Age M Volcano-Tephra Stratigraphy 0.061 M2.7 KusatsuShirane-15W 1 cm above -14W 0.118 M2.7 KusatsuShirane-14W 0.217 M4.5 Asama-A 5 cm below the present surface 0.227 M3.6 NiigataYakeyama-1773 7 cm below the present surface 0.351 M2.8 NikkoShirane-1649 15 cm above Ikaho 0.4 M3 Asama-A' 5 cm below -A; 6 cm above -B 0.446 M3.1 Hakusan-1554 0.456 M2.4 Hiuchi-Shirahikemizu 5 cm below surface; 10 cm above Ikaho 0.590 M2 Nasu-1410 2 cm above -1408 0.592 M2 Nasu-1408 12 cm above Ikaho 0.639 M3.5 NiigataYakeyama-1361 6 cm below -1773 0.892 M5.1 Asama-B 18 cm below -A; 10 cm above Shibukawa 1.112 Yatsugatake-Otsuki debris avalanche 1.113 M4.2 NiigataYakeyama-Hayakawa 1.182 Akagi-Niisato debris avalanche 1.46 M4.9 Haruna.Futatsudake-Ikaho 3 cm above Shibukawa 1.49 M4.8 Haruna-Shibukawa 15 cm below the present surface 1.65 M4.4 Asama-C 3 cm below Shibukawa 1.990 M2 KusatsuShirane-13.9D slightly above -13.8WL 1.999 M3 KusatsuShirane-13.8L 8 cm below -14W 2 M4 Yakedake-Nakao 2 M3.6 NiigataYakeyama 2.000 M2 KusatsuShirane-13.7D immediately below -13.8WL 2.5 M3 KusatsuShirane-13D 2 cm above -12L 2.5 M2.9 Tateyama.Jigokudani-4 above -3 2.6 M2.8 Nasu-Chausu (scoria) above Omaru 3.0 M4 KusatsuShirane-12L (Sessho lava) 10 cm above Kumakura 4 M2.7 Tateyama.Jigokudani-3 above Akahoya 4 Haruna-Ushiikegawa 2 lahar 40 cm above Ushiikegawa 1 4.78 M4 Myoko-Otagiri 12 cm above Asama-D 5 M0 Nikko.Mitsudake lava domes below Ikaho; above ShichihonZakura 5.60 M3 Asama-D 13 cm above Akakura 5.60 M2.5 KusatsuShirane-Kumakura mixed with Asama-D; 5 cm above Asama-E 6.0 M3.7 Washibaike-unnamed 5 cm (peat) above Akahoya 6.30 M5.8 Towada-C 6.3 M4.0 Takahara.Fujiyama below Ikaho 6.50 M4 Myoko-Akakura 3 cm above Asama-E 6.6 Nasu-Omaru ignimbrite 6.81 M3.7 Asama-E 15 cm above Akahoya 7.330 M8.1 Kikai-Akahoya 8 M2 Tateyama.Jigokudani-2 below Akahoya 8.7 M4.4 Norikura-Kuraigahara 63 cm below surface; 15 below Akahoya 9 M2 Tateyama-Jigokudani 1 below Jigokudani 2 9 M3 KusatsuShirane-9L below Kumakura; above -8L 10 Myoko-Taguchi debris avalanche 10 M3 Shiga.Shigayama 10 cm below Akahoya; above Hirahara (YPk) 10 M0 Haruna.Mizusawa lava dome 80 cm below Shibukawa 11 Haruna-Ushiikegawa 1 lahar 25 cm above Hirahara (YP) 11 M3 KusatsuShirane-8L above 7L 13 Takasaki lahar 25 cm above Hirahara (YP) 13.5 M3 KusatsuShirane-7L above Hirahara (YPk) 14 M4 Asama-Soja 15 cm above Hirahara (YP) 14.9 M5.6 Nikko.Nantai-ShichihonZakura/Imaichi 10 cm above Hirahara (UG) 15 Norikura.Kengamine