and quart- 

 zose sandstone. 

 Slate and quartzose sandstone. 



Slate. 

 Sandstone. 

 Slate. 

 Sandstone. 



Slate and quartzose sandstone. 



Schalstein. 



Slate. 



Sandstone. 

 Bluish sandstone. 

 Slate - 



Bluish sandstone. 

 Quartzose sandstone. 



Schalstein. 

 Slate. 



Quart zosf» sandstone. 



