List of geological units in Aomori prefecture

[ Top ] [ Japanese ] [ Other prefectures ]

A list of stratigraphic units, igneous bodies, and geological structures reported from Aomori prefecture, Tohoku region, Honshu island, Japan.

Photographs of geological units in Aomori prefecture

Jurassic (201.3-145.0 Ma)

Nagahama Formation

North Kitakami Belt

Kuzumaki - Kamaishi Sub-belt: Owasawagawa Formation; Nishimatayama Formation; Mitsumenaigawa Formation; Kodomarimisaki formation

Akka - Tanohata Sub-belt: Shiriya Group; Tateishi Formation; Higashidake Formation

Pre-Miiyako sedimentary rocks

Osawagawa Formation

Cretaceous (145.0-66.0 Ma)

Abukuma belt: Shirakamidake Granitic Complex

Harachiyama formation

Kitakami mountains plutonic rocks

II Zone: Hashikami Granite

Hishikuiyama granite

Osawa granite

Nanatsudaki Granites

Higashidake granite

Fukuura granite

Shiriyazaki granite

Nishimeya Granites

Miocene (23.03-5.33 Ma)

Fudotaki Formation: Lower Nihonmatsu Tuff; Kanagigawa Member

Genpachimori Formation

Ota Pumiceous Volcaniclastic Rocks

Umanokamiyama Formation

Nyunai Formation

Nagane Formation

Fuyube Formation: Bentenjima Rhyolite Member; Shiroiwazaki Rhyolite Member

Isomatsu Formation

Gongenzaki Formation: Variegated Tuff Member; Purple Propylite Member; Purple Tuff Breccia Member

Otose Formation

Kohamadatezawa Andesite Member

Azumagawa Rhyolite Member

Kiyotakizawa Andesite Member

Fujikuragawa Formation

Kuroishizawa Formation

Tanosawa Formation

Kurosaki Formation

Odoji Formation: Juniko Tuff Member

Sasamoriyama Volcanic Rocks

Moura Andesites

Wadagawa Formation

Yotsuzawa Formation

Nishinosawa Formation

Kanegasawa Formation

Higashidaki Formation

Benkeinai Formation

Hayaguchigawa Formation: Tomarikawa Mudstone Member

Yotsuyaku formation

Suenomatsuyama formation

Kadonosawa formation

Shinden formation

Akuidake andesites

Sai formation

Yagen Formation: Ohatagawa Green Tuff Member; Kamanosawa Tuff, Sandstone and Shale Member; Yunokawa Green Tuff Member; Yunokogawa Sandstone and Mudstone Member

Yunomatagawa Formation

Yunokawa Formation

Yunokogawa Formation

Oma Formation

Kozawa Formation: Kuzuawa Member; Ginanboku Member

Hinokigawa Formation: Ushidaki facies; Takiyama facies; Otokogawa facies; Hinokigawa facies

Kinpachizawa Formation

Oritoyama Basalt

Bentenjima Rhyolite

Ikokuma Andesites: Okoppe andesites; Zaimokugawa Formation; Ogawame Agglomerate Member; Ikokuma Agglomerate Member

Wakinosawa Andesites

Tomari Formation: Tashiro facies; Hiyamizu facies

Sarugamori Formation

Horozuki Volcanic Rocks

Gamanosawa Formation

Fukaura rhyolites

Tappi Volcanic Rocks: A I; A II; A III; A IV

Soma Agglomerate Formation

Matsukitai Formation

Tochinaigawa Formation

Yuguchiyama Formation

Nuruyu Formation

Itadome Formation: Nashikizawa Tuff Member; Lower Member

Origamizawa Formation

Manzaemonyama Formation

Tsukihiyama Volcanics

Towadaginzan formation

Oide formation

Hiroto formation

Ottatezawa formation

Hayasemori formation

Tobe formation

Sunakose formation

Sugozaki Quartz Diorite

Akaishigawa Diorite Porphyrite

Miocene-Pliocene

Misogasawa Formation: Upper Nihonmatsu Tuff

Akaishi Formation

Pliocene (5.33-2.58 Ma)