cone 70 cm below Kuraigahara 15.9 M6.0 Asama-Hirahara (YPk/YP, UG) 17 M4 KusatsuShirane-5.8L 10 cm below Hirahara (YPk) 17 M4 Nikko.Nantai-Kutsukake 1 below Imaichi; above Kutsukake 2 17 Akagi-Nakahara debris avalanche 65 cm above Shiraito 19 Nasu-Osawa ignimbrite 18.6 M5 Asama-Okubozawa 2 10 cm above Okubozawa 1; 30 cm below Hirahara (YP) 19 M4 Nikko.Nantai-Kutsukake 2 above Kutsukake 3 19 M4 KusatsuShirane-5.6L 25 cm below 5.8L; 75 cm above Itahana 19.6 M5 Asama-Okubozawa 1 30 cm above Kumoba 20 M3.7 Shiga.Hachiyama scoria cone below Hirahara (YPk) 21 M4 Nikko.Nantai-Kutsukake 3 above Kutsukake 4 21 Haruna.Soma-Jinba debris avalanche between Hirahara (YP) and Shiraito 21 M5.3 Asama.Koasama-Shiraito 50 cm below Hirahara (YP); 25 cm above Itahana 3 22 M4 Nikko.Nantai-Kutsukake 4 above Ogawa 23 M3.7 Nasu-Oshima 1 30 cm below Osawa ignimbrite 22.6 M4 Asama.Hanareyama-Kumoba 7 cm below Shiraito; 7cm above Itahana 3 23.3 M5.0 Asama-Itahana 3 10 cm above Itahana 2 23 M4.9 Nikko.Nantai-Ogawa 100 cm below Imaichi; 110 cm above Kanuma 23 M4 Nikko.Nantai-Oshima 2 5 cm below Oshima; 45 cm above Tazawa 24.3 M5.3 Asama-Itahana 2 (Tsukahara) 7 cm above Itahana 1 25.0 M5.5 Asama-Itahana 1 15 cm above Itahana 0 26.0 M4.5 Asama-Itahana 0.5 10 cm below Itahana 1; above Itahana 0 26.5 M5.2 Asama-Itahana 0 15 cm above Tanzawa 28.00 M8.3 Aira-Tanzawa MIS3.1 30 Akagi-Nishikubo debris avalanche between Itahana and Kanuma 30 M4.6 Myoko-Kan'noki 16 cm below surface; 65 cm above Sekiyama 30 M4.7 Yatsugatake.Tateshina.Yokodake-4 20 cm below Tanzawa 31 M4 Haruna-Katsuhozawa 35 cm below tanzawa; 80 cm above Hassaki 33 M5.7 Akagi-Kanuma 70 cm above Hassaki 37.3 M4.2 Myoko-Sekiyama 3 cm above Kanemata 37.6 M3.9 Myoko-Kanemata 20 cm above Rokugatsu 39.9 M3 Kurohime-Rokugatsu nuee ardente 65 cm above Odaira 42 M5.2 Haruna-Hassaki (Murota ignimbrite) 40 cm above Yunokuchi 42 Nasu.Ofujiyama debris avalanche between Tanzawa and Oshima 4 42 M3 Nasu-Oshima 3 280 cm below Oshima 2 43 M4.0 Nasu-Oshima 4 15 cm below Oshima3; 50 cm above Namegawa 45 M5.4 Akagi-Yunokuchi 18 cm above Namegawa 1 47 M5.1 Akagi-Namegawa 1 10 cm above Namegawa 2 47.2 M4.5 Kurohime-Odaira 25 cm above Kurayoshi 48 M5 Asama.Ikenotaira?