R1
R2
R3
R4
R5
Ra
Raga Conglomerate
Raga Formation
Raichodai Gravel Bed
Raichodai Pyroclastic Fall Deposit
Raidenyama Formation
Raidenyama Unit
, Hokkaido
Raidenyama Unit
, Tokyo
Rakkodake Body
Raku Andesite
Raunenai Formation
Rb
Rc
Rebun Group
Rebun-Kabato Belt
Recent Sand Dune
, Tottori Sand Dunes
Red Pumice Tephra
Refureppu Sandstone Member
Reisenji Volcanics Member
Rekifune Volcanic Rocks
Rendaiji Conglomerate Member
Rendaino Terrace Deposit
Renge Belt
Renge-dake Granodiorite
Renge Metamorphic Rocks
Renkoji Formation
Renkoji Interbedded Formation
Rentaki Formation
Rhyodacitic lapilli tuff
Rhyodacitic welded tuff
Rhyolite lava
Rhyolitic lapilli tuff
Rhyolitic tuff
Rifu Formation
Rifu Granitic Rocks
Rikuchu Group
Rikuzenotsuka Formation
Rinsenji Formation
Rishiri volcano
River Terrace Deposits
, Hidagawa river
Rl
Rm
Rodai Formation
Rokkakuzawa Tuff
Rokugo Formation
Rokumaebashi Formation
Rokumantai Formation
Rokutozawa Formation
Ronden mass
Ronji Formation
Ronji Mudstone Member
Roppoishi Lavas
Roppongi Formation
Rosse Formation
RP
Rt
Ru
Rubeshibe Pyroclastic Flow Deposit
RW
Ry
Ryodenji Formation
Ryodenji Member
Ryokami Formation
Ryokami Unit
Ryokamiyama Chert Unit
Ryoke Belt
Ryoke Granitoids
, Older
Ryoke Granitoids
, Younger
Ryoke Metamorphic Belt
Ryoke Metamorphic Rocks
Ryori Formation
Ryotsu-oki Group
Ryozen Formation
, Fukushima pref.
Ryozen Formation
, Oita pref.
Ryozen Granodiorite
Ryozen Volcanic Rocks
Ryubasan Andesites
Ryugamine Lavas
Ryugamine volcanic body
, Nagano pref.
Ryugamine Volcanic Rocks
, Gifu pref.
Ryugamizu Andesite
Ryugashima Dacite
Ryuhozan Metamorphic Rocks
Ryujin Formation
Ryukawa Formation
Ryukoma Granite
Ryukoma intrusion
Ryukyu Group
Ryuo Lava
Ryuo Volcanic Rocks
Ryusenzan Group
Ryuso Group
Ryuso Sheet
Ryuso Volcanic Rocks
Ryusozan Formation