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List of geological units in Okayama prefecture

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

Photographs of geological units in Okayama prefecture

Paleozoic
Sangun Metamorphic Rocks
Sangun Metamorphic Rocks
Tomada Formation
Okunotaira Alternation Member
Kamiyokonookudani Clayslate Member
Karasugasen Alternation Member
Shimmei Clayslate Member
Aida Formation
Nankai Clayslate Member
Kusakabe Clayslate Member
Nigaki Group
Mikunisan Body
Mimuro Body
Takase Body
Yoshida Body
Yuno Body
Ashidachi Body
Taso Body
Uchinokusa Body
Maio Body
Yanomine Body
Mazuka Body
Yamano group
Mihara formation
Silurian-Permian
Maizuru Belt
South zone
Yakuno Complex
Basalt Shale Unit
Tonoshiki Formation
Carboniferous-Permian
Nakamura group
Koyama group
Yoshii group
Carboniferous-Jurassic
Maizuru Belt
North zone
Carboniferous (358.9-298.9 Ma)
Atetu group
Nagoe formation
Mitsudo group
Kodani formation
Hina limestone
Permian (298.9-252.17 Ma)
Atetsu group
Yukawa group
Terauchi formation
Maki formation
Kanikawa formation
Sabushi group
Shoyama formation
Iwamoto formation
Maizuru Belt
Central zone
Maizuru Group
Upper Formation
Middle Formation
Lower Formation
Bottom Formation
Yanahara Group
Kose Group
Dodo Group
Yakuno Complex
Uji formation
Fuka formation
Ultra-Tamba Belt
Kozuki Formation
Oi Formation (Ejiri formation)
Hikami Formation (Mantomi formation)
Hijima Formation
Permian-Jurassic
Tanba belt
Tanba group
Mesozoic
Nagisan Andesites
Gandoya Tuff Breccia
Tsugawagawa Conglomerate
Tenguiwa Gabbro
Donishikitoge Gabbro
Triassic (252.17-201.3 Ma)
Maizuru Belt
Central zone
Nakaiso Conglomerate Bed
Yanagi Formation
Fukumoto Group
Miyanooku Formation
Kyogakubo Formation
Kusano Formation
Kanakawa formation
Hirono Formation
Shimoyama Alternation Member
Fukui Alternation Member
Doi Coal-bearing Member
Shimouryubara Alternation Member
Kyowa formation
Nariwa Group
Hinabata Formation
Hina Formation
Mogamiyama Formation
Jito Formation
Niga Formation
Shodera formation
Jurassic (201.3-145.0 Ma)
Katsuyama shear zone (Hida marginal belt)
Yamaoku formation
Cretaceous (145.0-66.0 Ma)
Yuno Formation
Chiya Volcanic Rocks
Mikunisan Rhyolites
Takao Andesites
Kanmon Group
Hayama formation
Sora member
Eda member
Inakura formation
Hiroshima Granites
Nibori Granite
Mannari granite
Aioi Group
Ako Formation
Hatsutoji Member
Tsurukamejobu Formation
Takidani Member
Kagami Member
Tsurukamekabu Formation
Shimobata Member
Midano Formation
Tenguyama Andesite
Chizu Granite
Mochigase Granite
Kurami Granite
Renjaku Quartz Diorite
Sukeyasu Quartz Diorite
Honzanji Granodiorite
Myokenzan Granodiorite
Daito Rhyolites
Cretaceous-Paleogene
Kirinzan-Okurayama-Hanamiyama Body
Haigatawa Body
Shimokurotani Body
Chiyaihara Body
Kamikurotani Body
Chiya Body
Oino Body
Watada Body
Wakasugi-Mimuro Body
Paleogene
Maejima Formation
Tottori Granite
Sugo Body
Sasao Body
Paleogene-Neogene
Futamatayama lava
Muneage formation
Shiodaki formation
Eocene (56.0-39.0 Ma)
Hiruzen volcano
Hiruzen lava
Mizokuchi tuff breccia
Upper tephra bed
Lower tephra bed
Banda Basalt
Kushinoyama Basalt
Kitagata Formation
Eocene-Oligocene
Namigata Formation
Main part
Senjuin Shell-Sandstone Member
Onishi Conglomerate Member
Kibi Formation, Yamajari Formation
Tomiyoshi Formation
Motomura Member
Minohata Member
Kazahaya Member
Tsudaka Formation
Karako Member
Sugano Member
Nakayama Member
Takase formation
Oligocene (33.9-23.03 Ma)
Yagane Formation
Miocene (23.03-5.33 Ma)
Katsuta Group
Takakura Formation
Takata Sandstone Mudstone Member
Ozawa Sandstone Mudstone member
Yoshino Formation
Izumoto Sandstone Member
Makabe Conglomerate Member
Uetsuki Formation
Ikegahara Coal-bearing Member
Takane Coal-bearing Member
Kawasaki Conglomerate Member
First Setouchi Supergroup
Bihoku Group
Tajibe Formation
Nichioji Formation
Ukan Formation
Tsuneyama Siltstone Member
Azechi Sandstone and Conglomerate Member
Shimoyokomi Sandstone and Conglomerate Member
Yamagata Muddy Sandstone Member
Suzuoka Conglomerate Member
Fujita Formation
Nerigami Basalt
Konomine Andesite
Miocene-Pliocene
Misasa group
Pliocene (5.33-2.58 Ma)
Tando Tuff Breccia
Nakatsugo Andesites
Takashimizu Basalts
Takamatsuyama Rhyolite
Mihirayama Andesite
Ningyotoge Formation
Kuroiwa Basalt Lava
Gorinbara Basalt Lava
Happongoshi Andesite Lava
Iwabuchi Basalt Lava
Pleistocene (2.58- 0.01Ma)
Hiruzen volcano group
Kamihiruzen volcano
Kamihiruzen Lava
Nakahiruzen volcano
Nakahiruzen Lava
Shimohiruzen volcano
Upper Shimohiruzen Lava
Lower Shimohiruzen Lava
Futamatasen volcano
Futamatasen Lava
Giboshisen volcano
Giboshisen Lava
Hiruzenbara Formation
Nihonbara Formation
Highland Gravel Beds
Daisen tuff bed
Upper bed
Middle bed
Lower bed
Lowest bed
Aira-Tn tuff bed (AT, Kinako tuff bed)
Geological structures
Nichioji thrust fault
Hane thrust fault
Oga thrust fault (Oga decken)
Mimasaka thrust fault
Mori thrust fault
Hina thrust fault
Hayama decken
Senpo fault
Katsuyama shear zone
Ushimado fault zone
Goishi anticline
Iigoshi unconformity?