• b1 Member, U-II Formation, Himenoura Group
• b2 Member, U-II Formation, Himenoura Group
• b3 Member, U-II Formation, Himenoura Group

• Baba Formation
• Babame Dolerite
• Baba-Shirasawa Group
• Baba Tuff
• Baba Tuff Member
• Baba Welded Tuff
• Baitoushan-Tomakomai Tephra
• Baitoushan-Tomakomai Tuff Bed
• Ban-cho Gravels Member
• Banda Basalt
• Bandai AD1888 Debris Avalanche Deposit
• Bandai AD1888 Lahar Deposit
• Bandai-Hayama 1 Pyroclastic Flow Deposit
• Bandai-Hayama 2 Pyroclastic Flow Deposit
• Bandai volcano
• Banded sulphur deposit
• Bando I Tephra
• Bando II Tephra
• Bando2-O1 Tephra
• Bandodani Formation
• Bandokoro Conglomerate
• Bandokoro Lava
• Bando Tephra
• Bangamoriyama Formation
• Bangoya Lava
• Banjin Sand
• Banki Lava
• Bannaguro Sand Bed
• Banno-sawa Pyroclastic Rock and Lava
• Banshoyama Subunit
• Banzan Andesite
• Basal Formation, Mifune Group
• Basal Gravel
• Basal Member, Hashikadani Formation
• Basal tonalite, Hidaka Plutonic Rocks
• Basaltic Volcaniclastics Member
• Basalt Shale Unit

• BB-I
• BB195
• BB-II

• BCVA

• B' craters, Miyakejima volcano
• BDH suite

• Becchari Formation
• Benkeinai Formation
• Benkenemisaki Lava
• Bentenjima Rhyolite
• Bentenjima Rhyolite Member
• Benten-no-hana Lavas
• Bentozawa Formation
• Beppo Formation
• Besshi Eclogite Unit
• Besshi nappe
• Besshi Unit
• Besshi Unit, after Aoki, 2019
• Bessho Formation
• Bessho Sands Member
• Bessho Tephra
• Betsumei Member
• Betsuyama Tuff

• Bg
• Bg-1
• Bg-2
• Bg-3

• Bibai Formation
• Biei Unit
• Bihoku Group
• Biman Gravel Bed
• Bio2
• Biotite I Tephra
• Biotite II Tephra
• Biotite Loam
• Biroku I Tephra
• Biroku II Tephra
• Biroku III Tephra
• Biroku Formation
• Biscuit Pumice 1 Tephra
• Bisei Formation
• Bisho Formation
• Biwajimaoki Formation
• Biwako caldera
• Biwako cauldron
• Biwako Ring Complex

• Black sand, Shonai sand dunes

• B Member, Gumizaki Formation
• b Member, U-II Formation, Himenoura Group
• b Member, U-III Formation, Himenoura Group
• b Member, U-IV Formation, Himenoura Group
• B Mudstone Member

• Bnd2-O1
• Bn-HP1
• Bn-HP2

• Bo
• Bodaijiyama Formation
• Bodaijiyama Volcanics
• Bodaira Tuff
• B-Og
• Bojigadani Formation
• Bojigadani Gravel Bed
• Bokujo Formation
• Bokujokita Andesite
• Bomborigawa Formation
• Bomborigawa Unit
• Bonari Pyroclastic Flow Deposit
• Bonborigawa Formation
• Bonborigawa Unit
• Bonju Formation
• Bonoya Formation
• BoP
• Boroishi Formation
• Bosangawa Clactic Rocks
• Bosangawa Formation
• Bosangawa Tuffaceous Mudstone
• Bosawa Andesite
• Bottom Formation, Maizuru Group

• BP
• BP1
• BP2

• Bs
• Bs-1
• Bs-2
• Bs-3
• Bs-4
• Bs-5
• BSc
• B scoria cone, Miyakejima volcano

• B Tephra
• Btg 1
• Btg 2
• Btg 3
• Btg 4
• B-Tm

• Budo Formation
• Budozawa Formation
• Budozawa Green Tuff
• Buheitoge Formation
• Bunamoribokujo Welded Tuff
• Bunamori Lava
• Bunatai Lava
• Bunera Clay Formation
• Buno Formation
• Busetsu Granite
• Bushi Formation
• Butaijima Basalt
• Butaijima Conglomerate
• Butaitoge Formation

• BW

• By2
• Byk-E
• Byobudake Pyroclastic Rocks
• Byobugaura Formation
• Byobuiwa Formation
• Byobuiwa Lavas
• Byobuiwa Sandstone Member
• Byobuiwa Tuff Member
• Byobuiwa volcanic body
• Byobunoatama Granophyre
• Byobuzan Formation

• BZ