[ Top ] [ Japanese ] [ Other prefectures ]

List of geological units in Yamaguchi prefecture

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

Photographs of geological units in Yamaguchi prefecture

Paleozoic
Miyano formation
Iigatake formation
Devonian (419.2-358.9 Ma)
Nagato tectonic zone
Carboniferous-Permian
Akiyoshi Belt
Akiyoshi Limestone
Zuiko Limestone
Handa formation
Zomeki formation
Ota Group
Permian (298.9-252.17 Ma)
Sangun metamorphic rocks
Tsuno group
Akiyoshi Belt
Tsunemori Formation
Beppu formation
Ganpi formation
Nishiki Group
Miyano Formation
Mugitani formation
Abugawa group
Ikadaba formation
Kyodoko formation
Mikawa group
Toyohigashi Group
Dai group
Miyano group
Triassic (252.17-201.3 Ma)
Mine Group
Asou Formation
Momonoki Formation
Mugikawa formation
Fjiyakochi formation
Hirabara Formation
Kamoshiro Formation
Yamanoi Formation
Nakatsuka Formation
Idekami Formation
Hiramatsu Formation
Takiguchi formation
Atsu Group
Atsu Group
Kumakura Formation
Hongo Formation
Triassic-Jurassic
Sangun Metamorphic Belt
Suo Belt
Jurassic (201.3-145.0 Ma)
Tamba Belt
Kuga Group
Unit III
Unit II
Unit I
Mukaihata formation
Toyora Group
Ohchi Formation
Oc Unit
Ob Unit
Oa Unit
Utano Formation
Nishinakayama Formation
Higashinagano Formation
Kanoashi group
Jurassic-Cretaceous
Toyonishi Group
Yoshimo Formation
Kiyosue Formation
Cretaceous (145.0-66.0 Ma)
Kanmon Group (Kenseki group)
Shimonoseki Subgroup
Fukue Formation
Sujigahama Formation
Kitahikoshima Formation
Shiohama Formation
Wakino Subgroup
Upper Wakamiya Formation
Lower Wakamiya Formation
Upper formation
Middle formation
Lower formation
Sanin Belt
Mochigase stage volcanic rocks
Abu Group
Shiratakiyama Formation
Tenjogatake Andesite Member
Futanoigawa Rhyolite Tuff Member
Nagato Formation
Kumanodake Rhyolite Tuff Member
Daibogawa Rhyolite Tuff Member
Hohoku Formation
Asogawa Shale and Tuff Member
Otoyama Tuff Member
Awano Conglomerate and Sandstone Member
Ato Formation
Tokusagamine Sandstone-Mudstone Member
Kane Welded Tuff Member
Ikumo Formation
Caldera-collapse breccia
Mugitanigawa Welded Tuff Member
Abugawa Sandstone-Mudstone Member
Yunose Welded Tuff Member
Efunegawa Sandstone-Mudstone Member
Teijogadake Welded Tuff Member
Nakanotoro Sandstone-Mudstone Member
Togoroeki Welded Tuff Member
Sasanami Formation
Kitakoma Welded Tuff Member
Mitsuke Silt Member
Somakidani Welded Tuff Member
Kumanodake formation
Shinome formation
Maidani formation
Yofune formation
Fukuga formation
Kiyodani formation
Tatokoyama Formation (Tatokoyama Volcanic Rocks)
Ikumo caldera
Ikumo Formation
Okukano Felsic Intrusive Rocks
Usutaniyama Rhyolitic Lava
Intrusive pyroclastic rock
Sasanami caldera
Sasanami Formation
Komatsugatani Dacite Lava
Kobukidao Felsic Intrusive Rock
Rhyolite lava
Shunan Group
Zenjojiyama Formation
Taikazan Member
Hirano Member
Zenjojiyama Member
Kibe Member
Monomidake Formation
Hiratani Intrusive Breccia
Kidoyama Welded Tuff Member
Sugigatao Andesite Member
Tsuesaka Felsic Rock
