Age M Volcano-Tephra Stratigraphy 0.030 M1 AkitaKoma-1970 0.112 M3.4 Bandai-1888 0.13 M3 Zao-Togatta 10 0.16 M3 Zao-Togatta 9 0.19 M3 Zao-Togatta 8 0.199 M2 Chokai-1801 0.268 M2 Iwate-Yakebashiri lava 0.314 M2.5 Iwate-1686 0.322 M2.4 AkitaYakeyama-1678 above Towada-A 0.35 M3 Zao-Togatta 7 0.456 M2.4 Hiuchi-Shirahikemizu 10 cm above Ikaho 1.00 M2 AkitaKoma-unnamed 0.5 cm above Towada-A 1.054 M7.4 Baitoushan-Tomakomai 3 cm above Towada-A 1.085 M5.7 Towada-A 1.15 M3 Zao-Togatta 6 1.194 M3 Bandai-806 below -1888, above -C 1.2 M2.6 AkitaYakeyama-unnamed below Towada-A 1.35 M4.3 Zao-Togatta 5 50 cm above Towada-C 1.46 M4.9 Haruna.Futatsudake-Ikaho 1.9 M4.9 Towada-B 10 cm below -A 2.465 Chokai-Kisakata debris avalanche 2.8 M3 Banda-C above -D 2.9 Kanpu-unnamed above Tanzawa 3 M3 AkitaYakeyama-Tamagawa Onsen 4 Zao-Togatta Fan 2 4 M3 Bandai-D above Numazawa 5 Iwate.HigashiIwate cone 5.6 M5.5 Numazawa above Towada-C 6.30 M5.8 Towada-C (Chuseri) 5 cm above Akahoya 6.31 M3 Azuma.Kofuji immediately below Towada-C 7 M3 Towada-D' above -D 7 Bandai-E below Numazawa; above Akahani Cone 7.330 M8.1 Kikai-Akahoya 8 M4.3 Towada-D 21 cm below -C 8 AkitaKoma-Horikiri 9.5 M5.1 Towada-E 15 cm below -D 11.5 M5.5 Hijiori-Obanazawa 12 M5.0 Towada-F 25 cm below -E 12 M4.4 AkitaKoma-Yanagisawa 13 M4.4 Towada-G 13 M4.8 AkitaKoma-Koiwai 14 M5.8 Towada-Ninokura 15 M6.7 Towada-L (Hachinohe) MIS2.2; 77 cm above -M 15.9 M6.0 Asama-Hirahara MIS2.2 22 M5.8 Towada-M 62 cm above Tanzawa 23 M4.3 Zao-Togatta 4 45 cm above Tanzawa 25 M3.7 San'nomegata immediately above Tanzawa 28.00 M8.3 Aira-Tanzawa MIS3.1 30 M6.7 Towada-N 16 cm below Tanzawa 33 Iwaki.NishiIwate-Takizawa 36 M4.4 Zao-Togatta 3 70 cm below Tanzawa 40 M5.1 Iwate-Yukiura 40 M5 Bandai-Hayama 1/Okinajima DA 100 cm above Kurayoshi 40 M4 Adatara-Nihonmatsu 1 40 cm above Nihonmatsu 2 41 M5.5 Towada-O 126 cm below -N 42 M5.5 Towada-P 13 cm below -O 42 M4.6 Zao-Togatta 2 (Kawasaki) 40 cm below Togatta 3 43 M6.1 Towada-Q 15 cm below -P; 140 cm above -U 45 M4 Adatara-Nihonmatsu 2 30 cm above Kurayoshi 47.00 M4.2 Zao-Togatta 1 45 cm below Togatta 2 47.01 Zao-Togatta Fan 1 immediately below Togatta 1 50.00 M6.9 Daisen-Kurayoshi MIS3.3 50 M5.2 Towada-SP 55 M5.5 Numazawa-Kaneyama 15 cm below Kurayoshi; 92 cm above Aso-4 57 M4 Adatara-Nihonmatsu 3 below Kurayoshi; above Asa-4 60 M5.3 Towada-Okoshi 60 Bandai-Kijikozawa debris avalanche 70 M5.3 Towada-QP 70 M5.4 Akagi-Okkai 10 cm above Hayamawa 2 70 M4.2 Ichinomegata below Tanzawa 72 M5.0 Yakeishi-Yamagata immediately above Murasakino 72 M5.4 Yakeishi-Murasakino above Aso-4 75 M5 Bandai-Hayama 2 12 cm above Nagawa 75 Iwaki?