| Berdejo | Titoniense | Ciria | — |
| Bergasa | Oligoceno superior | — | La Rioja |
| Berroberria | Pleistoceno superior | — | — |
| Betete | Barremiense superior | El Collado | Castilla-La Mancha |
| Between Almaden and Almadenejos - AlIV | Caradoc | — | — |
| Between Almaden and Almadenejos - AlIVa | Caradoc | — | — |
| Between Belsué and Lúsera | Bartoniense | Arguis | — |
| Between Ispaster and Ea | Albiense superior | Ubidepea | — |
| Between Masa and Nidaguila | Coniaciense inferior | — | Castilla y León |
| Between Quintanabaldo and Puentedei | Cenomaniense superior | — | Castilla y León |
| Bielba, northern Cantabria (late Mid-Cenomanian) | Cenomaniense medio | Altamira | — |
| Binacua, Bartonian Corals, Belsué-Atarés fm, Pyrenees | Bartoniense | Belsué-Atarés | Aragón |
| Biniamar, Island of Mallorca | Eoceno superior | — | Illes Balears |
| Binissalem, Island of Mallorca | Bartoniense | "Caliza de Peguera" | Illes Balears |
| Biomicrite with benthic foraminifers facies | Santoniense superior | — | — |
| Biosparites with debris of rudistes facies | Santoniense superior | — | — |
| Biscarri, Isona | Maastrichtiense inferior | La Posa | Cataluña |
| Bivalve assemblage, Renales section | Rhetiense | Dolomías tableadas de Imón | — |
| BJ-1, Berdejo | Titoniense | Ciria | — |
| BJ-5, Berdejo | Titoniense | Ciria | — |
| Blancafort | Maastrichtiense inferior | La Maçana | Cataluña |
| Blasi 1, Arén | Maastrichtiense superior | Arén | Aragón |
| Blasi 1b, Arén | Maastrichtiense superior | La Posa | Aragón |
| Blasi 2, Arén | Maastrichtiense superior | La Posa | Aragón |
| Blasi 3, Arén | Maastrichtiense superior | La Posa | Aragón |
| Blasi 3.4, Arén | Maastrichtiense superior | Conques | Aragón |
| Blasi 4, Arén | Maastrichtiense superior | Conques | Aragón |
| Blasi 5, Arén | Maastrichtiense superior | Conques | Aragón |
| Bolloncillos Formation, Tabuenca area, Aragon, Spain | Frasniense superior | Bolloncillos | Aragón |
| Bonares area, Guadalquivir Basin, Huelva | Zancliense | Arenas de Huelva | Andalucía |
| Bonares Cantera d Arcilla | Mioceno superior | Arcillas de Gibraleón | — |
| Bonares, Santa Maria | Plioceno inferior | Huelva | — |
| Bonares-Ambulatorio | Zancliense | Arenas de Huelva | Andalucía |
| Bonares-B | Zancliense | Arenas de Huelva | — |
| Bonares-Casa del Pino | Zancliense | Arenas de Huelva | Andalucía |
| Boniches | Anisiense | — | Castilla-La Mancha |
| Boniches (marine) | Triásico medio | — | Castilla-La Mancha |
| Borobia-1 section (Bo1), level 38, Badules Unit | Piso 4 | Daroca | — |
| Borraca Creek, 3 km south-east of Purujosa village | Solvan | Mansilla | — |
| Borrachon Fm., Celtiberia, Zaragoza, Spain | Tremadoc | Borrachon | Aragón |
| Bosc d'Avets, bed 1, Sallent | Zona Ibex | Escales | — |
| Bosc d'Avets, bed 2, Sallent | Zona Davoei | Escales | — |
| Bricia | Pleistoceno superior | — | — |
| Bruguers-Gavà | Lochkoviense | Olorda | — |
| Bryozoan, Miocene, grand Canary Island | Aquitaniense | — | Canarias |
| Brèches rouges de Carboneras, Bathyal, Late Miocene, SE Spain | Messiniense | Brèches rouges de Carboneras | — |
| BS2, Baños de la Hedionda | Cenomaniense superior | Capas Blancas | — |
| Buena Pinta Cave | Pleistoceno medio | — | — |
| Bunker de Valdecebro | MN 13 | — | Aragón |
| Buntsandstein Iberian Cordillera Aragonian | Anisiense | Calcena Lutites and Sandstones | Aragón |
| Buñol (Cerro de la Cruz) | Burdigaliense | — | Comunitat Valenciana |
| Buñol (Daams Collection) | Mioceno | — | Comunitat Valenciana |
| Bóveda, Álava | Campaniense superior | Vitoria | — |
| Cab-1, La Cabaña | Cenomaniense superior | La Cabaña | — |
| Cab-2, La Cabaña | Cenomaniense superior | La Cabaña | — |
| Cabana de Gori | Maastrichtiense inferior | Lower Red Garumnian | Cataluña |
| Cabana de Gori-2 | Maastrichtiense inferior | Conques | Cataluña |
| Cabana del Llúcio-1 | Ypresiense | Corçà | — |
| Cabezo Agudo Fmn, Cordillera Iberica Oriental | Givetiense | Cabezo Agudo | Aragón |
| Cabezo Colorado | Piacenziense | Espiritu Santo | — |