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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
Yamano group
Mihara formation
Silurian-Permian
Maizuru Belt
South zone
Yakuno Ophiolite
Tonoshiki Formation
Carboniferous-Permian
Sangun metamorphic rocks
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
Yakuno Ophiolite
Uji formation
Fuka formation
Ultra-Tamba Belt
UT-3 Sub-belt
Kozuki Formation
UT-2 Sub-belt
Oi Formation (Ejiri formation)
UT-1 Sub-belt
Hikami Formation (Mantomi formation)
Permian-Jurassic
Tanba belt
Tanba group
Mesozoic
Yanahara group
Triassic (252.17-201.3 Ma)
Maizuru Belt
Central zone
Yanagi Formation
Fukumoto Group
Miyanooku Formation
Kyogakubo Formation
Kusano Formation
Kanakawa formation
Nakaiso formation
Kyowa formation
Hirono 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)
Kanmon group (Kenseki formation)
Hayama formation
Sora member
Eda member
Inakura formation
Odo rhyolite
Takanomine andesite
Hiroshima granite
Mannari granite
Paleogene
Maejima Formation
Paleogene-Neogene
Futamatayama lava
Fujita formation
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
Yoshino Formation
Uetsuki formation
First Setouchi Supergroup
Bihoku Group
Tajibe Formation
Nichiôji Formation
Ukan Formation
Tsuneyama Siltstone Member
Azechi Sandstone and Conglomerate Member
Shimoyokomi Sandstone and Conglomerate Member
Yamagata Muddy Sandstone Member
Suzuoka Conglomerate Member
Miocene-Pliocene
Misasa group
Pleistocene (2.58- 0.01Ma)
Hiruzenbara formation
Daisen tuff bed
Upper bed
Middle bed
Lower bed
Lowest bed
Nihonbara formation
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?