Ia
I Alternation of Sandstone and Mudstone
Ib
Ibaraki Clay Formation
Ibaraki Lavas
Ibonai Terrace Deposit
Ic
IC
Icchoda Formation
Icchoda Member
Ichido Mudstone and Sandstone Member
Ichihara I Terrace Deposits
Ichihara II Terrace Deposits
Ichihara III Terrace Deposits
Ichihasama Pumice
Ichijiku Formation
Ichijo Andesite
Ichijuku Formation
Ichikawadaimon Formation
Ichiki Acidic Volcanic Rocks
Ichinanbayama Lava
Ichinohe Granite
Ichinohe Pluton
Ichinokawa Formation
Ichinokoshi Lavas
Ichinomata Basalt
Ichinomatakawa Lavas
Ichinomatazawa Basalt Member
Ichinomegata maar
Ichinomiya Gravel Bed
Ichinonohara Tuff Member
Ichinono Member
Ichinosaka Lava
Ichinosaka Tuff
Ichinosawa Body
Ichinosawa Formation
Ichinosawa Granite
Ichinosawa Pyroclastic Flow Deposit
Ichinosawa Tephra
Ichinosawa Unit
Ichinose Formation
, Iiyama, Nagano pref.
Ichinose Formation
, Matsumoto, Nagano pref.
Ichinose Formation
, Yamanashi pref.
Ichinose Formation
, Fukui pref.
Ichinose Member
Ichinose Rhyolite
Ichinose Sandstone and Conglomerate Facies
Ichinose Sandstone and Conglomerate Member
Ichinotani Formation
Ichinotogawa Pyroclastic Flow Deposit
Ichinowatari Formation
Ichinoya Formation
Ichirozawa Lava
Ichishi Group
Idaira Formation
Ida volcano
Idekami Formation
Idodake Lava
Idodake Pyroclastic Rocks
Idodakesancho Explosion Breccia
Idodakesancho lava dome
Idoirisawa Member
Idonnappu Belt
Idonnappu Zone
Idozawa Formation
, Gunma pref., Miocene
Idosawa Formation
, Gunma pref., Triassic
Idosawa Formation
, Tokyo
Ieki Formation
Ieki Sandstone and Mudstone Member
Ie Unit
Iga Formation
Igarashi Lava I
Igarashi Lava II
Igarashi Lava III
Igarashi Lava IV
Igarashi Lava V
Igarashi Lava VI
Igarashi Lava Dome
Igarashi Pyroclastic Flow Deposit
Igarashisekishoku Lava
IH
Ihara Group
Iheya Unit
Ihoridanitoge Conglomerate
Ihoridanitoge Conglomerate Member
Iida Diatomaceous Mudstone Formation
Iida Formation
, Ishikawa pref.
Iida Formation
, Chichibu city, Saitama pref.
Iida Formation
, Ogawa city, Saitama pref.
