- N1, Wakayama pref.
- N1 Formation, Fukui pref.
- N1 Member, Tokyo
- N2, Wakayama pref.
- N2 Formation, Fukui pref.
- N2 Member, Tokyo
- N3, Wakayama pref.
- N3 Formation, Fukui pref.
- N3 Member, Tokyo
- N4, Wakayama pref.
- N4 Formation, Fukui pref.
- N4 Member, Tokyo
- N5, Wakayama pref.
- NA2
- NA3
- NA4
- NA4.2
- NA6
- NA6.5
- NA7
- NA8
- NA9
- NA10
- NA11
- NA12
- NA12.8
- NA13
- NA13C
- NA13D
- NA14
- NA16
- NA16A
- NA16B
- NA18
- NA19
- NA21B
- NA22A
- NA23
- NA24
- NA24A
- NA24B
- NA24C
- NA24E
- NA25
- NA26
- NA26A
- NA26B
- NA26C
- NA27
- NA27A
- NA27B
- NA28
- NA29
- NA30
- NA31
- NA31A
- NA31B
- NA32
- NA33
- NA33A
- NA33B
- NA33C
- NA33D
- NA33E
- NA33F
- NA34
- NA35
- NA37
- NA37A
- NA37B
- NA37C
- NA37D
- NA37E
- NA37F
- NA38
- NA39
- NA40
- NA41
- NA42
- NA43
- NA44
- NA45
- NA46
- NA50
- NA60
- NA75
- NA80
- Naarai Formation
- Nabae Group, Maizuru Belt
- Nabae Group, southern Shimanto Belt
- Nabemori Lava
- Nabemoriyama Dome Lava
- Nabeshima Formation
- Nabetachiyama Formation
- Nabewarikawa Debris Avalanche Deposit
- Nabeyama Andesite
- Nabeyama Formation, Tochigi pref.
- Nabeyama Formation, Shimane pref.
- Nabeyama Pyroclastic Cone
- Nabi Formation
- Nabigawa Formation
- Nabiro Tuff
- Nabi Unit
- Nabuto Formation
- Nachisan Lava
- Nachisan volcano
- Nadachi Formation
- Nada Formation
- Naeba volcano
- Nadegi Pyroclastic Flow Deposit
- Naegawa Dolerite
- Naegi-Agematsu Granite
- Naegi Granite
- Naeshiroda Formation
- Na-G
- Nagadozaka Formation
- Nagahama Formation
- Nagahama Mudstone Member
- Nagahama Sand and Gravel Member
- Nagahama volcano
- Nagahara Lava
- Nagahata Acidic Rocks
- Nagaike Formation
- Nagaiso Formation
- Nagaiwa Formation, Iwate pref.
- Nagaiwa Formation, Nagano pref.
- Nagaiwa Lapilli Tuff Member
- Nagaiwa Member
- Nagakura Formation
- Nagakute 0 Tephra
- Nagakute I Tephra
- Nagakute II Tephra
- Nagakute Tephra
- Nagane Formation
- Nagano Formation, Fukui pref., Hida Gaien Belt
- Nagano Formation, Fukui pref., Kuzuryu Group
- Nagano Formation, Kagoshima pref.
- Nagano Group
- Nagano Volcanic Ash
- Naganuma Formation
- Nagao Formation, Miyag pref., Miocene
- Nagao Formation, Miyagi pref., Jurassic
- Nagao Formation, Shizuoka pref.
- Nagaogawa I Terrace Deposit
- Nagaogawa II Terrace Deposit
- Nagaogawa III Terrace Deposit
- Nagaogawa IV Terrace Deposit
- Nagaogawa V Terrace Deposit
- Nagaogawa VI Terrace Deposit
- Nagaogawa VII Terrace Deposit
- Nagaogawa Sandstone Member
- Nagaoka Formation
- Nagao Sandstone and Mudstone Member
- Nagao Sandstone Member
- Nagaoyama Conglomerate and Sandstone
- Nagaoyama Formation, Jinzu Group
- Nagaoyama Formation, Inagawa Complex
- Nagaoyama Formation, Kunisaki Complex
- Nagaoyama Gravels
- Nagaoyama Lava
- Nagareya Formation
- Nagasaka Formation
- Nagasaka Pyroclastic Flow Deposit
- Nagasaki Dacite
- Nagasaki Formation, Iwate pref.
- Nagasaki Formation, Miyagi pref.
- Nagasaki Formation, Nagano pref.
