12 ART. 'S. B. KOTU : 



HjTÎga, Ösuini, aud Satsuma, comprising au area of about oue-tliird of 

 Avliole Kyûsliû (39,659 sq, 7cm.). Poor seams of authracite are iuter- 

 calated iu this complex. 



Both the northerly lying Paleozoicum Pa aud the southerly lying 

 Mesozoicum M in Fig. 2 — the two zones d and e — dip together toward the 

 nortJaoest, and on this account their geological relations are not at all clear 

 to the writer. Topogi'aphically speaking, the boundary of both zones is the 

 liighest elevation (1,820 m.) and water-shed, traversing obliquely the 

 whole breadth of Kyushu. Granitic masses G occur ^vithiu both terranes, 

 one at the southernmost end of Kyushu, the other at Yaku-shima G. 



f) Tlie Tertiary bed occupies only a small patch on tlie east 

 coast; but it builds up the whole island of Tanega-shima (jT in Fig. 2). 

 It is characterized by the presence of OpercuUna, just like the petroliferous 

 Tertiary of central Taiwan. 



In short, the three principal formations a {Ar), d (Pa) and e (31), 

 counting from the north and in the order of age, traverse obliquely the 

 geologic Jiorst of the Kyûshû block (Fig. 2). 



g) Having given an epitome of the principal formations and main 

 geologic structm'e, the writer has still to mention a surficial bed on 

 the Mesozoic (M) and Tertiary (T) terranes, which bed has a great bearing 

 in deciphering the mode of formation of Kagoshima Bay. 



The land sm-rounding the bay is a plateau of lapUli and ash, which 

 attains an altitude of 230 m., and which bounds the shore in sharp 

 perpendicular clifis, as if the bay were a sunken gigantic caldera, for 

 which indeed it was taken by the late F. v. Richthofen. It is the 

 Plateau Formation (La). The bed occupies a greater or lesser portion 

 ot the provinces of Satsuma, Osumi aud Hyûga, comprising an area of 

 1,G50 sq. km. From the terrene rise the Mesozoic slate formation M 

 and granitic masses G in Fig. 2, and it is underlaid aud in part over- 

 laid by volcanic masses, one of the latter being the well-known volcano 

 of Kirishima. 



