• O1, Omatsuzawa Formation
  • O1, Toyama pref.
  • O1, Ishikawa pref.
  • O1, Chiba pref.
  • O2, Miyagi pref.
  • O2, Toyama pref.
  • O2, Chiba pref.
  • O3, Chiba pref.
  • O3, Ishikawa pref.
  • O4
  • O4.5
  • O5
  • O6, Miyagi pref.
  • O6, Chiba pref.
  • O7
  • O8, Miyagi pref.
  • O8, Chiba pref.
  • O10
  • O11
  • O12
  • O13
  • O14
  • O15
  • O16
  • O18
  • O18L
  • O19
  • O21
  • O22
  • O24
  • O26
  • O27
  • O28
  • O29
  • O30
  • O31
  • OA
  • Oamamiyama Group
  • Oamamiyama Volcanics
  • Oana, Miyakejima volcano
  • Oana Unit
  • Oanayama Conglomerate Member
  • Oanayama Member
  • Oanayama Sandstone and Conglomerate Member
  • Oarai Formation
  • Oarasawa Formation
  • Oashi Formation
  • Oa Unit
  • OB
  • Ob1
  • Ob2
  • Ob4a
  • Ob4b-1
  • Ob4b-6
  • Ob4c
  • Ob5.6
  • Ob5.7
  • Ob5a
  • Ob5aU3
  • Ob5c
  • Ob6a
  • Obadaingawa Complex
  • Obadaingawa Formation
  • Oba Gravel
  • Obama Formation
  • Obamine Group
  • Obanashi Complex
  • Obaradai Loam
  • Obaradai Pumice
  • Obaradai Sand and Gravel Formation
  • Obaradai Terrace Deposit
  • Obara Granite
  • Obara Tonalite
  • Obasute Mudflow Deposit
  • Obata Formation
  • Obatake Formation
  • Obatake Granodiorite
  • Obatani Formation
  • Obayashi Formation
  • Obg
  • Obiki Unit
  • Obirakiyama Pyroclastic Rocks
  • Obirakiyama Rhyolite Member
  • Obirakiyama Tuff
  • Obisagawa Member
  • Oboke nappe
  • Oboke Unit
  • Oboke Unit, after Aoki, 2019
  • Obonai Body
  • Obonai Formation
  • Obonai Granodiorite
  • Obonai Pluton
  • Obonai Pyroclastic Flow Deposit
  • Oboradani Formation
  • Obora Formation
  • Obora Pumice Flow Deposit
  • Obp
  • Obr-Bnd1
  • Obukadake Lava
  • Obukadake volcano
  • Obuke Tephra
  • Ob Unit
  • Obusuma Group
  • Occhizawa Formation
  • Ocg
  • Ochiai Conglomerate Formation
  • Ochiai Formation, Iwate pref.
  • Ochiai Formation, Kanagawa pref.
  • Ochiaigawa Shell Bed
  • Ochiai Granite
  • Ochiai Granodiorite
  • Ochiai Lake Deposit
  • Ochiai Sandstone Conglomerate Member
  • Ochiai Sandstone Facies
  • Ochi Formation
  • Ochigawa Formation
  • Ochi Group
  • Ochii Gravel Bed
  • Oc Unit
  • Od
  • OD
  • Oda
  • Oda Andesite Member
  • Oda Formation
  • Odagoe Formation
  • Odai caldera
  • Odaino Pyroclastic Flow Deposit
  • Odaira Formation, Iwate pref., Carboniferous
  • Odaira Formation, Iwate pref., Pliocene
  • Odaira Formation, Yamagata pref.
