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List of geological units in Akita prefecture
A list of stratigraphic units, igneous bodies, and geological structures reported from Akita prefecture, Tohoku region, Honshu island, Japan.
Photographs of geological units in Akita prefecture
- Cretaceous (145.0-66.0 Ma)
- Abukuma belt
- Shirakamidake Granitic Complex
- Akashima Formation
- Nyudozaki Igneous Rocks
- Akashima Lavas
- Taiheizan Complex Pluton
-
- Tertinary granites
- Taiheizan Plutonometamorphic Rocks
-
- Taiheizan Granodiorite
- Haginari Granite
- Nakamori Gabbro
- Metamorphic rocks
- Obonai Granodiorite
- Kamuroyama Granites
- Eocene (56.0-39.0 Ma)
- Monzen Formation
- Shinzan Rhyolite
- Shiosenomisaki Sandstone and Conglomerate
- Kenashiyama Andesite
- Nagasaki Dacite
- Chorakuji Basalt
- Ryugashima Dacite
- Butaijima Basalt
- Haginari-Okuramatasawa Formation
- Oligocene-Miocene
- Yamauchi Formation
- Yamayakawa Formation
- Nishioga Group
- Miocene (23.03-5.33 Ma)
- Fujikuragawa Formation
- Kuroishizawa Formation
- Sugozaki Quartz Diorite
- Onnagawa Formation
- Shinzan Diatomaceous Mudstone Member
- Hirasawa Diatomaceous Mudstone Member
- Kamisannai Tuff Member
- Aizen Basalts
- Babame Dolerite
- Futamata Rhyolites
- Yakushiyama Basalts
- Yokoyama Dacite
- Innai Tuff Member
- Numadate Andesite
- Kabuyama Andesite
- Asahimori Rhyolite
- Tsukiyama Rhyolite
- Nishikurosawa Formation
- Daijima Formation
- Nomuragawa Formation
- Tateyamazaki Dacite
- Honzan Vent-filling Deposit
- Nomuragawa Dacite II
- Nomuragawa Basalt
- Nomuragawa Dacite I
- Nomuragawa Tuffaceous Conglomerate
- Shigenai Formation
- Kagoya Formation
- Yukizawa Formation
- Hotakizawa Formation
- Menaichizawa Formation
- Okuzu Formation
- Shijuyataki Basaltic Hyaloclastite Member
- Akamori Tuff Breccia Member
- Motoyama Volcanic Breccia Member
- Uwamukai Tuff Breccia Member
- Kitanomatasawa Formation
- Uyashinai Mudstone Member
- Shonai Tuff Member
- Suwayama Dacite
- Utto Formation
- Torisakagawa Formation
- Omata Fomration
- Sugota Formation
- Ukibuta Basalt Member
- Hachiisan Mudstone Member
- Gongenyama Formation
- Hatamura Formation
- Taikura Basalt Member
- Ogura Welded Tuff Member
- Takayakushiyama Andesite Member
- Mashikozawa Welded Tuff Member
- Shimizubuchi Tuff Member
- Zentoku Tuff Member
- Kanotsume Formation
- Oyana Formation
- Doroyu Formation
- Kobinaizawa Formation
- Fujikotogawa Formation
- Iwaya Formation
- Ittori Formation
- Subari Andesite
- Moyasan Rhyolite
- Katsurabuchi Formation
- Shiotezawa Formation
- Hachiwari Formation
- Yamaya Formation
- Hayaguchigawa Formation
- Tomarikawa Mudstone Member
- Ichinomatazawa Basalt Member
- Futatsumori Quartz Diorite
- Akaishigawa Diorite Porphyrite
- Noshirooki Andesite
- Koyanosawa Formation
- Ogata Basalt Member
- Manaitayama Volcanic Rocks
- Osarubegawa Formation
- Kirinai Formation
- Makibuchi Formation
- Koani Formation
- Moriyama Volcanics
- Houzukiyama Dacite
- Himegatake Andesite
- Omoriyama Andesite
- Kumazawagawa Formation
- Koshitomaezawa Formation
- Obonai Formation
- Kunimitoge Formation
- Aosawa Formation
- Yashiozawakawa Formation
- Zentoku Quartz Diorite
- Iizawa Formation
- Shigenosawa Andesite Member
- Kurosawa Formation
- Okawa Formation
- Kamitamatagawa Volcanic Rocks
- Momoyake Volcanic Rocks
- Koshikiyama Dacite
- Daiyama Quartz Diorites
- Ozawa Body
- Okuromoriyama Body
- Daisenyama Formation
- Sarakawa Formation
- Okachigawa Formation
- Minamizawa Welded Tuff Member
- Yunosawagawa Formation
- Oarasawa Formation
