12 "^''.1 XLIII., Art. 6. — S. TsnbM: 



Plachinoo'- (2b), Kôtsiikr^ (3b), Itônashi'^ (2b), on tho northeast 

 and Futago'- (2d), Takenohira"^ (2e), on the southeast. Two small; 

 explosion- craters, Habu"^ (3e) and Hikubo'^ (3e), are at the south- 

 eastern foot. 



Besides these, there are, along the western half of the north- 

 ern coast, small igneous bodies strikingly demohshed which are 

 considered to have been born in the middle of the volcanic history 

 of the island and are now structurally separated from the main 

 body of the somma. 



Tho top of the somma is truncated with a ring-wall that 

 surrounds a liugc oval caldera. The wall is not completely closed 

 but th(.'re arc two gaps, a greater one on the northeastern and a 

 smaller one on the southwestern side. 



The active central homate Miharayama'^ (2c) stands in tho 

 -caldera and its volcanic products not only cover the ground within 

 the encircling wall but have also spread down to the sea shore 

 through the gaps in the wall. 



The structural scheme above outlined may be sliowui in a 

 tabular form as follows : — 



Tlie somma— A liomate truueated at its top 

 Avith a ring-wall surrouudiug si 

 The inaiu body -^ caldera, -with p:irasitic cones and 



I explosion-craters on its flanks, 



'The central cone (Miliarajama) — A homate 

 with an active crater, standing in 

 the caldera. 

 Tlie demolished igneous bodies along the western half of the 

 northern coast of the island.— The small satellitic 

 igneous l)odies which are considered to have l)eeu 

 formed during the development of the somma. 



Volcano 



Oshima 