-Mine 45 cm below Yunokuchi; 20 above Kurayoshi 48 M5.3 Akagi-Namekawa 2 10 cm above Kurayoshi 49.85 Ontake-Kisogawa debris avalanche above Kurayoshi 50.00 M6.9 Daisen-Kurayoshi MIS3.3 50 Norikura.Yotudake lava dome 52 M6.1 Hakone-Tokyo 13 cm below Kurayoshi 54.9 M5.3 Akagi-Mizunuma 1 54 cm below Namegawa 2 55.0 M5 Asama.Kagonoto-Nakanojo 4 60 cm below Kurayoshi; immediately below Mizunuma 1 57 M3 Nasu-Kuromori 55 cm below Kurayoshi 58 M4.9 Akagi-Mizunuma 2 32 cm below Mizunuma1 60 M5 Asama.Kagonoto-Nakanojo 3 35 cm below Nakanojo 4 60 M3.8 Akagi-Mizunuma 3 12 cm below Mizunuma 2; 87 cm above Mizunuma 4 60 M3 Myoko-Matsugamine nuee ardentes 50 cm below Kurayoshi 65 Ontake-Yashikino between Sekigane ad Mitake 65 M4 Asama.Kagonoto-Nakanojo 2 30 cm below Nakanojo 3 70 M5.4 Akagi-Okkai between Mizunuma 3 and 4 70 M4 Akagi-Nagai 2 nuee ardente 300 cm below Hassaki 72 M5.7 Ontake-4 30 cm above SenbonMatsu 75 M5.4 Tateyama-E 60 cm below Matsugamine; 110 cm above -D 76 M4 Kurohime.Isemiyama cone 10 cm below Tateyama-E 76 M5 Ontake-SenbonMatsu 70 cm above -3 80 M5 Akagi-Mizunuma 4 87 cm below Mizunuma 3; 70 cm below Mine 80 M4 Akagi-Nagai 1 nuee ardente 30 cm below Nagai 2; 110 cm above Ontake-1 82 M5 Ontake-3 45 cm above Ina 83 M5.3 Ontake-Nagawa 70 cm below Tateyama-E; 40 cm above Katamachi; 5 cm above HigashiAkata 83 M6 Daisen-Namadake 85 M5 Akagi-Mizunuma 5 30 cm below Mizunuma 4 85.6 M5.1 Nikko-HigashiAkata 1 5 cm below Nagawa; 10 cm above HigashiAkata 2 86.9 M5.1 Nikko-HIgashiAkata 2 1 cm above Aso-4 87.00 M8.4 Aso-4 MIS5.2 89 Ontake-Otaki 90 Ontake.Younger edifice 93 M6.0 Ontake-Ina 16 cm above Tozurahara 94 M5.8 Ontake-Katamachi 30 cm above -1; immediately above Tozurahara 95 Hakusan.older edifice 95 M7.5 Kikai-Tozurahara 110 cm below Mizunuma 4; 20 cm above Ontake-2 95.1 M4 Asama.Kagonoto-Nakanojo 1 90 cm below Nakanojo 2; 1 cm below Tozurahara 97 Ontake-2 17 cm above Ontake-1 99 M6.6 Ontake-1 100 cm below Aso-4 103 M7 Ata MIS5.4 103 M6.7 Sanbe-Kisuki below Tozurahara 115 M7 Aso-3 30 cm below Ontake-1 120 Ontake-Kamitaru 52 cm below -1 127 M5.3 Akagi-Mizunuma 6 5 cm below Ontake-1; 15 cm above Tateyama-D; 84 cm below Mizunuma 5 127.1 M5.6 Nikko-Mamiana immediately below Mizunuma 6 130 M6.0 Tateyama-D 40 cm below Ontake-1 130 Asama.Takatsuya lava 131 Myoko-Hanabusa (Shibuegawa ignimbrite) immediately below Tateyama-D 132.9 M4.9 Nikko-Ogikubo 20 cm below Mamiana 133 M4 Akagi-Mizunuma 7 immediately below Ogikubo 140 M4 Akagi-Mizunuma 8a 30 cm below Mizunuma 7 140 Nasu.Futamata lava 147 M5.1 Akagi-Mizunuma 9/10 35 cm below Mizunuma 8a 150 M5.4 Yatsugatake-Kawakami about 100 cm below Tateyama-D 150 M5 Akagi-Fujimi 220 cm below Ontake-1 155 M4 Nikko-Yumihari 1 below Mizunuma 9/10; below Yumihari 2 