- Nagasakihana Formation
- Nagasawa Formation
- Nagasawa Tephra
- Nagashiri Tuff
- Nagasu Formation
- Nagatani Member
- Nagato Formation
- Nagatogawa Formation
- Nagatogawa Granite
- Nagatogawa Group
- Nagato Lavas
- Nagato mass
- Nagatoro Tuff
- Nagatsuda Formation
- Nagauhara Lava
- Nagawa Granite
- Nagayagawa Tephra
- Nageiredo Tuff Breccia
- Nagime Formation
- Nagisan Andesites
- Nagizawa Andesite Dykes
- Nago Formation
- Nagumiwan Lava
- Nagumo Pumice Flow Deposit
- Nagura Formation
- Nagurasawa Pyroclastic Flow Deposit
- Naha Formation
- Naha Formation, Shimajiri Group
- Naiki Tephra
- Naizawa Complex
- Najimi Formation, upper
- Najimi Formation, lower
- Nakaazumayama volcano
- Nakabaru Formation
- Nakadai Formation
- Nakadaira Formation
- Nakadaiten-Higashidaiten volcano
- Nakadai Terrace Deposits
- Nakadai Terrace Gravel
- Nakadake Andesite
- Nakadake Body
- Nakadake Porphyrite
- Nakadake Pyroclastic Flow Deposit
- Nakadake Serpentinite
- Nakada Tuff and Mudstone Member
- Nakagaichi Formation, upper
- Nakagaichi Formation, lower
- Nakagawa Group
- Nakagawa Sandstone Member
- Nakagi Formation
- Nakagi Tuff Formation
- Nakagochi Formation
- Nakagomi Formation
- Naka Group
- Nakahama Two-pyroxene Andesitic Volcanic Rocks Member
- Nakahara Colluvial Deposit
- Nakahara Formation, Miyagi pref.
- Nakahara Formation, Yamagata pref.
- Nakahata Clays Member
- Nakahata Formation
- Nakahiruzen Lava
- Nakahiruzen volcano
- Nakahorizawa Debris Flow Deposit
- Nakaisshiki Formation
- Nakaisshiki Member
- Nakajima Conglomerate Member
- Nakajima-Osarugawa Tephra
- Nakajima Tuff Breccia Member
- Nakajima volcano, Kutcharo volcano
- Nakajima Volcano, Toya volcano
- Nakajogawa Member
- Nakakoshiki Formation
- Nakakubo Formation
- Nakamatanokkoshi Sandstone Member
- Nakamihara Formation
- Nakaminato Formation
- Nakaminato Group
- Nakamori Gabbro
- Nakamura Formation, Fukushima pref.
- Nakamura Formation, Nagano pref.
- Nakamura Formation, Gifu pref.
- Nakamura Member
- Nakamura Tephra
- Nakanami Formation
- Nakanami Mudstone Member
- Nakane Gravel Bed
- Nakano I Formation
- Nakano Body
- Nakanodani Lava
- Nakanogawa Group
- Nakanogawa Lava
- Nakanogo Formation
- Nakanokawa Group
- Nakanokawa Member
- Nakanokaya Conglomerate Member
- Nakanomatagawa Formation
- Nakanomata Granodiorite
- Nakanomata Mudstone Member
- Nakanomatanokkoshi Sandstone Member
- Nakanomata Tuff Breccia Member
- Nakanomine Lava
- Nakanosai Tephra
- Nakanosawa Formation
- Nakanosawa Lava
- Nakanosawa Member
- Nakanoshuku Tuff
- Nakanotake Metagabbros
- Nakanotoro Sandstone-Mudstone Member
- Nakanoumi Formation
- Nakanoyu Pyroclastic Rocks
- Nakaobara Formation
- Nakao Debris Flow Deposit
- Nakao Formation
- Nakaoku D1 Dyke
- Nakaoku D4 Dyke
- Nakaoku Formation
- Nakaoku tuffite dikes
- Nakao Lava
- Nakao Mud Flow Deposit
- Nakao Pyroclastic Flow Deposit
- Nakao Siltstone Member
- Nakaotoge Lava
- Nakao Tuff Member
- Nakaoyama Rhyolite Lava
- Nakasaki Tuff Member
- Nakasato 2 Tephra
- Nakasato Granite
- Nakasato Gravels and Clays Member
- Nakasato Sandstone Member
- Nakasato Tephra
- Nakasato Terrace Deposit
- Nakashichiban Unit
- Nakasuzu Formation
- Nakataro Formation
- Nakata Tuff
- Naka Tephra
- Nakato Formation
- Nakatomoda Tephra
- Nakato Unit
- Nakatsu Formation
- Nakatsugawa I Tephra
- Nakatsugawa II Tephra
- Nakatsugawa Complex
- Nakatsugawa Formation
- Nakatsugawa Group
- Nakatsugo Andesites
- Nakatsu Group
- Nakatsuhara Gravel
- Nakatsuhara Terrace Deposit
- Nakatsuhara Volcanic Breccia
- Nakatsuka Formation
- Nakatsukyo Formation
- Nakatsukyo Tuff Member
- Nakatsukyo Volcanic Breccia Member
- Nakatsuma Formation
- Nakatsu Volcanic Rocks
- Nakaumi Formation
- Nakawada Formation
- Nakawatari Formation
- Nakaya Loam
- Nakayamadaira Caldera Fill Deposit
- Nakayama Formation, Kurihara city, Miyagi pref.