Iidesan Granodiorite
Iigamori Lava
Iijichuo Lava Dome
Iijima Tuff
Iiji volcano
Iikura Conglomerate Member
Iimori Formation
Iimori Unit
Iimoriyama Lava
Iimoriyama parasitic cone
Iimuro Formation
Iitomi Formation
Iizawa Formation
Iizuka Diatomaceous Mudstone Formation
Iizuka Formation
Iizume Formation
, upper
Iizume Formation
, lower
Iizuna Basalts
Iizuna Formation
Iizuna Lava
Iizuna proper strato-volcanic products
Iizuna Pyroclastic Flow Deposit
Iizuna Tuff
Iizuna Volcanic Ash
Iizuna Volcanic-Fan Deposit
Iizuna volcano
Iizuna volcano caldera Lacustrine Deposit
Iizunayama Lava
, Iizuna city
Iizunayama Lava
, Takayama city
Ij
Ijimi Granite
Ij-MO
IjT
Ik
Ikadaba Terrace Deposit
Ikadachi II
Ikarigaseki caldera
Ikarigaseki Formation
Ikari Sandstone Member
Ikb-1
Ikeda Formation
Ikego Formation
Ikeda Group
Ikego Pyroclastic Formation
Ikejirigawa Debris Avalanche Deposit
Ikejirigawa Mudflow
Ikenohara Coarse Sandstone Member
Ikenohara Formation
Ikenosawagawa Lava
Ikenosawa Lava
Ikenotaira-bokujo Lavas
Ikenotaira Lava
Ikenotaira pyroclastic cone
Ikenouchi Formation
Ikenoue Formation
Iketsuki Tuff
Ikezuki Tuff
Ikime Formation
Ikobe Gravel Member
Ikokuma Agglomerate Member
Ikokuma Andesites
Ikokuma Formation
Ikudo Formation
Ikumo Caldera
Ikumo cauldron
Ikumo Formation
Ikunoura Formation
Ikushunbetsu Formation
Ikuta Formation
Imabetsu Andesites
Imabetsu Volcanic Rocks
Imaichi Pyroclastic Flow Deposit
Imaidani Group
Imai Formation
Imai Gravels
Imaizumi Formation
Imaizumigawa Formation
Imaizumi Sandstone and Conglomerate Member
Imajo Formation
Imajuku Formation
Imajuku Sandstone Member
Imakuma I Tephra
Imakuzure Formation
Imasaki Lava
Imaura Group
Imizu Formation
Imogawa Member
Imogawa Tuff
Imokubo Conglomerate Formation
Imokubo Formation
Imokubo Gravel Formation
Imono eclogite
Imono mass
Imosawagawa Formation
Imoya Body
Imozu Conglomerate Member
Inada Granite
Inagawa Complex
Inagawa Granite
Inagawa Granodiorite
Inagawa Group
Inagawa Sandstone Member
Inagi Formation
Inagobokujo Lava
Inagodake Lavas
Inagodake Pyroclastic Flow Deposit
Inagoe Formation
Ina Group
Inaguratoge Andesite
Inai Group
Inakozawa Formation
Inakozawa Mudstone Formation
Inakuradake Lava
Inambajima volcano
Inamura Andesite
Inamura Formation
Inaritai Lacustrine Deposit
Inarizaka Loam
Ina Sandstone Member
Inase Formation
Inashibetsu Tuff
Inashibetsu Tuff Member
Inatori Mudflow Deposit
Ina Tuff Breccia Member
Inawashiro Calderas
Inbi stage volcanic rocks
Ine Group
Initial stage
, Rishiri volcano
Initial volcanic edifice
In-Kt
In-KT
In-KTa
Innai Tuff
Innai Tuff Member
In-Ny
Inogama Formation
Inotani Alternation Member
Inotani Alternation of Sandstone and Shale Member
Inotani Formation
Inou Volcanic Ash
Inp
Intrusive pyroclastic rocks
, Kumano Acidic Rocks
Intrusive Pyroclastic Rock
, Ikumo caldera
Inubo Group
Inubozaki Formation
Inugasako Breccia Member
Inugashirayama Complex
Inui Group
Inukura Debris Flow Deposit
Inukura Lava
Inukura volcano
Inukurayama Lava
Inumodorikyo Complex
Io
Iodake Crystalline Schist
Iodakekabu Lava
Iodakejobu Lava
Iodake Lava
, Aomori pref.
Iodake Lavas
, Aomori pref.
Iodake Volcanic Rocks
, Nagano pref.
Iodake Welded Tuff
Iogawa Lava
Ioridanitoge Formation
Iori Formation
Iori Granodiorite
Iozawa Metasomatic Rocks
Iozen Formation
Ippongihara Debris Avalanche Deposit
Ippongi Lapilli Member
Ipponmatsuyama Formation
Ir1 Pyroclastic Flow Deposit
Irahara Granodiorite
Irakawa Formation
Irawara Granodiorite
Iratsu mass
Irg
Iriai Formation
Irieno Formation
Iridogawa Lava
Iriishikura? Formation
Iriki Pyroxene Andesite
Irimazawa Member
Irimizuzawa Green Tuff
Irinotaira Formation
Iriomote Formation
Irisawa Formation
Irishiken Granite
Irishiken Granodiorites
Irisugaya Formation
Iritamo Rhyolites
Iritono mass
Iriyamagawa Tuff
Iriyama Sandstone Facies
Iriyama Sandstone Member
Iriyamazawa caldera
Iriyamazawa Formation
Iriyamazawa Tuff
Irohazaka Welded Tuff
Irozaki Andesite
Irozaki Tuff Breccia Formation
Iruma Formation
, Saitama pref.