158 M4 Nikko-Yumihari 2 above Yumihari 3 163 M4 Nikko-Yumihari 3 above Yumihari 4 168 M4 Nikko-Yumihari 4 above Yumihari 5 170 M5 Akagi-Omama ignimbrite 160 cm below Mizunuma 6 173 M4 Northern Kanto-Yumihari 5 20 cm above Sotome 176 M5 Numazawa-Shibahara between Yumihari 5 and Sotome 180 Akagi-Ishiyama debris avalanche 50 cm below Omama 180 Akagi-Tachibanayama debris avalanche below Hassaki; probably below Karasawa 180 M5.3 Nikko-Sotome 187 M4.7 Nikko-Yumihari 6 20 cm below Sotome 189 Numata conglomerate damed up by Tanashita ignimbrite 190 M5 Akagi-Tsukuda ignimbrite 200 cm below Fujimi 195 Takayashiro 197 M4.8 Takahara-Shikabatake 30 cm below Yumihari 200 Iizuna-Kamitaru 200 M5 unknown-Ishizuhara between Tateyama-D and Karasawa 204 M5.4 Takahara-KitaAkata 20 cm below Shikabatake 210 M5.2 Nikko-Namegawa 120 cm below Sotome 220 M5.2 NIkko-Yaita 60 cm below Namegawa lahar 220 M4.7 Nasu-Shirakawa 1 70 cm below KitaAkata 220 M5 unknown-Tagashira 40 cm below Shirakawa 1 220 M4 Haruna-Jumonji 100 cm below Ishizuhara 224 Nikko-Namegawa lahar 12 cm below Yaita 225 M5 Haruna-Miyazawa ignimbrite 50 cm below Jumonji 230 M4.9 Nikko-Yumihari 7 30 cm below Yaita 230 Asama.Kagonoto-Takahanezawa debris avalanche below Ishizuhara; above Karasawa; in Tsumagoi lacustrine 240 Shiga-Namizaka lava 245 M4.4 Nikko-Yumihari 8 50 cm below Yumihari 7 249 M6 unknown-Karasawa 4 cm above Torihama 250 Takayashiro.Meshimoriyama 250.0 M7 Ata-Torihama MIS8.2 251 Tumagoi lacustrine intercalating Ishizuhara and Karasawa 252 M4.6 Nikko-Yumihari 9 15 cm below Yumihari 8 259 M5.0 Nikko-Yumihari 10 20 cm below Yumihari 9; immediately above Nasuno (Minohara) 260 M6.0 Yatsugatake-BBP above -Lw.O.P. 260 M6 Azumaya-Minohara 130 cm below Karasawa 260 M6 Nasuno (probably same as Minohara) 260 cm below Mamiana; 220 cm above Suiendani-A3 261.9 M5 Yatsugatake-Lw.O.P. 262 M7 Hirose-4 (probably same as Aso-1.1) 1 cm below Lw.O.P. 262 M8 Aso-1.0 20 cm below Minohara; between Takayashiro-j and -k 264 M7 Hirose-3 (probably same as Aso-1.0) 18 cm below -4 267 M3.8 Nasu-Shirakawa 2 20 cm below Nasuno (Minohara) 276 M4.6 Nasu-Shirakawa 3 35 cm below Shirakawa 2 279 M4 Haruna-Oto 5 120 cm below Aso 1.0 282 M4 Haruna-Oto 4 20 cm below Oto 5 285 M4 Haruna?-Nagafuji 6 20 cm below Oto 4 295 M5 Tateyama-C 30 cm above -B 300 Norikura-Kikyogahara lava 300 M4.1 Nasu-Shirakawa 4 18 cm below Shirakawa 3 300 M5 Tateyama-B 250 cm above Suiendani-A3 300 M5 Asama.Kagonoto?