Imabetsu Andesites

Mimmaya Rhyolites

Masukawagawa Andesites

Sunagosawa formation

Otakizawa Pumiceous Volcaniclastic Rocks

Taiaki Formation

Higashimeya Formation

Takano Dacite

Yunosawa caldera: Obirakiyama Pyroclastic Flow Deposit

Ikarigaseki caldera: Ajarayama Andesite; Ikarigaseki Formation; Nijikai Tuff; Mitsumori Andesite

Fujisawamori Lava

Kuromori Lava

Sorigasezawa Andesite

Kenyoshi formation

Shimizume formation

Horyo-Kita Lava

Togawa Formation

Sannohe group

Togawa formation

Tomezaki formation: Meoki member

Ohata Formation

Komena Dacite

Hantarozawa Welded Tuff

Totezawa formation

Odakamori volcanic rocks: Odakamori lava

Pliocene-Pleistocene

Narusawa Formation

Isodayama Formation

Hosono Andesite

Pleistocene (2.58- 0.01Ma)

Noheji Formation

Tanabu Formation

Tazawamoriyama Formation

Shoheizugawa Pumiceous Volcaniclastic Rocks

Takazumoriyama Scoriaceous Volcaniclastic Rocks

Hongogawa Pumiceous Volcaniclastic Rocks

Maedanome Formation: Nakasato Sandstone Member

Koganeyama Formation

Hirosakikobon Formation

Tateoka formation

Hakkoda caldera

Kita-Hakkoda volcanoes: Odake Pyroclastic Rocks; Odake Lava; Akakuradake Pyroclastic Rocks; Akakuradake Lava; Idodake Pyroclastic Rocks; Idodake Lava; Kodake Lava; Iodake Lava; Sennintai Lava and Pyroclastic Rocks; Tamoyachidake Lava; Takadaotake Lava and Pyroclastic Rocks; Hinadake Lava and Pyroclastic Rocks; Tashirotai Lacustrine Formation

Minami-Hakkoda volcanoes

Tsuta Debris Avalanche Deposit

Komagamine Pyroclastic Rocks

Komagamine Lava

Koganetai Lava

Hakkoda 2nd-stage Pyroclastic Flow Deposit: Hakkoda TE-1 Tephra

Minami-Hakkoda 3rd-stage Lava and Pyroclastic Rocks

Tsutagawa Pyroclastic Deposit

Hakkoda 1st-stage Pyroclastic Flow Deposit

Minami-Hakkoda 2nd-stage Lava and Pyroclastic Rocks

Okogawazawa Debris Flow Deposit

Osegawa Pyroclastic Flow Deposits

Minami-Hakkoda 1st-stage Lava and Pyroclastic Rocks

Hakkoda somma lava

Hakkodachuokakokyu lava

Towada caldera

Towada-Hachinohe Pyroclastic Flow Deposit

Towada-Ofudo Pyroclastic Flow Deposit

Towada-Okuse Pyroclastic Flow Deposit

Aobunayama Pyroclastic Rocks and Lava

Ohanabeyama Lava

Towada Caldera-forming Stage Tephra Group: Towada Hachinohe Fall Tephra; Towada Biscuit 2 Tephra; Towada Kirida Tephra; Towada Godo Tephra; Towada Kibidango Tephra; Towada Red Pumice Tephra

Okiura caldera

Aoni Tuff: Nurukawa Debris Flow Deposit Member; Anamizuzawa Basalt; Anamizuzawa Lithic Tuff