- Oidegawa Formation
- Nishikozawa Formation
- Tozan Rhyolite Member
- Miocene-Pliocene
- Torakeyama Formation
- Torakeyama Tuff Member
- Oyu Welded Tuff Member
- Minasegawa Tuff Member
- Nibetsu Granite
- Tsukushimori Rhyolite
- Yoroibata Formation
- Pliocene (5.33-2.58 Ma)
- Tentokuji Formation
- Tentokuji facies
- Alternation facies
- Katsurane facies
- Haguroyama Dacites
- Fukuyama Andesites
- Chojayashiki Dacites
- Sanzugawa Formation
- Upper Member
- Main Member
- Breccia Member
- Maeyamagawa Formation
- Usuizawa Formation
- Minamihirasawa Formation
- Minamihirasawa Tuff
- Miyata Formation
- Moriyoshi Dacite
- Pliocene-Pleistocene
- Funakawa Formation
- Upper Nanakura Tuff Member
- Lower Nanakura Tuff Member
- Yunokoshiyama Rhyolite
- Yunosawa Rhyolites
- Soyakyo Andesite
- Shinzan Andesites
- Yonegamori Dacite
- Osanai Tuff Member
- Nomura facies
- Sasaoka Formation
- Nishimizuguchi Formation
- Pleistocene (2.58- 0.01Ma)
- Shibikawa Formation
- Katanishi Formation
- Honnai Sand Member
- Matsukizawa Sand and Gravel Member
- Kakumazaki Mud Member
- Tarusawa Sand Member
- Anden Sand Member
- Kitaura Formation
- Megata volcano
- Ichinomegata maar
- Ninomegata maar
- Sannomegata maar
- I-stage volcanic product
- II-stage volcanic product
- Wakimoto Formation
- Toga volcano products
- Toga Pumic Bed
- Oga Pumice Tuff
- Iriai Formation
- Aikawa and Kotokawa Terrace Deposit
- Hakoi Formation
- Tenno Formation
- Takaoka Formation
- Nishime Formation
- Chokai volcano
- Stage II
- Stage IIc
- Hottai Lava
- Upper Akakuzurezawa Lava
- Jorozawagawa Lava
- Stage IIb
- Odaira Lava
- Torinoumi Lava
- Kawafukurogawa Pyroclastic Flow Deposit
- Inakuradake Lava
- Kannonmori Lava
- Lower Saruana Lava
- Stage IIa
- Osagawa Lava
- Kosagawa Lava
- Kawafukuroogawa Lava
- Mototaki Lava
- Kawafukuro Lavas
- Ichinosaka Lava
- Hongo Lava
- Upper Nasodani Lava
- Stage I
- Uguisugawa Basalt
- Mitake Mudflow Deposits
- Okuyama Debris Avalanche Deposits
- Shirayukigawa Debris Avalanche Deposits
- Yurihara Debris Deposits
- Ishihagegawa Volcanic Rocks
- Iigamori Lava
- Lower Akakuzurezawa Lava
-
Akakuzurezawamigimata Lava
- Shunomatagawa Lava
- Shimotamatagawa Lava
- Upper Shimotamatagawa Lava
- Mitaki Volcanic Rocks
- Nasodani Lava
- Torigoegawa Lava
- Lower Yabitsugawa Lava
- Upper Yabitsugawa Lava
- Okumiyayama Dacite
- Kabutoyama Pyroclastic Flow Deposit
- Kijiyama Pyroclastic Flow Deposit
- Takamatsudake Dacite
- Kobinaiyama Andesite
- Tatematazawa Formation
- Nenbazawa Formation
- Daira-Komagatake volcano
- Daira-Komagatake Volcanic Products
- Tashirodake volcano
- Itazawa Lahar deposit
- Hiratakizawa Lahar deposit
- Central cone
- Main body
- Older stratovolcano
- Nakazawa Formation
- Kemanai Terrace Deposit
- Low III Terrace Deposit, Noshiro
- Low II Terrace Deposit, Noshiro
- Low I Terrace Deposit, Noshiro
- Middle II Terrace Deposit, Noshiro
- High II Terrace Deposit, Noshiro
- High I Terrace Deposit, Noshiro
- Yuguruma Formation
- Ishikurayama Formation
- Upper Kanegasaki Terrace Deposit
- Lower Kanegasaki Terrace Deposit
- Kamishinzan Terrace Deposit
- Shimoshinzan Terrace Deposit
- Lower I Terrace Deposit, Kariwano
- Middle III Terrace Deposit, Kariwano
- Middle II Terrace Deposit, Kariwano
- Middle I Terrace Deposit, Kariwano
- Higher II Terrace Deposit, Kariwano
- Higher I Terrace Deposit, Kariwano
- Lower II Terrace Deposit, Yashima
- Lower I Terrace Deposit, Yashima
- Middle Terrace Deposit, Yashima
- Higher V Terrace Deposit, Yashima
- Higher IV Terrace Deposit, Yashima