-Nagafuji 5 110 cm below Nagafuji 6 301 M6 unknown-Nanamagari below Shirakawa 4; 5 cm below Shirakawa 3 302 M5.2 Takahara-UbazawaKita 3 cm below Nanamagari; 300 cm above Suiendani-A3 306 M5 Asama.Kagonoto?-Nagafuji 4 40 cm below Nagafuji 5 309.9 M5 Yatsugatake-Lwst.O.P. 310.0 M6 Suiendani-Hirose 2 300cm above "A" Creek debris avalanche 314 M4.4 Nasu-Shirakawa 5 30 cm below UbazawaKita 318 M4 Haruna?-Nagafuji 3 90 cm below Nagafuji 4 320 M4 Haruna?-Nagafuji 2 10 cm below Nagafuji 3 324 M4 Haruna-Oto 3 30 cm below Nagafuji 2 325 M4 haruna-Oto 2 10 below Oto 3 326 M4.7 Nasu-Shirakawa 6 30 cm below Shirkawa 5 326 M4 Haruna-Oto 1 20 cm below Oto 2 329 M5 Haruna?-Nagafuji 1 20 cm below Oto1; 40 cm above Suiendani-A5 330 M4 unnamed scoria between Shirakawa 6 and 7 331 M5.0 Nasu-Shirakawa 7 23 cm below Shirakawa 6 333 M6 Hiuchi?-Origuchihara 7 cm below Shirakawa 7 334 M4.2 Nasu-Shirakawa 8 5 cm below Origuchihara 335 M6 Suiendani-Negoya 1 above Kakuto 335 M5 Suiendani-A5 540 cm below Minohara; 20 cm above Kakuto 336 M5.0 Nasu-Shirakawa 9 12 cm below Shirakawa 8 337 M5.0 Nasu-shirakawa 10 8cm below Shirakawa 9; 20 cm above Takaku 337 M5.0 Nikko-Shiobara 1 40 cm below Shirakawa 7 339 M4.7 Takahara-Shiobara 2 5 cm below Shirakawa 10 339 M6 Yatsugatake-"A" Creek debris avalanche 10 cm (silt) above Kakuto 340.0 M8 Kakuto MIS10; between Suiendani-A5 and -A4 342 M4.8 Nikko-Shiobara 3 13 cm below Shiobara 2 345 M5 Suiendani-A4 20 cm below Kakuto 349 M4.6 Nikko-Shiobara 4 30 cm below Shiobara 3; 1 cm above Suiendani A3 350 M6 Suiendani-A3 25cm below -A4 350 Azumaya-Manzagawa lava above Oshi 350 Asama.Yunomaru lava 353 M6 Chugoku-HIkage 10 between Suiendani-A3 and Hikage 9 357 M5 KusatsuShirane?-Hikage 9 between Hikage 10 and Suiendani-A2 359.9 M5 Yatsugatake-Hirose 1cm above Suiendani-A2 360.0 M6 Suiendani-A2 40 cm below -A3 360 Asama.Nabebutayama laba 360 M6 Hiuchi?-Takaku 30 cm below Suiendani-Au; 30 cm below Shirakawa 10 365 M7 Kyushu?-Hikage 7 below Kakuto; above Suiendani-TE5 366 M4 KusatsuShirane-3P 150 cm above Suiendani-A1 366 M6 Nikko-Yaguchi 18 cm above Suiendani-A1 367 KusatsuShirane-Aoba lava immediately below -3P 370 Hakusan.Kagamuro 370 M6 Suiendani-A1 40 cm below -A2; 150 cm above -TE5 371 M6.6 KusatsuShirane-Oshi ignimbrite 40 cm below -2C 375 M4.6 Nasu-Shirakawa 11 60 cm below Takaku 375 KusatsuShirane-Horaguchi lava below Oshi 380 Takahara-unnamed lava 140 cm below Suiendani-A3 385 M4.6 Nasu-Shirakawa 12 20 cm below Shirakawa 11 385 M5 Haruna-Nakamura 40 cm below Suiendani-A1; 70 cm above -TE5 390 M5.7 Akagi-Moka 170 cm below Suiendani-A3 400 M6 Chugoku?