Iruma Formation
, Shimane pref.
Is
IS-1
IS-2
Isabu Formation
Isatomae Formation
Isawagawa Fan Deposit
Isawagawa Formation
Isbt
Isegi Sandstone and Mudstone Member
Iseyama Formation
Isg-c
Isg-e
Isg-f
Isg-g
Isg-h
Ishiai Member
Ishibatake Conglomerate Member
Ishido Formation
, Saitama pref.
Ishido Formation
, Chiba pref.
Ishido Group
Ishido Siltstone Formation
Ishifune Formation
Ishifutagarisawa Formation
Ishifutagarisawa Mudstone Member
Ishigami Formation
, Saitama pref.
Ishigami Formation
, Tokyo
Ishigami Terrace Deposit
Ishigamori Dacite
Ishihagegawa Lava
Ishihagegawa Volcanic Rocks
Ishiji Alternation
Ishiji Sandstone
Ishiji Sandstone and Mudstone Alternation
Ishikari Dune Sand
Ishikari Group
Isihkawa mass
Ishiki Formation
Ishikoshi Andesite
Ishikura Formation
Ishikurayama Formation
Ishimoriyama Tuff Breccia Member
Ishinazaka Terrace Deposit
Ishiwaritoge Formation
Ishiwariyama Body
Ishiyama Lava
Ishiyama Lava Dome
Ishizaka Formation
Ishizaka Rhyolite
Ishizaka rhyolitic lava
Ishizaka Tuff
Ishizaki Formation
Ishizawagawa Formation
Ishizuchi Group
Ishizuchi Igneous Rocks
Isoai Formation
Isodayama Formation
Isojirozawa Shale Formation
Isokusa Formation
Isomatsu Formation
Iso Pyroclastic Flow Deposit
Iso Tuffaceous Sandstone Member
Isoura Formation
Issaikyo Unit
Issaikyoyama volcano
Isso Conglomerate Member
Isso Formation
Isozaki Formation
Isshiki Tuff
Isumi 1 Terrace Deposits
Isumi 1 (Yoshifu) Terrace Deposits
Isumi 2 Terrace Deposits
Isumi 3 Terrace Deposits
Isumigawa Shell Bed
Itabashi Formation
Itabatake Formation
Itado Andesite
Itadome Formation
Itahana Formation
Itami Formation
Itaoroshitoge Formation
Itaoroshitoge Siltstone Member
Itaoroshitoge Tuff and Shale Member
Itaya Alternation Member
Itaya calderar
Itaya Formation
(Yamagata)
Itaya Formation
(Toyama)
Itayama Tuff
Itaya Sandstone and Siltstone Member
Itaya Tuff
Itazawa Lahar deposit
Itchoda Formation
Itoi Pumice Flow Deposit
Itokaya Lava
Itokaya Pyroclastic Flow Deposit
Itoman Formation
Itonashi volcano
Itoo Formation
Ito Pumice Flow Deposit
Ito Pyroclastic Flow Deposit
Itoshima Granodiorite
Itoshiro Subgroup
Itsukaichimachi Group
Itsukamachi Sandstone
Itsuki Formation
Ittori Formation
Itukamati Muddy Sands
Itukamati Sandstone Member
Iu Formation
IW1
IW2
Iwade Formation
, Tochigi pref.
Iwade Formation
, Wakayama pref.