- Higher III Terrace Deposit, Yashima
- Higher II Terrace Deposit, Yashima
- Higher I Terrace Deposit, Yashima
- Moriyoshi volcano
- Later stage
- Okudake Lava
- Tachigamori Lava
- Hibakuradake Lava
- Bunatai Lava
- Earlier stage
- E-3 stage
- Sudokizawa Lava Flow
- Senbonsugisawa Scoria Flow Deposit
- E-2 stage
- Ichinomatakawa Lavas
- Ichinokoshi Lavas
- Todorinaisawa Lava
- Animatsukurasawa Lavas
- Tokidozawa Lava
- E-1 stage
- Tamagawa Welded Tuff
- Kurasawayama Welded Tuff
- Bunamoribokujo Welded Tuff
- Daibutsu volcano
- Kayodake volcano
- Post-caldera lava
- Hitsumori Lava
- Parasitic cone
- Eboshidake Lava
- Pre-caldera stratovolcano
- Kowase Altered Andesite
- Shibakura volcano
- Upper Shibakura Lava
- Lower Shibakura Lava
- Bunamori Lava
- Tamagawa Welded Tuff
- Ainaizawa Formation
- Oshiromori Volcanic Products
- Nyutozan Volcanic Products
- Yumoriyama Volcanic Products
- Sasamoriyama Volcanic Products
- Shimotamatagawa Formation
- Bosawa Andesite
- Kawaiyama Dacite
- Pleistocene- Holocene
- Kanpu volcano
- Stage 4
- Tsumakoi-touge Lava
- Stage 3
- Tamanoike Landslide and Debris-avalanche Deposits
- Takikawa Lava
- Sancho Lava
- Katakura Lava
- Kotokawa Lava
- Stage 2
- Iwashimizu Lava
- Urata Lava
- Tarusawa Tephra
- Stage 1
- Iwakura Lava
- Tominaga Lava
- Shibikawa lava
- Wakimoto lava
- Yumoto Travertine
- Yakeyama volcano
- Onigajo Lava
- Tsugamori Central Cone Lava
- Kuroishimori Lava
- Fukenoyu Lava
- Shibukurozawa Lava
- Sorinotaki Lava
- Sumikawa Lava
- Akita-Komagatake volcano
- Post-caldera eruption stage
- Northern caldera
- Crater lake deposit
- Katakurazawa Lava
- Onamedake Lava
- Onamedake Pyroclastic Cone Deposit
- 4th Pyroclastic Cone Deposit
- Akakurazawa Pyroclastic Flow Deposit
- 3rd Pyroclastic Cone Deposit
- 2nd Pyroclastic Cone Deposit
- 1st Pyroclastic Cone Deposit
- Southern caldera
- Kodake Lava
- Kodake Ejecta Deposit
- Kodake Pyroclastic Cone Deposit
- 1970-71AD eruption products
- Medake Lava
- Medake Pyroclastic Cone Deposit
- Minamidake Pyroclastic Cone Deposit
- Syn-caldera formation stage
- Yanagisawa Pumice Deposit
- Obonai Pyroclastic Flow Deposit
- Koiwai Pumice Deposit
- Main strato cone stage
- Yakiyama Lava
- Oyakisuna Lava
- Iwaisawa Lava
- Upper Mizusawa Lava
- Yokonagane Lava
- Kinjuronagane Lava
- Odake Lava
- Owadasawa Lava
- Hinokinaigawa Lava
- Mizusawa Lava
- Tazawakokogen Lava
- Holocene (0.01-0 Ma)
- Hashimoto Formation
- Hachirogata Formation
- Noshiro Coastal Dune
- Younger Dune II
- Younger Humic Soil
- Younger Dune I
- Older Humic Soil
- Older Dune
- Tenno Coastal Dune
- Atoroku Formation
- Lower II Terrace Deposit, Kariwano
- Younger Sand Dune Deposits, Kisakata
- Older Sand Dune Deposits, Kisakata
- Younger Fan Deposits, Kisakata
- Older Fan Deposits, Kisakata
- Kisakata Formation
- Kotaki Formation
- Kotaki Mudflow Deposits
- Chokai volcano
- Stage III
- Stage IIIb
- Kojingatake Lava
- Kisakata Debris Avalanche Deposit
- Stage IIIa
- Shichikosan Lava
- Saruana Lava
- Koyoshigawa Debris Avalanche Deposit
- Shonai Sand Dunes
- Towada-a tuff bed
- Towada-b tuff bed
- Chuzeri tuff bed
- Geological structures
- Shiraito fault
- Shiose fault
- Minamihirasawa fault
- Yumoto fault
- Oganaka fault
- Sannotaki fault
- Shionosaki fault
- Nomura anticline
- Onnagawa anticline
- Nakamaguchi anticline
- Wakimoto anticline
- Kotokawa anticline
- Sarukawa anticline
- Futto anticline
- Kotohama anticline
- Onnagawa syncline
- Hamamaguchi syncline
- Wakimoto syncline
- Yasuda syncline
- Iriai syncline
- Unosaki dome