  • Odaira Group
  • Odairakita Lava
  • Odaira Lava
  • Odaira Pyroclastic Flow Deposit
  • Odaira Welded Tuff
  • Odakakogen Sandstone Member
  • Odake 1st-stage Lava
  • Odake 2nd-stage Lava
  • Odake 3rd-stage Lava
  • Odakegawa Lavas
  • Odake Lava, Hakkoda volcano
  • Odake Lava, Akita-Komagatake volcano
  • Odake Lava, Yatsugatake volcano
  • Odake Member
  • Odake Pyroclastic Cone
  • Odake Pyroclastic Rocks
  • Odake Sheet
  • Odamaki Formation
  • Oda Mélange
  • Odana Conglomerate
  • Odana Lava
  • Odana Pyroclastic Flow Deposit
  • Odana volcano
  • Odani Body
  • Oda Pyroclastic Flow Deposit
  • Odogamori Dacite
  • Odoji Formation
  • Odokorogawa Formation
  • Odoriba Formation
  • Odorigawa Formation, Metamorphic rock
  • Odorigawa Formation, Rhyolite
  • Odorigawa Rhyolites
  • Odori Pyroclastic Flow Deposit
  • Odori Tephra
  • Odose Formation
  • Odoshimazawa Pyroclastic Flow Deposit
  • Odp
  • Oe Group
  • Oeyama Mass
  • Oeyama Ophiolite
  • OFN1
  • OFN2
  • OFN3
  • Ofuchi Formation
  • Ofudo ignimbrite
  • Ofudo Pumice Tuff
  • Ofuji Lava
  • Ofuku Member
  • Ofuna Formation
  • Ofuna Mudstone Formation
  • Ofunato Group
  • Ofunato Subbelt
  • Og-3
  • Oga
  • Ogahana Lava
  • Ogamata Formation
  • Ogamata Unit
  • Ogamo Granite
  • Ogamo Rhyolite
  • Ogane Formation
  • Ogane Mudstone
  • Oganomachi Formation
  • Oganomachi Group
  • Ogano Terrace Deposit
  • Oga pmt
  • Oga Porphyrite
  • Oga Pumice Tuff
  • Ogarasu type
  • Ogasa Group
  • Ogasayama Gravel
  • Ogata Basalt Member
  • Ogato Lava
  • Ogawa Andesite
  • Ogawa Formation, Togakushi, Nagano pref.
  • Ogawa Formation, Iiyama, Nagano pref.
  • Ogawamachi Group
  • Ogawame Agglomerate Member
  • Ogawa Tephra
  • Ogawa Tuff
  • Ogawauchi Tuffaceous Sandstone Member
  • Ogawazawa Formation
  • Ogaya Formation, Niigata pref.
  • Ogaya Formation, Gifu pref.
  • Ogayu Body
  • Ogigakura Tuff
  • Ogikubo Formation
  • Ogikubo Sandy Mudstone Member
  • Ogikubo Tuff
  • Ogino Formation
  • Oginohama Formation
  • Oginohama Group
  • Oginosen Volcanic Rocks
  • Ogi Quartz Diorite
  • Ogitazawa Andesite
  • Ogochi Group
  • Ogo Formation
  • Ogo Pumice Flow Deposit
  • Ogoto Clays Member
  • Ogoto-Ogi
  • Ogoto Sands Member
  • Ogp-b
  • Oguchigawa-Kumanogawa Plutonic Rock
  • Ogume Sandstone Member
  • Oguni Andesite
  • Oguni Formation, Yamagata pref.
  • Oguni Formation, Niigata pref.
  • Oguni Lacustrine Formation
  • Oguninuma caldera
  • Oguradani Clayslate Member
  • Oguradani Formation
  • Oguradani Granite
  • Ogura Formation
  • Ogura Welded Tuff Member
  • Ogurayama Group
  • Ogurogawa Formation
  • Ogusuyama Tephra
  • Ogy
  • Oh1
  • Oh2
  • Oh3
  • Oh3-1
  • Oh3-2
  • Oh4
  • Oh5
  • Oh6
  • Oh7
  • Oh1
  • Oh1
  • Oh1
  • Oh1
  • Oh1
  • Oh1
  • Oh1
  • Oh1
  • Oh16A
  • Oh16B
  • Oh17
  • Oh18
  • Oh9
  • Ohachidaira Caldera Eruption Deposit
  • Ohachimori Amphibolites
  • Ohagi Gravel Bed
  • Ohama Formation
  • Ohama volcano
  • Ohami Terrace Deposit
  • Ohanabeyama Lava
  • Ohanayama Andesites
  • Ohara Complex
  • Oharadani Welded Tuff
  • Ohara Formation, Chiba pref.
  • Ohara Formation, Wakayama pref.
  • Ohara Formation, Okayama pref.
