5940 : Akita and Oga
| 1 | |
a | Quaternary | Holocene | Alluvium | Mud; sand and gravel | |
| 2 | |
sd | Quaternary | Holocene | Sand dune deposits | Sand | |
| 3 | |
Vd | Quaternary | Pleistocene-Holocene | Mud flow deposits; volcanic detritus; etc. | Andesite block; gravel; sand; mud; etc. | |
| 4 | |
Vg | Quaternary | Pleistocene-Holocene | Megata Volcano | bsalt pyroclastic rock; etc. | |
| 5 | |
Vi1.2.3.4 | Quaternary | Pleistocene-Holocene | Iwate(Vi4); inukura(Vi3); Omatsukura(Vi2) and Marumori(Vi1)Volcanoes | (Olivine-)pyroxene andesite lava; (pyroxene-)olivine basalt lava and pyroclastic rock | |
| 6 | |
Vy1.2.3 | Quaternary | Pleistocene-Holocene | Yakeyama(Vy3); Tsugamori(Vy2) and shibakura(Vy1) Volcanoes | (Olivine-)pyroxene andesite lava and pyroclastic rock | |
| 7 | |
Vk1.2.3 | Quaternary | Pleistocene-Holocene | Komagdake(Vk3); Eboshi(Vk2) and Takakura(Vk1) Volcanoes | (Olivine-)pyroxene andesite lava; pyroxene-oivine basalt lava and pyroclastic rock | |
| 8 | |
Vh1.2.3 | Quaternary | Pleistocene-Holocene | Hachimantai(Vh3); Chausudake(Vh2) and Obukadake(Vh1) Volcanoes | (Olivine-)pyroxene andesite lava and pyroclastic rock (with olivine-pyroxene basalt lava) | |
| 9 | |
Vp | Quaternary | Pleistocene-Holocene | Kampu Volcano | (Hornblende-olivine-)pyroxene andesie lava and pyroclastic rock | |
| 10 | |
Vm | Quaternary | Pleistocene-Holocene | Moriyoshi Volcano | (Olivine-)pyroxene andesite lava and pyroclastic rock | |
| 11 | |
Va | Quaternary | Pleistocene-Holocene | Kayo Volcano | (Olivine-)pyroxene andesie lava and pyroclastic rock | |
| 12 | |
td | Quaternary | Pleistocene | Terrace deposits | Mud; sand and gravel | |
| 13 | |
Ka.Tm | Quaternary | Pleistocene | Area along Japan Sea | Katanisi Formation(Ka) Toga Pumice Bed(Tm); etc. | Gravel; sand and mud(Ka); pumice tuff(Tm) |
| 14 | |
Sb | Quaternary | Pleistocene | Area along Japan Sea | Shibikawa and Takaoka Formations; etc. | Sandstone and sand(with acid tuff; gravel; lignite; etc.) |
| 15 | |
Is | Quaternary | Pleistocene | Area along back-bone like range | Ishigedozawa Formation | Sandestone; conglomerate and siltstone |
| 16 | |
Yo | Quaternary | Pleistocene | Area along back-bone like range | Yoshizawa Formation | Sand; gravel; mud and tuff |
| 17 | |
Vb | Quaternary | Pleistocene | Daibutsu Volcano; Matsukawa Andesites; etc. | (Olivine-)pyroxene andesie lava and pyroclastic rock | |
| 18 | |
Da4 | Late Miocene-Pleistocene | Kantomori and Ainaizawa Formations; etc.(Tamagawa welded tuffs; etc.) | Pyroxene dacite welded tuff; etc. | ||
| 19 | |
Ac | Late Miocene-Pleistocene | Kantomori and Ainaizawa Formations; etc.(Tamagawa welded tuffs; etc.) | Conglomerate; sandstone; acid pyroclastic rock; etc. | ||
| 20 | |
R4 | Late Miocene-Pleistocene | Kantomori and Ainaizawa Formations; etc.(Tamagawa welded tuffs; etc.) | Pyroxene-hornblends rhyolite welded tuff; acid tuff-tuff breccia; etc. | ||
| 21 | |
Ss | Neogene | Pliocene | Area along Japan Sea | Sasaoka and Wakimoto Formations; etc. | Sandstone and siltstone(with acid tuff) |
| 22 | |
Ts | Neogene | Pliocene | Area along Japan Sea | Tentokuji and Kiaura Formations; etc. | Siltstone and sandstone(with conglomerate and acid tuff) |
| 23 | |
Ms | Neogene | Pliocene | Area along back-bone like range | Motohata Formation | Sandstone; conglomerate and siltstone(with acid tuff and lignite) |
| 24 | |
Da3 | Neogene | Pliocene | Haguroyama Decites; etc. | Biotite-hornblende dacite pyroclastic rock(with lava) | |
| 25 | |
An2 | Neogene | Pliocene | Fukuyama Andesites | Hornblende-pyroxene andesite lava and pyroclastic rock | |