Iwadeyama Pumice
Iwadono Formation
Iwadonozawa Formation
Iwagamiyama Formation
Iwagoyama Granite
Iwahata Limestone Member
Iwahatayama Lava
Iwaibukuro Formation
Iwaidani Lava
Iwaidani Mylonite
Iwai Formation
Iwaine Formation
Iwaine Group
Iwaisawa Lava
Iwaizaki Formation
Iwaizaki Limestone
Iwaizumi Belt
Iwaizumi Belt
Iwaizumi Formation
Iwaizumi Group
Iwajuku Terrace Deposit
Iwaki Formation
, Shiramizu Group
Iwaki Formation
, Chichibu Belt
Iwakisan Volcaniclastic Rocks
Iwakisan volcano
Iwaki Terrace Deposits
Iwakokekotani Lavas
Iwakoyama Formation
Iwakuni Granite
Iwakura Formation
Iwakura Lava
Iwakura Pyroclastic Flow Deposit
Iwakurayama Body
Iwakurayama Complex
Iwakurayama Rhyolite
Iwamatsu Formation
Iwami Formation
Iwami Granite
Iwamizawa Formation
Iwamura Group
Iwamuro Formation
Iwamurotoho Ultramafic Rocks
Iwanamesawa Mudstone Member
Iwane Rhyolite
Iwano Formation
Iwanosawa Formation
Iwaobashi Sandstone Member
Iwaodaki Tuffaceous Sandstone Member
Iwao Formation
Iwaoji Formation
Iwappara Lava
Iwasaka Formation
Iwase Tuff
Iwashimizu Complex
Iwashimizu Conglomerate Formation
Iwashimizu Formation
Iwashimizu Lava
Iwashita Andesites
Iwatake Glaciolacustrine Deposits
Iwatake stage
Iwatakeyama Welded Tuff
Iwataki Welded Tuff
Iwate-Fudotai Tephra
Iwate-Kariya Scoria
Iwate-Oide Scoria
Iwate-Okawakaitaku Scoria
Iwate-Shirishida Scoria
Iwate-Suko Scoria
Iwate volcanic group
Iwate volcano
Iwatoyama Formation
Iwatsubodani Formation
Iwatsubodani Lava
Iwatsubodani Pyroclastic Rocks
Iwatsubodanigentou Lava
Iwatsuboyama Lava
Iwatsuboyama volcano
Iwatsuboyama Welded Tuff
Iwaya Formation
Iwaya Granite
Iwayakan'non stratovolcano
Iwayakannon Lava
Iwayama Lavas
Iwayatani Member
Iw-Fd Tephra
Iw-KS Tephra
Iw-OdS Tephra
Iw-OkS Tephra
Iw-ph1 Tephra
Iw-ph2 Tephra
Iw-ph3 Tephra
Iw-ph4 Tephra
Iw-ph5 Tephra
Iw-ph6 Tephra
Iw-ph7 Tephra
Iw-ph8 Tephra
Iw-ph9 Tephra
Iw-ph10 Tephra
Iw-ph11 Tephra
Iw-ph12 Tephra
Iw-SS Tephra
Iw-SuS Tephra
Iw-W6a Tephra
Iw-W6b Tephra
Iw-W6c Tephra
Iw-W6d Tephra
Iw-W7a Tephra
Iw-W8a Tephra
Iw-W8b Tephra
Iw-W9 Tephra
Iy
Iz
Iz1 Pyroclastic Flow Deposit
Iz2 Pyroclastic Flow Deposit
Izaki Olistolith
Izaku Pyroclastic Flow Deposit
Izeki Formation
IZ-FM
Iz-Kt
Iz-KTa
Iz-Ny
Izumi Formation
Izumigatake volcano
Izumi Group
Izumi Terrace Deposits
Izumiyatsu Member
Izumiyatsu Mollusca Belt
Izu-Oshima 2013 Lahar Deposit
Izu-Oshima S
2
-c Lahar Deposit
Izu-Oshima volcano
Izuo Unit
Izuriha Complex
Izuru Formation
Izuruha Acidic Rocks
Izuruha Plutonic Rocks
Izusan Dacite