  • Oharakokushoku Lava
  • Ohara Lava
  • Ohara Lava I
  • Ohara Lava II
  • Oharano Formation
  • Ohara Pyroclastic Flow Deposit
  • Ohara Pyroclastic Flow Deposit I
  • Ohara Pyroclastic Flow Deposit II
  • O'hara Tonalite
  • Ohashi Formation
  • Ohata Formation
  • Ohatagawa Green Tuff Member
  • Ohatayama Lavas
  • Ohatayama Pyroclastic Rocks
  • Ohayama Formation
  • Ohchi Formation
  • Ohbandai volcano
  • Ohgi Body
  • Ohgi Granodiorite
  • Ohgi Tonalite
  • Ohibara-type Granites
  • Ohira I Tephra
  • Ohira II Tephra
  • Ohira Formation
  • Ohirayama Formation
  • Ohirayama Unit
  • Ohirota Tuffaceous Mudstone
  • Ohisagawa Granodiorite
  • Ohisawa Formation
  • Ohito Andesites
  • Ohno Formation
  • Ohno Volcanic Rocks
  • Ohodake Andesites
  • Ohodake Formation
  • Ohori Formation
  • Ohorigawa Terrace Deposits
  • Ohta Mass
  • Ohtaniike Formation
  • Ohta Tephra
  • Ohyamashimo Formation
  • Ohzone Formation
  • Oidani Formation
  • Oidawara Formation
  • Oidegawa Formation
  • Oido Formation
  • Oido Sandstone Member
  • Oido Tuffaceous Sandstone Member
  • Oi Formation, Fukui pref.
  • Oi Formation, Chiba pref.
  • Oi Formation, Mie pref.
  • Oigatani Chert-Limestone
  • Oigawa Group
  • Oigawa Sheet
  • Oinokura Lava
  • Oinosaka Complex
  • Oirase Dacite
  • Oirase Formation
  • Oirasegawa Pyroclastic Rocks
  • Oirase scoria cone
  • Oiri Lava
  • Oiriyama Lava
  • Oiriyamasancho Lava
  • Oirizawa Lava
  • Oishi Dacite Member
  • Oishi Formation, Iwate pref.
  • Oishi Formation, Gifu pref.
  • Oishi Formation, Wakayama pref.
  • Oishigawa Formation
  • Oishigawa-futamata Lavas
  • Oishigawa Lavas
  • Oishigawa Pyroclastic Flow
  • Oishigawa Scoria
  • Oishigawa Volcanic Rocks
  • Oishikawa Sandstone Member
  • Oishi Lava
  • Oiso volcano
  • Oitsukkkui Formation
  • Oitsurushiyama Granite
  • Oiwa Formation
  • Oiwake Formation
  • Oiwake Pyroclastic Flow Deposit
  • Oiwa Lapilli Tuff Member
  • Oiwa Tuff
  • Oiwa Tuff Member
  • Oizumi Formation
  • Oji Formation
  • Ojigahata Formation
  • Ojigokudani Tuff 1
  • Ojigokudani Tuff 2
  • Ojika Group
  • Ojika Mass
  • Ojika Tuff Breccia
  • Ojima Conglomerate and Sandstone Formation
  • Ojima Formation, Miyagi pref.
  • Ojima Formation, Kagoshima pref.
  • Ojirakawa Formation
  • Ojirogawa Body
  • Ojirogawa Mudflow Deposit
  • Ojiroyama Lava
  • Ojiya Terrace Deposit
  • Ojo Formation
  • Ojoin Formation
  • Ojoji Tuff Bed
  • Ojo Tuff Breccia
  • Ok
  • OK I
  • Ok1
  • OK II
  • OK-2, Niigata pref.
  • Ok2, Kanagawa pref.
  • OK III
  • Ok3
  • Ok4
  • OK-5
  • Okabe Tuffaceous Sandstone
  • Okaburi Formation
  • Okachigawa Formation
  • Okadashimo Formation
  • Okada Tephra
  • Okago Formation
  • Okago Tuff
  • Okamachi Formation
  • Okama Lava
  • Okamotsugawa Complex
  • Okamura Formation
  • Okamuri Formation
  • Okanaka Tuff
  • Okanaro Group
  • Okata volcano
  • Okata Basalts
  • Okawa Formation
  • Okawajiri Lava
  • Okawara Alternation Member
  • Okawaratoge Pyroclastics
  • Okaya Gravels Member
  • Okayatani Granodiorite Porphyry
  • Okayazawa Mass
  • Okazaki Formation
  • Okazaki Group
  • O-kb1
  • O-kb2
  • Okemi Tephra
  • Okenuma Unit
  • Okiagedaira Lavas
  • Oki Gneisses
  • Oki Metamorphic Rocks
  • Okimura Formation
  • Okinajima Debris Avalanche Deposit
  • Okinajima mud flow deposit
  • Okinajima volcanic mudflow deposit
  • Okinazawa Basalt Member
  • Okine Member
  • Okinoshima Body
  • Okinoshima Sandy Siltstone Member
  • Okinoshima Welded Tuff
  • Okirai Granodiorite
  • Oki Tephra, Mie pref.
  • Oki Tephra, Shimane pref.