| 26 | |
Hs | Neogene | Late Miocene | Area along back-bone like range | Miyata; Hanayama and Yumoto Formations; etc. | Sandstone; mudstone and dacite tuff(with conglomerate and lignite) |
| 27 | |
R3 | Neogene | Late Miocene | Area along back-bone like range | Osuke Formation | Rhyolite pyroclastic rock |
| 28 | |
Fs | Neogene | Late Miocene | Area along back-bone like range | Koshidomae; Yamatsuda and Kurosawa Formations; etc. | Sandstone; mudstone; conglomerate and acid tuff |
| 29 | |
Fm | Neogene | Late Miocene | Area along Japan Sea | Funakawa Formation | Dark grey mudstone(with sandstone and acid tuff) |
| 30 | |
Ft | Neogene | Late Miocene | Area along Japan Sea | Funakawa Formation | Acid tuff(with mudstone; andesite pyroclastic rock; etc.) |
| 31 | |
R2 | Neogene | Late Miocene | Yunokosiyama Rhyolites; Yunosawa Rhyolites; etc. | (Hornblende-bearing biotite-)rhyolite lava(with pyroclastic rock) | |
| 32 | |
Da2 | Neogene | Late Miocene | Moriyama Decites | (Angite-bearing biotite-)hornblende dacite lava | |
| 33 | |
An1 | Neogene | Late Miocene | Manaitayama Volcanic Rocks; etc. | (Olivine-hornblende-)pyroxene andesite lava; pyroclastic rock; etc. | |
| 34 | |
Om | Neogene | Late Miocene | Area along Japan Sea | Onnagawa Formation | Hard mudstone (with sandstone and acid tuff) |
| 35 | |
Os | Neogene | Late Miocene | Area along back-bone like range | Otaki Formation; Kotsunagizawa Formation; Sannai Formation; etc. | (Hard)mudstone; sandstone and acid tuff |
| 36 | |
R1 | Neogene | Late Miocene | Futamata Rhyolites; Tsukushimori Rhyolites; etc. | (Biotite)rhyolite lava | |
| 37 | |
Da1 | Neogene | Late Miocene | Yakushiyama Decites; Megamiyama Decites; etc. | Augite-hornblende dacite lava | |
| 38 | |
Bs | Neogene | Late Miocene | Aizen Basalts; Yakushiyama Basalts; etc. | (Olivine-)pyroxene basalt lava; olivine basalt lava and pyroclastic rock | |
| 39 | |
Do | Neogene | Late Miocene | (Pyroxene-)olivine dolerite(-basalt) | ||
| 40 | |
Qd | Neogene | Late Miocene | Odai Quartz diorites; Nibetsu Granites; etc. | Quartz diorite; granite porphyry; granodiorite; quartz porphyry; diorite; etc. | |
| 41 | |
Ns | Neogene | Early Middle Miocene | Area along Japan Sea | Nishikurosawa Formation; Upper part of Aniai Formation; Sunakobuchi; Congenyama and Sugota Formations; etc. | Sandstone; mudstone; acid pyroclastic rock and conglomerate (with andesite-basalt pyroclastic rock) |
| 42 | |
Nr | Neogene | Early Middle Miocene | Area along Japan Sea | Nishikurosawa Formation; Upper part of Aniai Formation; Sunakobuchi; Congenyama and Sugota Formations; etc. | Rhyolite lava and dacite lava (with pyroclasstic rock; etc.) |
| 43 | |
Nb | Neogene | Early Middle Miocene | Area along Japan Sea | Nishikurosawa Formation; Upper part of Aniai Formation; Sunakobuchi; Congenyama and Sugot Formations; etc. | (Pyroxene-)olivine base\alt lava; pyroxene basalt lava and pyroclastic rock (with pyroxene andesite pyroclastic rock; mudstone; (pyroxene-)olivine dolerite; etc. |
| 44 | |
Ds | Neogene | Early Middle Miocene | Area along Japan Sea | Upper part of Daijima Formation; Middle part of Aniai Formation; Hatamura Formation; etc. | Sandstone; acid pyroclastic rock and mudstone (with andesite(-basalt)pyroclastic rock; conglomerate; etc.) |
| 45 | |
Dr2 | Neogene | Early Middle Miocene | Area along Japan Sea | Upper part of Daijima Formation; Middle part of Aniai Formation; Hatamura Formation; etc. | Rhyolite lava (with pyroclastic rock) |
| 46 | |
