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1	�@�{“¡ –Î, ‰F“s �_ŽO, “àŠC –Î�@�i1990�j�åŠâ’n”M’nˆæ“ì•”�C“û“ª�E�‚‘q‰ÎŽRŒQ•¬�o•¨‚ÌK-Ar”N‘ã. ’nŽ¿’²�¸�ŠŒŽ•ñ�C41�C395-404.	�@Suto, S., Uto, K. and Uchiumi, S. (1990)K-Ar ages of the Nyuto-Takakura volcanic products, southern part of the Sengan geothermal area, northeast Japan. Bull. Geol. Surv. Japan, vol. 41970, 395-404.	931
2	�@�‚‰ª �é—Y, �¡“c �³, ‘å�ê —^Žu’j, �¡–ì �Kˆê, ”Ñ“c ”ü•ä, �{“¡ �O, ”¼‘ò Œb“ñ, “ìŠÙ —L�i1988�j•S–œ”N‚æ‚èŽá‚¢‰ÎŽRŠâ‚Ì‚j�|‚`‚’”N‘㑪’è.�@•¶•”�ȉȊwŒ¤‹†”ï•â�•‹à‘��‡Œ¤‹†�i‚`�jŒ¤‹†�¬‰Ê•ñ���‘�i�º˜a62”N“x�jŒ¤‹†‰Û‘è”Ô�†60303011�Cp.1-43.	�@Takaoka, N. et al.(1988) Absolute age datings of volcanic rocks younger than 1Ma. in 'Res. Rep.Monbusho Sci. Res. Program General Research (A)"Absolute age datings of volcanic rocks younger than 1Ma"', 1-43.	975