  • Okitsu Mélange
  • Okiura Basalt Member
  • Okiura caldera
  • Okiura Dacite
  • Okkai Tephra
  • Okkoto Lava
  • Okogawazawa Debris Flow Deposit
  • Okogawazawa Formation
  • Okogawazawa Lavas
  • Okozuritani Granodiorite Porphyry
  • Oksco
  • Okubo I Tephra
  • Okubo II Tephra
  • Okubo Body
  • Okubo Formation, Fukushima pref.
  • Okubo Formation, Nagano pref.
  • Okubo Lava
  • Okubo mass
  • Okubo Mudstone and Sandstone Member
  • Okubo Mudstone Member
  • Okuboyama type
  • Okuda Formation
  • Okudake Lava
  • Okuda Member
  • Okudani Formation
  • Okuda Shell Bed
  • Okuda Tuff Bed
  • Okueyama caldera
  • Okueyama Volcanic Complex
  • Okueyama Volcano-plutonic Complex
  • Oku Formation
  • Okugano Body
  • Okugawachi Unit
  • Okuhara Formation
  • Okuhida Pyroclastic Flow Deposit
  • Okuhinotsuchi Formation
  • Okui Formation
  • Okukano Felsic Intrusive Rocks
  • Okukawanami Formation
  • Okukinu caldera
  • Oku-kita Basalt
  • Okukito Lava
  • Oku-kurobe Granite
  • Okumarusawa Granite
  • Okumatashiro Granite
  • Okumayama Granite
  • Okumayama Granodiorite
  • Okumine Body
  • Okuminezawa Gravel Bed
  • Okumino Acid Igneous Complex
  • Okumiyayama Dacite
  • Okumizuma Tuffaceous Sandstone
  • Okumyogata Formation
  • Oku-Niikappu Body
  • Okuniikappu Complex
  • Okunikko Rhyolites
  • Okunoin volcano
  • Okunosawa Formation
  • Okunugi Formation
  • Okura Andesite Member
  • Okura Formation, Niigata pref.
  • Okura Formation, Nagano pref.
  • Okuramata Formation
  • Okura Pyroclastic Flow Deposits/li>
  • Okurayama Quartz Diorite
  • Okuro Lava
  • Okuromoriyama Body
  • Okusakainosawa Sandstone and Mudstone Member
  • Okusayama Mass
  • Okuse ignimbrite
  • Okuse Pyroclastic Flow Deposit
  • Okushibetsu Plutonic Complex
  • Okushiga Lake Deposit
  • Okushimayama Welded Tuff
  • Okusoechi Lava
  • Okusoechi Pyroclastic Flow Deposit
  • Okutadami Green Tuff Formation
  • Okutamadani Complex
  • Okuteineyama Lava
  • Okutone Granite
  • Okutone Group
  • Okuwabara Formation
  • Okuwa Debris Avalanche Deposit
  • Okuwa Formation
  • Okuwa Sandstone Member
  • Okuwahara Sandstone Member
  • Okuwa Mudflow Deposit
  • Okuyamada Formation
  • Okuyama Debris Avalanche Deposits
  • Okuyama Formation
  • Okuyama Member, Yamanashi pref.
  • Okuyama Member, Toyama pref.
  • Okuyama Pyroclastic Flow Deposit
  • Okuzu Formation
  • Okuzumi Formation
  • Okuzure Conglomerate
  • Okuzure Formation, Chiba pref.
  • Okuzure Formation, Shizuoka pref.
  • Okuzure Group
  • Old dune, Shonai sand dunes
  • Older Akakuradake Debris Avalanche Deposit
  • Older Atosanupuri Volcano
  • Older Debris Avalanche Deposits, Tateyama volcano
  • Older Debris Flow Deposit
  • Older Dorokoro Member
  • Older Dune
  • Older edifice, Oshima volcano
  • Older Fan Deposits, Akita pref.
  • Older Fan Deposit, Nagano pref.
  • Older Fan Deposits, Aichi pref.
  • Older Fan Deposits, Izumo, Shimane pref.
  • Older Fan Deposits, Taki, Shimane pref.