-Chikato in peat 4 m (silt) above Suiendani-TE5 400 M5 unknown-Kurotawara 35 cm below Moka; 35 cm below Shirakawa 12 420.0 M7 Suiendani-TE5 420 M6 Suiendani-Okuhida ignimbrite 425 M5 Haruna-Tegomaru 100 cm below Suiendani-TE5 425 M5 Yatsugatake-Ogano 5 32 cm below Suiendani-TE5 435 M5 Yatsugatake-Ogano 4 50 cm below Ogano 5 455 M4 Yatsugatake-Ogano 3 100 cm below Ogano 4 460 Nasu-Kuroiso debris avalanche 380 cm below Takaku 475 M5 Yatsugatake-Ogano 2 100 cm below Ogano 3 485 M5 Yatsugatake-Ogano 1 42 cm below Ogano 2 495 Odamaki conglomerate 40 cm below Ogano 1 500 M6 Tateyama?-Taniguchi ignimbrite 500 M4 Haruna-Hagyu 2 250 cm below Tegomaru 501 M4 Haruna-Hagyu 1 10 cm below Hagyu 1 505 M5 KusatsuShirane-Naganohara 7 15 cm below Hagyu 1 510 Shiobara lake caldera lake formed by Otawara ignimbrite 520 M5 KusatsuShirane-Naganohara 6 80 cm below Naganohara 7 520 M6 Takahara-Otawara ignimibrite unconformably 250 cm below Otawara 524 M6 unknown-ImaiToge 25 cm below Naganohara 6 526 M5 KusatsuShirane-Naganohara 5 528 M5 KusatsuShirane-Naganohara 4 530 M6 unknown-Nemoto 13 30 cm below Otawara 532 M5 KusatsuShirane-Naganohara 3 534 M5 KusatsuShirane-Naganohara 2 536 M5 KusatsuShirane-Naganohara 1 540.0 M8 Kobayashi-Sakura MIS13.3 550 M6 unknown-Nemoto 14 below Nemoto 13 570 KusatsuShirane.Mtsuozawa cone 570 M6 JoShinEtsu-Misawa 100 cm below Sakura 570 M6 unknown-Nemoto 16 below Nemoto 14 590 M5 unknown-Hoshinomiya 50 cm above Sakuyama 600 M5 unknown-Sakuyama 300 cm above Hoshitoge 610 M5 Onoko-Takayama ignimbrite 180 cm below Misawa 640 unknown-YG10 above Hoshitoge 650 M6 Hoshitoge (probably same as Toriitoge) 800 cm below Otawara 650 Shiga-Yokote laba 650 M7 Kaisyo-Kamitakara ignimbrite 650.0 M7 Kaisyo-Toriitoge MIS16; 200 cm below Onoko-Takayama 660 M5 Azumaya-Manzagawa pumice below Toriitoge 670 Asama.Komagamiyama cone 670 M6 Azumaya-Ochiaibashi ignimbrite below Toriitoge 700 Otake.Older cone 750 Azumaya-Oyokogawa lava 760 Madarao 770 M5 Azumaya-Oyokogawa 3 150 cm below Oyokogawa lava 780.0 B/M boundary MIS19.3 800 Wadatoge rhyorite dome 810 M7 unknown-Uonuma Pink 870.0 M8 Shishimuta-Azuki below B/M boundary 970 Asama.Sasadoyayama 1000 M8 Shishimuta-Pink Jaramio epoch 1000 Dainitigatake 1100 M7 unknown-Takigasawa 1750 M8.2 unknown-Fukuda (Ebisutoge ignimbrite) 1800 M7 unknown-Nyukawa ignimbite several m below Fukuda (Ebisutoge ignimbrite)