- Nakayama Formation, Ishinomaki city, Miyagi pref.
- Nakayama Formation, Fukushima pref.
- Nakayama Formation, Niigata pref.
- Nakayama Formation, Tochigi pref.
- Nakayama Formation, Saitama pref.
- Nakayama Formation, Yamanashi pref.
- Nakayama Member
- Nakayama Propylite
- Nakayamatoge Sandstone and Conglomerate Member
- Nakayama Tuff
- Nakayashiki Sandstone, Mudstone and Conglomerate Member
- Nakazai Formation
- Nakazaiji Alternation Member
- Nakazato Formation, Hokkaido
- Nakazato Formation, Iwate pref.
- Nakazato Formation, Kazusa Group
- Nakazato Member
- Nakazawa Formation
- Nakazeki Tuff
- Nakijin Formation
- Nakiri Tuffaceous Sandstone
- Nakuidake Andesite and Pyroclastic Rock Member
- Nakuidake Andesite Member
- Nakuidake Volcanic Rock Member
- Namakodani Tephra
- Namba Formation
- Nambayama Formation
- Namegata Member
- Namegawa Debris Avalanche Deposit
- Namegawa Mudflow Deposit
- Namegawa Tuff Breccia
- Nameirizawa Formation
- Namekawa Formation
- Namera Granite
- Namigata Formation
- Namihana Formation
- Namikata Granodiorite
- Namimatsu Formation
- Namuya Formation
- Nanagochi Formation
- Nanakita Formation
- Nanakura Igneous Complex
- Nanakura Pyroclastic Dikes
- Nanakura stock
- Nanamagari Formation
- Nanamagari Pyroclastic Flow Deposit
- Nanamagarisaka Lava
- Nanamagari Tuff Member
- Nanami Sandstone Member
- Nanane Sandy Mud Member
- Nanane Sandy Silt Member
- Nanaorezaka Formation
- Nanaoyama Formation
- Nanasato Formation
- Nanasato Rhyolites
- Nanasawa Lava
- Nanashigure Volcanic Fan Deposit
- Nanashizawa Diorite
- Nanatani Formation
- Nanatsudaki Granodiorites
- Nanatsumori Lava
- Nanatsumori Volcanic Rock
- Nanatsumori volcano
- Nanayashiro Basalt
- Nanbayama Formation
- Nanbo Formation
- Nanbu Pumice Unit
- Nandaira Pyroclastic Flow Deposit
- Nango Alternation Member
- Nango Formation
- Nango Gravels and Clays Member
- Nango Lava
- Nango Sand Mud Alternation Member
- Nanjo Formation
- Nanjo Group
- Nankai Group
- Nanko Formation
- Nanpudai Granodiorite
- Nansatsu Volcanic Rocks
- Nansei Group
- Nansetsu Subgroup
- Nanso I Terrace Deposits
- Nanso II Terrace Deposits
- Nanso III Terrace Deposits
- Nanso Group
- Nantaisan Volcanic Breccia
- Nantai Tephra
- Nantai volcano
- Nanyo Formation
- Nanyo Formation, Basal conglomerate member
- Nanyo Formation, Lower sandtone member
- NaP
- Naradani Formation
- Naradani Group
- Naradate Formation
- Nara Formation
- Narahara Formation, Tokyo
- Narahara Formation, Kyoto pref.
- Narahara Lava
- Narai Formation
- Narata Formation
- Naratoge Formation
- Narazaka Gravel Bed
- Narikigawa Formation
- Nariki Formation
- Nariki Unit
- Narimasu Formation
- Narimasu Terrace Deposit
- Nari Member
- Narioka caldera
- Narioka Formation
- Narita Formation, Upper
- Narita Group
- Nariwa Group
- Naruiwa Lavas
- Naruiwa volcano
- Narukawa Granite, Ikoma, Nara pref.
- Narukawa Granite, Higashinarukawa, Nara pref.