  • Older Haruna Volcanic Dykes
  • Older Haruna Volcanic Fan Deposits
  • Older Haruna Volcanic Products
  • Older Haruna volcano
  • Older Higher Terrace Deposits, Tsu
  • Older Humic Soil
  • Older Inbi stage intrusive rocks
  • Older Josho Lake Deposit
  • Older Kitadake Volcano
  • Older Lower Terrace Deposits, Tsu
  • Older Middle Terrace Deposits, Tsu
  • Older Minamidake Volcano
  • Older Naeba volcanic products
  • Older Obasute Mudflow Deposit
  • Older Okemi Landslide Deposits
  • Older Ontake Volcanic Rocks
  • Older Oshima Group
  • Older parasitic cone and crater, Miyakejima volcano
  • Older period, Yatsugatake volcano
  • Older Pyroclastic Flow Deposit, Iiji volcano
  • Older ring dyke
  • Older Ryoke Granitoids
  • Older Sand Dune, Katamachi Sand Dune
  • Older Sand Dune Deposits, Fukui
  • Older Sand Dune Deposits, Kisakata
  • Older Shigayama Volcanic Rocks
  • Older Shinodayama Gravel Bed
  • Older stage, Norikura volcano
  • Older stage, Shirouma-Oike volcano
  • Older stage, Tokachidake volcano
  • Older stage Hokusatsu Volcanic Rocks
  • Older stage Nansatsu Volcanic Rocks
  • Older Stratovolcano (Akagi Volcano)
  • Older Stratovolcano (Iwaki volcano)
  • Older stratovolcano (Tashirodake volcano)
  • Older Talus Deposits, Tsuge
  • Older Terrace Deposits, Nagaragawa river
  • Older Terrace Deposit, Taira
  • Older Volcanic Fan Deposit, Daisen volcano
  • Older Volcanic Fan Deposit, Nekoma volcano
  • Older volcano, Daisen volcano
  • Older Yakedake volcanoes
  • Oldest Fan Deposits
  • Oldest plutonometamorphic rocks
  • Oldest stage Nansatsu Volcanic Rocks
  • Old Fan Deposits
  • Old Iwate volcano
  • Old Somma Deposits, Hakone volcano
  • Old stage Lava, Minami-Hakkoda volcanoes
  • Old Tephra Group
  • Old volcanoes, Hachijojima volcano
  • OM1
  • OM1-OK III
  • Omachi APm
  • Omachi Loam
  • Omachi Sandstone
  • Omachi Tephra
  • Omae Unit
  • Omaezaki Alternation
  • Omaezaki Terrace Deposits
  • Oma Formation, Aomori pref.
  • Oma Formation, Shizuoka pref.
  • Omagari carbonate islet
  • Omagari Formation
  • Omaki Diorite
  • Omama Complex
  • Omama Terrace Deposit
  • Omanako volcano
  • Omata Formation
  • Omatagawa Mudstone Member
  • Omata Pyroclastic Rocks
  • Omatsukura Lava
  • Omatsukura volcano
  • Omatsuzawa Formation
  • Ome Formation
  • Omeshi Lava
  • Omeshi volcano
  • Omichidani Formation
  • Omichi Granite
  • Omi Complex
  • Omig
  • Omigawa Formation
  • Omigawa Unit
  • Omi Granite
  • Omika Formation
  • Omi Limestone
  • Omi Limestone Group
  • Omi Metamorphic rocks
  • Ominagawa Formation
  • Omine Acidic Tuff Bed
  • Omine Conglomerate
  • Omine Debris Deposits
  • Omine Formation, Nagano pref., Pliocene
  • Omine Formation, Nagano pref., Pleistocene
  • Omine Granitic Rocks
  • Omine Granodiorite
  • Omine Gravels
  • Omine Lava
  • Omine Mudstone Member
  • Omine-Odai Acidic Igneous Rocks
  • Omine-Odai Acidic Rocks
  • Omine-Odai caldera
  • Omine Pyroclastic Flow Deposit
  • Omine Sandstone Shale Member
  • Omine Welded Tuff Bed
  • Omineyama Basalt
  • Omineyama Formation
  • Omineyama Member
  • Omitsu Gravel Bed
  • Omi White Tuffs
  • Omiya Formation
  • Omma Formation
  • Omma Sandstone Formation
  • Omodani Formation
  • Omodani Mass
  • Omodani Rhyolites
  • Omogawa Formation
  • Omokawa Formation
  • Omori Formation
  • Omoriyama Andesite
  • Omoriyama Formation
  • Omorozawa Member
  • Omosu Formation
  • Omotezawa Formation
  • Omoto Formation
  • Om-SK110
  • Omt
  • Omuro Lava
  • Onabezawa Andesite Member
  • Onagadani Pyroclastic Rocks
  • Onagane Lava
  • Onagata Subunit
  • Onagawa Formation
  • Onagi Welded Tuff
  • Onagurayama Andesite
  • Onamedake Lava
  • Onamedake Pyroclastic Cone Deposit
  • Onarisawa Formation
  • Onawashiro Lava
  • Onazaka Tuff Member
  • Onbara Granite
  • Onbasejima volcano
  • Onbegawa Tephra
  • Onbetsu Group
  • On-Byk
  • Onenai Formation
  • Oneyama Lavas
  • On-Fk
  • Ongata Formation
  • Ongata Tephra
  • Onibushi Formation
  • Onigajo Lava
  • Onigatsuji Mudstone and Sandstone Member
  • Onigatsura Volcanic Rocks
  • Oniike Formation
  • Onikobe caldera
  • Onikobe-Ikezuki Tephra
  • Onimaru Formation
  • Onioshidashi Lava
  • Onishibetsu Formation
  • Onishi Conglomerate Member
  • Onishi Formation
  • Onita Formation
  • Onitaro Metamorphic Rocks
  • Oniu Formation
  • Oniu Member
  • Onizaki Formation
  • Onizawa Stage
  • Onizawa-Takayamazawa Pyroclastic Flow Deposit
  • Onjuku Shell Bed
  • On-Ki
  • On-Kn
  • On-Kr
  • On-Kt
  • Onma Formation
  • Onma Sandstone Formation
  • On-Mt
  • Onnagawa Formation
  • Onnaiwa Lava
  • On-NG
  • Ono caldera
  • Onoda Formation, Miyagi pref.