-Fukaura 80 M6.0 Narugo-Yanagisawa 80 M5 Towada-T17 83 M5.3 Ontake-Nagawa 20 cm above Aso-4 84 M5.6 Towada-Kawaguchi 20 cm above Aso-4 87.00 M8.4 Aso-4 MIS5.2; betwee Towada-T17 and -Aosuji 93 M5.7 Towada-Aosuji 78 cm above Kasutera 95 M7.5 Kikai-Tozurahara MIS5.3 96.0 unknown-Kitahara between Aso-4 and Ontake-1 96.5 unknown-Atago immediately below Kitahara 99 M6.6 Ontake-1 MIS5.3; 120 cm (marine sand) above Kisuki 99 M5.6 Towada-Kasutera 76 cm above Toya 100 M5.9 Narugo-Nisaka 100 M3 Ninomegata 103 M6.7 Sanbe-Kisuki MIS5.4; above Toya 105.0 M7.4 Toya 20 m (marine sand) below Aso-4 105.5 M4.9 Towada-Zarame 2 6 cm below Toya 110 M6.0 Adachi-Medeshima 50 cm below Aso-4 110 M5 Towada-Zarame 1 115 M6 Hakkoda?-Ottomo 90 cm below Toya 125 M6 Hakkoda?-Katchi 80 cm below Ottomo; 50 cm above MIS5 marine 130 M5.4 Narugo-Ichihazama below Toya 150 M5.2 Adatara-Dake 150 unknown-Iwadeyama below Ichihazama 170 unknown-Magarizaka below Iwadeyama 176 M5 Numazawa-Shibahara 500 cm below Namegawa 190 uknown-Nakazato 3 below Magarizaka 210 uknown-Nakazato 2 below Nakazato 3 215 uknown-Nakazato 1 below Nakazato 2 220 M6 uknown-Shimoyamazato below Nakazato 1 240 M5 Numazawa-Tagashira 120 cm below Shibahara; 250 cm above Shirakawa 8 250 M6 Onikobe-Ikezuki above Takamori 17 250 M7 Ata-Torihama MIS8.2 255 M6 Aso-1.1 70 cm (peat) above Aso-1 260 M6 Azumaya-Minohara MIS8.2 262 M8 Aso-1 MIS8.2; middle of the Shibikawa formation 340.0 M7 Kakuto MIS10 344 M6 Hiuchi?-Origuchihara immediately above Shirakawa 8 350 M6 Suiendani-A3 360 M6 Suiendani-A2 370 M6 Suiendani-A1 370 M6 unknown-Takamori 17 120 cm above Takamori 16 410 M5 Onikobe-Takamori 16 120 cm above Takamori 12 420.0 M7 Suiendani-TE5 MIS11 440 M5 Onikobe-Takamori 12 5 cm above Takamori 11 442 M4 Onikobe-Takamori 11 55 cm above Takamori 8 448 M7 Baitoushan-Oga 50 m (marine sand) below Aso-1 450 M6 unknown-Jizodaira 450 Kurikoma-Kabutoyama ignimbrite 450 M5.1 Togawan (-Jizodaira?) 20 cm (peat) below Oga 456 M6 unknown-Wakimoto 60 cm (peat) below Togawan 460 M5 Onikobe-Takamori 8 32 cm above Takamori 7 470 M7 Hakkoda-2 ignimbrite 100 cm below Jizodaira 470 M4 Onikobe-Takamori 7 50 cm above Takamori 5 485 M4 Onikobe-Takamori 30 cm above Takamori 4 495 M4 Onikobe-Takamori 4 500 M4 Onikobe-Takamori 3 10 cm above Takamori 2 503 M4 Onikobe-Takamori 2 10 cm above Takamori 1 506 M4 Onikobe-Takamori 1 200 cm above fluvial gravels 530 M6 unknown-Nemoto 13 30 cm below Otawara 540.0 M8 Kobayashi-Sakura MIS13.3 550 M6 unknown-Nemoto 14 570 M6 unknown-Nemoto 16 600 M7 Hakkoda-1 ignimbrite 650.0 M7 Kaisho-Toriitoge MIS16 780.0 B/M boundary MIS19.3 800 Hatoriko-Kamabusayama ignimbrite 870.0 M8 Shishimuta-Azuki MIS22 900 Hatoriko-Ten'ei ignimbrite 900 unknown-Shibutami 1000 Hatoriko-Nishigo ignimbrite 1300 M7 unknown-Kumado ignimbrite