Okiura Dacite

Oguni Lacustrine Deposit

Rokumantai Formation

Inaritai Lacustrine Deposit

Kuroishi Fan Deposit

Owani Lacustrine Deposit

Oirasegawa Pyroclastic Rock

Nenokuchi Lacustrine Formation

Takamoriyama Formation

Hakkoda Taktoge Pyroclastic Flow Deposit

Urushihata Terrace Deposit

Shichinohe Terrace Deposit

Towada Terrace Deposit

Koiwaki volcano

Gankisan lava

Takadate Tephra Group: Towada T-22 Tephra; Towada SP Tephra; Towada Okoshi 2 Tephra; Towada T-17 Tephra; Towada Aosuji Tephra; Towada T-15 Tephra; Towada Kasutera Tephra; Towada Sc1 Tephra; Toya Pyroclastic Flow Deposit; Towada Zarame 2 Tephra; Towada Zarame 1 Tephra

Tengutai Tephra Group: Towada T-6 Tephra; Towada T-5 Tephra; Towada T-4 Tephra; Towada T-3 Tephra; Towada Nukamiso Tephra; Hakkoda Shirobeta Tephra

Old Tephra Group: Hakkoda TE-1 Tephra; Kiyose 1 Tephra; Kiyose 2 Tephra; Kiyose 3 Tephra; Kiyose 4 Tephra; Jizodaira Tephra; Kiyose 5 Tephra; Kiyose 6 Tephra; Kiyose 7 Tephra; Kiyose 8 Tephra; Kiyose 9 Tephra; Kiyose 10 Tephra; Kiyose 11 Tephra; Kiyose 12 Tephra; Kiyose 13 Tephra; Kiyose 14 Tephra

Tenmadate pumice bed

Hiuchidake volcano: Lower Hiuchidake Lava; Okawajiri Lava; Sugenoshiri Tuff Breccia

Hamana Formation

Nodai Formation

Ohodake Andesites

Pleistocene-Holocene

Hiuchidake volcano: Kuromoriyama Lava; Upper Hiuchidake Lava

Osorezan volcano: Chuokakokyu lava; Maruyama lava; Otsukushiyama lava; Shojiyama lava; Kamabuseyama lava; Tsurugiyama Lava; Tsurugiyama Agglomerate; Shozugawa Tuff Breccia

Asahinadake volcano: Asahinadake Lava

Iwakisan volcano: Iwakisan Volcaniclastic Rocks; Central cone; Parasitic cone; Younger stratovolcano; Older stratovolcano; Somma lava

Akakurazawa Mudflow Deposit

Yamadano Formation

Holocene (10-0 ka)

Towada caldera

Towada-Kemanai Pyroclastic Flow Deposit

Towada-a Tephra

Towada-b Tephra

Towada Post-caldera Stage Tephra Group

Towada-Chuseri Pyroclastic Fall Deposit: Utarube Tuff; Kanagasawa Pumice Fall Deposit; Chuseri Pumice Fall Deposit

Towada D' Tephra

Towada Nanbu Tephra: Kaimori volcanic ash; Nanbu pumice

Towada Ninokura Tephra Group

Shimokirida Terrace Deposit

Akedo Terrace Deposit

Dekijima formation

Aira-Tn tuff bed (AT)

Hk-J1 Tephra

Hk-J2 Tephra

Hk-J3 Tephra

Baitoushan-Tomakomai Tephra

Age unknown

Goshikiiwa tuff bed

Kamikitachubu tuff bed

Kamikitajobu tuff bed

Tsurugaoka formation

Shibamoriyama volcanic rocks

Rokkakuzawa tuff bed

Hisada formation

Kuzukawa formation

Owasawa formation

Pre-Hakkoda pumice flow deposit

Geological structures

Tsugaru fault

Nyunai fault

Shimokita fault

Noheji fault

Omagoshi fault

Asaseishi fault

Otose anticline

Oma anticline

Ajigasawa anticline

Kodomari syncline

Yotsutaki dome

Hakamagoshi dome

Umagami dome

Tairadate dome

Wadagawa dome

Nakuidake dome