  • Onoda Formation, Aichi pref.
  • Ono Formation, Iwate pref.
  • Ono Formation, Fukushima pref.
  • Ono Formation, Shizuoka pref.
  • Ono Formation, Hyogo pref.
  • On-Og
  • Onogahara Formation
  • Onogahara Group
  • Onogawa Hard Shale Member
  • Onogawa Formation
  • Onogawa Group
  • Onogi Formation
  • Onomatsuzawa Formation
  • Onomi Conglomerate Member
  • Onomi Gravel
  • On-Ot
  • Ono Terrace Deposits
  • Onozawa Gravel
  • On-Pm1
  • On-Pm1'
  • On-Pm2
  • On-Pm2'
  • On-Pm3
  • On-Pm3'
  • On-Sk
  • On-Sn
  • On-Ss
  • Ontake-Byakubi Tephra
  • Ontake volcano
  • Onuki Formation
  • Onuma Formation
  • On-Yn
  • On-Ys
  • Onzawa Facies
  • Ooi 1
  • Ooi 2
  • Ooka Mudflow Deposit
  • Oomigawa Formation
  • OP
  • OP1
  • OP2
  • Opirarukaomappu Body
  • Oppara Formation
  • Oppata Granite
  • OR
  • OR-1a
  • OR-1b
  • OR-2
  • OR-3
  • Orakumaigawa Formation
  • Oriai Formation
  • Oribeyama Formation
  • Oridani Granodiorite Porphyry
  • Orido Tuff Member
  • Origamizawa Formation
  • Orikabe-1a type
  • Orikabe-1b type
  • Orikabe-2 type
  • Orikabe-3 type
  • Orikabe Quartz Monzonite
  • Orikabetoge Formation
  • Orikabe type
  • Orikabezawa Body
  • Orikado Basalt and Mudstone Member
  • Oritate Conglomerate
  • Oritate-toge Conglomerate
  • Orito Formation, Niigata pref.
  • Orito Formation, Ishikawa pref.
  • Orito Member
  • Oritoyama Basalt
  • Oritsuki Member
  • Oritumedake Fan Deposit
  • Oriwatari Formation
  • Orobetsu Formation
  • Oro Formation, Aichi pref.
  • Oro Formation, Kyoto pref.
  • Oro Formation, Shimane pref.
  • Orojidani Formation
  • Oro Rhyolite
  • Orose Formation
  • Oroshi Tephra
  • OS
  • Osadano Formation
  • Osafuji Quartz Diorite
  • Osagawa Formation
  • Osagawa Lava
  • Osaka Dacite
  • Osakada Gravel
  • Osakada Loam
  • Osaka Group
  • Osakamoto Formation
  • Osaka Pyroclastic Rocks
  • Osakatoge Complex
  • Osakatoge Formation
  • Osakawan Formation
  • Osakihana Dacite
  • Osaki volcano
  • Osako Complex
  • Osanai Member
  • Osanai Tuff Member
  • Osarubegawa Formation
  • Osarugawa Tephra
  • Osarushinai Formation
  • Osarushinaigawa Formation
  • Osato Group
  • Osato Loam
  • Osatsu Complex
  • Osatsu Tephra
  • Osawa Conglomerate
  • Osawa Formation, Akita pref.
  • Osawa Formation, Miyagi pref.
