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List of geological units in Ibaraki prefecture

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

Photographs of geological units in Ibaraki prefecture

Paleozoic
Takanuki metamorphic rocks
Kasama group
Tsukuba metamorphic rocks
Cambrian (541.0-485.4 Ma)
Hitachi Metamorphic Rocks
Hitachi Volcanoplutonic Complex
Akazawa Formation
Tamadare Formation
Carboniferous (358.9-298.9 Ma)
Hitachi Metamorphic Rocks
Daioin Formation
Omika Formation
Permian (298.9-252.17 Ma)
Hitachi Metamorphic Rocks
Ayukawa Formation
Triassic-Jurassic
Yamizo group
Karasuyama formation
Torinokoyama formation
Yamizosan formation
Keisokusan formation
Isehata formation
Kunimisan formation?
Takatori formation
Keisoku group
Jurassic (201.3-145.0 Ma)
Sarukubo formation
Ashio Belt
Takatori Unit
Kunimiyama Unit
Kasama Unit
Jurassic-Cretaceous
Wagakunisan Metamorphic Rocks
Tsukuba Metamorphic Rocks
Cretaceous (145.0-66.0 Ma)
Naka group
Nakaminato formation
Isoai member
Hiraiso member (Hiraisomachi member)
Chikuko member
Oarai formation
Gozaisho metamorphic rocks
Hitachi Metamorphic Rocks
Nishidohira Formation
Takizawa Formation
Kanayama volcanic rocks
Irishiken Granodiorites
Tsukuba Gabbroic Body
Tsukuba mass
Dorokujin mass
Paleocene (66.0-56.0 Ma)
Tsukuba Granite
Kabasan Granite
Inada Granite
Eocene (56.0-39.0 Ma)
Shiramizu Group
Iwaki Formation
Oligocene (39.0-23.03 Ma)
Shiramizu Group
Shirasaka Formation
Asagai Formation
Miocene (23.03-5.33 Ma)
Taga Group
Otsu channel
Ot3 Unit
Ot2 Unit
Ot1 Unit
Hirakata channel
Hr5 Unit
Hr4 Unit
Hr3 Unit
Hr2 Unit
Hr1 Unit
Namekawa Formation
Ayukawa Formation
Isozaki Formation
Yunagaya Group
Kamenoo Formation
Mizunoya Formation
Goyasu Formation
Taki formation
Shirado Group
Takaku Group
Kokozura Formation
Kazekinokusa Formation
Yuridaira Formation
Uchiono Formation
Nishizome Formation
Kurosawa group
Konamase Formation
Somewada formation
Nawashiroda Formation
Nantaisan Volcanic Breccia (Nantaisan formation)
Asakawa group
Takikura formation
Asakawa Formation
Nakazawa member
Oenchi member
Kanazawa formation
Tochibara Rhyolites
Kitatage Formation
Osawaguchi Tuff Member
Nakatsuhara Volcanic Breccia
Nabeashiyama formation
Nishinouchi formation
Nishinouchi member
Tashiro formation
Nanatsugane formation?
Seki formation
Shionokusa formation
Okado formation
Zuiryu formation
Genjigawa formation
Honai formation
Kuniosa formation
Sakuramoto formation
Tamagawa formation
Sakachi formation
Araya formation
Urizura formation
Katsumizawa formation
Ishizuka formation
Nemoto formation
Nakanishi formation
Iitomi formation
Mito formation
Tonoyama formation
Higashikanasayama formation
Hase Formation
Kawarago Formation
Miocene-Pliocene
Hitachi Group
Kume Formation
Sukegawa Formation
Pliocene (5.33-2.58 Ma)
Hitachi Group
Hanareyama formation
Hitachi formation
Hatsuzaki group
Ajigaura formation
Hetano tuff bed
Pleistocene (2.58- 0.01Ma)
Shimosa Group
Joso Formation
Ryugasaki Formation
Kioroshi Formation (Miwa Formation, Upper Narita Formation)
Namegata Member
Kenjaku Member (upper Kamiiwahashi Formation)
Yokota Formation
Kiyokawa Formation (lower Kamiiwahashi Formation, Lower Narita Formation)
Kamiizumi Formation
Yabu Formation (Ishizaki Formation)
Uwaichi formation
Kanto loam formation
Tachikawa loam formation
Musashino loam formation
Ibaraki formation
Kanuma pumice bed (Akagi-Kanuma tephra, Ag-KP)
Takaragi loam bed
Tabaru loam bed
Itahana pumice bed (YP)
Hassaki pumice bed (HP)
Shichihonzakura pumice bed (SP)
Tokyo pumice bed
Hokota formation
Teno formation
Sakuragawa Terrace Deposit
Investigation in progress
Tabito granite
Kamishiro granite
Geological structures
Tanakura fault (Tanagura fault, Tanakura fracture zone)
Asabo fault