Kibe Caldera
Amago Intrusive Rocks
Zenjojiyama Formation
Sakurayama Intrusive Breccia
Shiinokibata Breccia Member
Inugasako Breccia Member
Shiroyama Rhyolitic Pyroclastic Rock Member
Rhyodacitic lapilli tuff
Rhyodacitic welded tuff
Rhyolitic lapilli tuff
Rhyolitic tuff
Ushiroyama Andesite Member
Kurogoro Plutonic Rocks
Kibe plutonic rocks
Yamaguchi Caldera
Younger ring dyke
Older ring dyke
Izuruha Acidic Rocks
Katsuragadake Granite Porphyry
Zenjojiyama Formation
Hirano body
Shikuma Plutonic Complex
Sanyo Belt
Hiroshima Granites
Shimokubara Granite
Iwakuni Granite
Chofu Granite
Iwagoyama Granite
Ube-Kibe Granite
Hofu Granite
Niho Plutonic Complex
Sekidogadake Granophyre
Hikimi Group
Ryoke Metamorphic Rocks
Older Ryoke Granitoids
Gamano Granodiorite
Obatake Granodiorite
Younger Ryoke Granitoids
Kibe Granite
Namera Granite
Soo Granodiorite
Himurodake Quartz Diorite
Hobenyama granodiorites
Paleogene
Hioki Group
Eocene (56.0-39.0 Ma)
Ube Group
Kotogawa Conglomerate Formation
Upper member
Middle member
Lower member
Ube Coal-bearing Formation
Upper member
Oha formation
Middle member
Itsudan formation
Lower member
Hitoeishi formation
Futaeishi formation
Tsuchiishi formation
Futadan formation
Sanjaku formation
Kiwa formation
Eocene-Oligocene
Tamagawa group
Oligocene (39.0-23.03 Ma)
Tamagawa group
Miocene (23.03-5.33 Ma)
Ashiya group
Waita formation
Sakamizu formation
Yamaga formation
Hatabu formation
Hioki Group
Hitomaru formation
Taoyama formation
Kiwado formation
Hiju member
Arata member
Juraku formation
Yuyawan Group
Kadoyama formation
Kawajiri formation
Susa group
Upper Koyama formation
Koyama formation
Lower Koyama formation
Maeji formation
Hirashima formation
Koyama gabbro
Setouchi group (Setouchi volcanic rocks)
Pliocene-Pleistocene
Sanin volcanic rocks
Pleistocene (2.58- 0.01Ma)
Ube tuff bed
Jifuku formation
Tokusa formation
Kusae formation
Oji formation
Kichinan formation
Uji formation
Kurosaki clay formation
Kurosaki conglomerate formation
Ube clay formation
Ube conglomerate formation
Hirahara formation
Tomito formation
Ayarakigawa formation
Kamino formation
Isa formation
Sanin basalts
Kanmuriyama volcanic rocks
Daisen-Yoshinoyama volcanic rocks
Oyama formation
Pleistocene-Holocene
Hagi formation
Holocene (0.01-0 Ma)
Sand dune deposit
Yasuoka formation
Yotsutsuji formation
Higashikiwa formation
Kokuga formation
Yoshimohama sand dune deposit
Investigation in progress
Sazare formation
Hirawarabi formation
Dainoki plutonic rocks
Mitsugatake rhyolite
Otsuji formation
Towa granodiorite
Kitsunejima formation
Omi formation
Upper most formation
Upper formation
Middle formation
Lowest formation
Nosakayama volcanoes
Geological structures
Fushinogawa tectonic line
Kitayama thrust fault
Igami-Tawarayama fault
Nihodani fault
Sabadani fault
Kikukawa fault
Ogata-Oze fault
Iwakuni fault
Amagiyama fault
Obata fault
Nagano fault
Kumage fault
Oharako fault
Iwanami fault
Kurokawa fault
Shibuki fault
Fukatani fault
Mukatao fault
Juraku-Kaigawa fault