Dd | Neogene | Early Middle Miocene | Area along Japan Sea | Upper part of Daijima Formation; Middle part of Aniai Formation; Hatamura Formation; etc. | Biotite rhyolite welded uff; pyroxene andesite welded tuff (with tuff-tuff breccia; lava; etc.) |
| 47 | |
Dm.Dt | Neogene | Early Middle Miocene | Area along Japan Sea | Lower part of Daijima Formation; Lower part of Aniai Formation; Haginari; Iizawa and Kanotsume Formations; etc. | Sandstone; conglomerate and mudstone (Dm); acid tuff-tuff breccia; welded tuff; sandstone; conglomerate and mudstone (Dt) |
| 48 | |
Dv | Neogene | Early Middle Miocene | Area along Japan Sea | Lower part of Daijima Formation; Lower part of Aniai Formation; Haginari; Iizawa and Kanotsume Formations; etc. | (Olivine-)pyroxene andesite lava; (pyroxene-)olivine basalt lava and tuff-tutt breccia(with welded tuff; etc.) |
| 49 | |
Dr1 | Neogene | Early Middle Miocene | Area along Japan Sea | Lower part of Daijima Formation; Lower part of Aniai Formation; Haginari; Iizawa and Kanotsume Formations; etc. | Rhyolite lava |
| 50 | |
Ot | Neogene | Early Middle Miocene | Area along back-bone like range | Upper part of Oishi Formation (Kawashiri Tuff Member; etc.);Mahirugawa Formation; etc. | Acid pyroclastic rock (with andesite pyroclastic rock; mudstone; sandstone; etc.) |
| 51 | |
Or2 | Neogene | Early Middle Miocene | Area along back-bone like range | Upper part of Oishi Formation (Kawashiri Tuff Member; etc.);Mahirugawa Formation; etc. | Rhyolite lava and dacite lava (with lapilli tuff; tuff breccia; welded tuff; etc.) |
| 52 | |
Oa3 | Neogene | Early Middle Miocene | Area along back-bone like range | Upper part of Oishi Formation (Kawashiri Tuff Member; etc.);Mahirugawa Formation; etc. | Pyroxene andesite lava and pyroclastic rock |
| 53 | |
Ob | Neogene | Early Middle Miocene | Area along back-bone like range | Upper part of Oishi Formation (Kawashsiri Tuff Member; etc.);Mahirugawa Formation; etc. | (Pyroxene-olivine-)basalt lava; pyroclastic rock and (pyroxene-olivine) dolerite |
| 54 | |
Or1 | Neogene | Early Middle Miocene | Area along back-bone like range | Lower part of Oishi Formation; Obonai and Yuda Formations; etc. | Rhyolite lava |
| 55 | |
Oa2 | Neogene | Early Middle Miocene | Area along back-bone like range | Lower part of Oishi Formation; Obonai and Yuda Formations; etc. | (Olivine-)pyroxene andesite tuff-tuff breccia(with lava; acid tuff; mudstone; welded tuff; etc.) |
| 56 | |
Oa1 | Neogene | Early Middle Miocene | Area along back-bone like range | Oarasawa Formation | (Olibine-)pyroxene andesite lava and pyroclastic rock |
| 57 | |
Mr | Oligocene-Early Miocene | Area along Japan Sea | Nishioga Group; Omata and Yamauchi Formations; etc. | Rhyolite lava and pyroclastic rock | |
| 58 | |
Ma | Oligocene-Early Miocene | Area along Japan Sea | Nishioga Group; Omata and Yamauchi Formations; etc. | Ryroxene andesie lava and tuff-tuff breccia(with acid tuff; welded tuff; dacite lava; basalt lava; basalt tuff-tuff breccia; etc.) | |
| 59 | |
Md | Paleogene | Oligocene-Early Miocene | Area along Japan Sea | Nishioga Group; Omata and Yamauchi Formations; etc.,Akashima Formation | Pyroxene dacite lava; pyroxene andesite lava and pyroclastic rock |
| 60 | |
G3 | Cretaceous-Paleogene | Hornblende biotite granite | |||
| 61 | |
G2 | Cretaceous | Hornblende-biotite granodiorite; tonalite; biotite granite; etc. | |||
| 62 | |
P | Permian-early Mesozoic | Clayslate; chert and sandstone | |||
| 63 | |
G1 | Unknown age | Gneissose hornblende-biotite granodiorite (with quartz diorite; tonalite and granite) | |||
| 64 | |
mt | Unknown age | Biotite schist; amphibolite; etc. |