Koto, Archœan Formation. 



Jour. Sc. Coll. Vol. V. PI. XX I \/. 



N S 



» 3 J/:; Km « 



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 Hiffa.shi-Shirnhatrii (,\7ri' . 



f'Jji':po.vitre- at OùsuAsa/ 





ià I 



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> 9 Km 



Lith. dt Imp, Seishibunaha. 