  • Osawa Formation, Yamagata pref.
  • Osawa Formation, Sanjo city, Niigata pref.
  • Osawa Formation, Uonuma hills, Niigata pref.
  • Osawa Formation, Tochigi pref.
  • Osawa Formation, Atsugi city, Kanagawa pref.
  • Osawa Formation, Hayama city, Kanagawa pref.
  • Osawagawa Formation
  • Osawa Granite Porphyry
  • Osawaguchi Tuff Member
  • Osawa Lava Dome
  • Osawano Terrace Deposits
  • Osawa Pyroclastic Flow Deposit
  • Osawa Terrace Deposit
  • Osawatoge Formation
  • Osawa Tuff
  • Osawa type, Miyako Granite
  • Osawa volcano
  • Osawayama Body
  • Osegawa Pyroclastic Flow Deposit
  • Osenuma Lavas
  • Osg
  • Oshida Conglomerate Member
  • Oshidashi Formation
  • Oshidomari Formation
  • Oshidomari Lava
  • Oshidomari-pon'yama Lava Dome
  • Oshika Gravel Bed
  • Oshika Scoria Group
  • Oshikiri Shell Bed
  • Oshima Belt
  • Oshima Formation, Miyagi pref.
  • Oshima Formation, Fukui pref.
  • Oshima Group
  • Oshima-Kojima volcano
  • Oshima Rhyolite
  • Oshimatadani Unit
  • Oshima Volcanic Rock Member
  • Oshima volcano
  • Oshimayama Subunit
  • Oshimizu Formation
  • Oshimojo Formation
  • Oshinara Formation
  • Oshinuma Formation
  • Oshinuma Pumice Group
  • Oshinuma Sand and Gravel Formation
  • Oshio Formation
  • Oshio Pyroclastic Flow Deposit, Chino, Nagano pref.
  • Oshio Pyroclastic Flow Deposit, Omachi, Nagano pref.
  • Oshi Pyroclastic Flow Deposit
  • Oshirabetsu Body
  • Oshirabetsu gabbroic complex
  • Oshirabetsu gabbroic mass
  • Oshirabetsu Plutonic Complex
  • Oshirakawa Complex
  • Oshirasawa Granite
  • Oshiri Granite
  • Oshiromori Lava
  • Oshiromori Lava Domes
  • Oshiromori Volcanic Products
  • Oshiromoriyama Lavas
  • Oshoro Formation
  • Oshosan Lava
  • Oshosan products
  • Os-Nm
  • Osobudani Conglomerate
  • Osobudani Pumice Flow Deposit
  • Osodani Formation
  • Osoki Formation
  • Osomaike Facies
  • Osone Formation
  • Osorezan volcano
  • Osoushinai Formation
  • Osozawa Formation
  • Osozawa Sandstone Member
  • Osr
  • Os Tuff
  • Osuga Tuff Member
  • Osumi Granodiorite
  • Osuzuyama caldera
  • Osuzuyama Acidic Igneous Rocks
  • Ot
  • Ot1
  • Ot1 Unit
  • OT10
  • Ot2
  • Ot2 Unit
  • OT21
  • OT3
  • Ot3 Unit
  • Ot4
  • OT5
  • Otadai Formation
  • Ota Formation
  • Otagawa Formation
  • Otagiri Formation
  • Otagirigawa Pyroclastic Flow Deposit
  • Otagiri Granite
  • Ota Group
  • Otakidani Formation
  • Otaki Dolerite
  • Otaki Formation, Yamagata pref.
  • Otaki Formation, Gifu pref.
  • Otaki Group
  • Otaki Lava
  • Otaki Mudstone and Tuff Member
  • Otakisawa Body
  • Otakisha Lava
  • Otakiyama Welded Tuff
  • Otakizawa Formation, Aomori pref.
  • Otakizawa Formation, Fukushima pref.
  • Otakizawa Pumiceous Volcaniclastic Rocks
  • Otama Formation
  • Otanabe Formation
  • Otana Body
  • Otani Conglomerate Member
  • Otani Formation, Fukushima pref.
  • Otani Formation, Niigata pref.
  • Otani Formation, Fukui pref.
  • Otanigawa Formation, Upper
  • Otanigawa Formation, Lower
  • Otanigawa Tuff
  • Otaniike Tephra
  • Otani Lavas
  • Otani Tephra, Aichi pref.
  • Otani Tephra, Shiga pref.