- Naruko Lacustrine Deposit
- Naruko-Nizaka Tephra
- Naruko volcano
- Naruko-Yanagisawa Tephra
- Narusawa Formation
- Naruse Formation
- Naru Terrace Deposits
- Nashidaira Formation
- Nashiki Debris Avalanche Deposit
- Nashiki Mudflow Deposit
- Nashikino Pyroclastic Rock
- Nashikizawa Tuff Member
- Nashikubo Sandstone and Conglomerate
- Nashino Formation
- Nashinoki Gravel
- Nashino Tuff Formation
- Nasodani Lava
- Nasubida Andesites
- Nasubida Lava
- Nasunogahara Tephra
- Natasyo Complex
- Nate Formation
- Natorigawa Andesite
- Natorigawa Andesite Group
- Natori Group
- Natsuaki Member
- Natsudomari Formation
- Natsui Pyroclastic Flow Deposit
- Natsuyagawa Rhyolite
- Natsuyama Conglomerate Formation
- Nawa Pumice Flow Deposit
- Nawa Pyroclastic Flow Deposit
- Nawashiroda Formation
- Nob
- Nobeyamahara Formation
- Nobi Formation, Kanagawa pref.
- Nobi Formation, Aichi pref.
- Nobiru Tuff
- Nobi Second Gravel Bed
- Noboribetsu volcano
- Noboridani Clayslate Member
- Noborikawa Formation
- Noborito Pumice Group
- Noborito Tuff
- Nocchu Pyroclastics
- Nochino Conglomerate Member
- Noda Formation, Niigata pref.
- Noda Formation, Shizuoka pref.
- Noda Formation, Aichi pref.
- Noda Group
- Nodai Formation
- Nodaira Member
- Noda Member
- Nodani Formation
- Noda Pyroclastic Rocks
- Nodayama Plutonic Complex
- Nodera Gravel
- Nodono Formation
- Nogami Unit
- Nogata Group
- Nogi Formation
- Nogohakusan Granodiorite
- Noguchi Formation
- Noguchi Granite
- Nogurizawa Unit
- Noharadani Formation
- Nohbi Formation
- Noheji Formation
- Nohi Rhyolites
- Nojima Formation
- Nojima Granodiorite
- Nojimazaki Conglomerate Member
- Nojimazaki Tuffaceous Conglomerate Member
- Nojiri Clays Member
- Nojiri Formation
- Nojiri Group
- Nojiriko Formation
- Nojiri Loam
- Nojiri Volcanic Ash
- Nojiro Granite
- Nokogiriyama Dacite Member
- Noma Formation
- Nomashi Formation
- Nomata Belt
- Nomata Formation
- Noma Volcanics Member
- Nomugitoge Volcanic Rocks
- Nomuragawa Basalt
- Nomuragawa Dacite I
- Nomuragawa Dacite II
- Nomuragawa Formation
- Nomuragawa Tuffaceous Conglomerate
- Nomura-L1 Tephra
- Nomura-L2 Tephra
- Nomura Tephra
- Nonoboriyama Granodiorite
- Nonodake Agglomerate
- Nonodake Pyroclastic Member
- Nonokawa Formation
- Nonomata Alternation
- Nonomigawa Pyroclastic Rock Member
- Nonomigawa Volcanic Rocks
- Nopporo Group
- Norihara Dacite Member
- Norikuradake Lava, Aomori pref.
- Norikuradake Lava, Nagano pref.
- Norikura volcano
- Norikura volcano group
- Norikurazawa Diorite
- Norikurazawa Lava
- North body, Orikabe Plutonic Complex
- Northern Chichibu Belt
- Northern Complex, Hyuga Group
- Northern Kyushu Eastern Granites
- Northern Kyushu Main Granites
- Northern Kyushu Western Granites
- Northern Kyushu Granites
- Northern marginal facies, Izumi Group
- Northern Unit, Nakanokawa Group
- Northern Yatsugatake volcanoes
- North Kitakami Belt
- North unit, Kumano Granite Porphyry
- North Unit, Sanbagawa Belt
- North zone, Maizuru Belt
- Noro Basalt
- Nosagake Formation
- Nosegahara Formation
- Nose Pluton
- Noshira Formation
- Noshiro Coastal Dune
- Noshirooki Andesite
- Notegamiyama Basalt
- Notojima Shell Bed I
- Notojima Shell Bed II
- Notono Formation
- Notoro Formation
- Noudani Formation
- Noya Formation
- Noyaushi Formation
- Nozaki Siltstone Member
- Nozawa Lava
- Nozoki Formation
- Nozuchi Formation
- Nozukadake Granite
- Nozuka Lava