  • Otaniyama Formation
  • Otanoshike Formation
  • Ota Pumiceous Volcaniclastic Rocks
  • Otarionsen Formation
  • Otaru Formation
  • Otarunaigawa Formation
  • Ota Tephra
  • Ota Tuff Member
  • Otawara Pyroclastic Flow Deposit
  • Otawara Pyroclastic Flow Deposits
  • Otbt
  • Otchizawa Formation
  • Otoda Formation
  • Otodani Gabbro
  • Otoebetsugawa Formation
  • Oto Formation, Fukushima pref.
  • Oto Formation, Gunma pref.
  • Otogai Tuff Breccia Member
  • Otogawa Formation, Toyama pref.
  • Otogawa Formation, Aichi pref.
  • Otoge caldera, Yamagata pref. - Fukushima pref.
  • Otoge caldera, Aichi pref.
  • Otoge Cone Sheet
  • Otoge Formation
  • Otoge Tuff
  • Otoge Volcanic Complex
  • Otokogawa facies
  • Otomari Tuff
  • Otomiyama Formation
  • Otonashigawa Belt
  • Otonashigawa Group
  • Otonashigawamuro Formation
  • Otone Formation
  • Otonoyama Formation
  • Otori Formation, Iwate pref.
  • Otori Formation, Fukushima pref.
  • Otori Unit
  • Otose Formation
  • Otose Green Tuff Formation
  • Otoyama Tuff Member
  • Oto-zan lava flow
  • Otozawa Terrace Deposits
  • OtP
  • Ot pfl
  • Otsubo Formation
  • Otsu channel
  • Otsu Formation, Ibaraki pref.
  • Otsu Formation, Shimane pref.
  • Otsujishinden Tephra
  • Otsuka Formation, Miyagi pref.
  • Otsuka Formation, Kanagawa pref.
  • Otsukamiya Granite
  • Otsukata Tuffaceous Sandstone
  • Otsukigawa Mudflow Deposit
  • Otsuku Member
  • Otsu Member
  • Otsunagi mass
  • Otsutsumi Formation
  • Oubayama Formation
  • Ouchidani Granite
  • Ouchi Formation
  • Oura Formation
  • Oura Granite
  • Oura Member, upper
  • Oura Member, middle
  • Oura Member, lower
  • Owada Formation
  • Owadasawa Lava
  • Owa Hornblende-bearing Andesite Member
  • Owandawan Conglomerate
  • Owani Lacustrine Deposit
  • Owarabi Debris Avalanche Deposit
  • Owari Coal-bearing Facies
  • Owarino I Terrace Deposit
  • Owarino II Terrace Deposit
  • Owasawagawa Formation
  • Owasegawa Tuff
  • Owase Group
  • Owase-Shirahama Pyroclastic Rocks
  • Oyabe Formation
  • Oyabe Mudstone Formation
  • Oyachi Body
  • Oyachi Lava
  • Oyachi Member
  • Oyachi Tephra
  • Oya Formation
  • Oya Group
  • Oyakawa Sandstone and Conglomerate Formation
  • Oyakejima Formation
  • Oyakisuna Lava
  • Oyakkotsu Lava Dome
  • Oyama Andesite
  • Oyamada Formation
  • Oyamadan Granite
  • Oyamado Formation, Lower
  • Oyamado Formation, Upper
  • Oyama Formation, Yamagata pref.
  • Oyama Formation, Niigata pref.
  • Oyama Formation, Kanagawa pref.
  • Oyama Formation, Mie pref.
  • Oyama Pyroclastic Rocks Member
  • Oyama Subgroup
  • Oyama Tuffaceous Sandstone Formation
  • Oya Mudflow Deposit
  • Oyana Formation
  • Oyanagawa Formation
  • Oyasawa Complex
  • Oyashirazu Formation
  • Oyatsu white pumice flow deposit
  • Oya Volcanic Rocks
  • Oyl
  • Oodo Formation
  • Oyodo Member
  • Oyori Mudstone
  • Oyori Silt
  • Oyp
  • OyP
  • OyP'
  • Oyu Granite
  • Oyu Welded Tuff Member
  • Oz
  • OZ
  • Ozaki Formation
  • Ozasa Formation
  • Ozasa Nuees Ardentes
  • Ozasu Tuff Member
  • Ozawa Body
  • Oze Formation
  • Ozenji Formation
  • Ozo Formation
  • Ozohara Tephra
  • Ozohara Tuff Bed
  • Ozone Formation
  • Ozono Unit
  • Ozuchi Formation
  • Ozuchi Tonalite
  • Ozuki Tuff and Shale Member
  • Ozumi Formation
  • Ozu Unit I
  • Ozu Unit II
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