| Ollogoyen, near Estella | Turoniense | — | Comunidad Foral de Navarra |
| Olmo Redondo 5, Villafeliche | Mioceno medio | — | Aragón |
| Olmo Redondo 8, Villafeliche | Mioceno medio | — | Aragón |
| Olmo Redondo 9, Villafeliche | Mioceno medio | — | Aragón |
| Ophiuroidea, Maastrichtian, Puerto de Olazagutia, Spain | Maastrichtiense | Puerto de Olazagutia | — |
| Ophiuroidea, Muschelkalk, Collbato, Barcelona | Ladiniense | Muschelkalk | — |
| Orallo, Villablino Basin, Leon | Namuriense | — | — |
| Orcau 2 | Maastrichtiense inferior | La Posa | Cataluña |
| Orcau 3 | Maastrichtiense inferior | La Posa | — |
| Orcau-1 (Isona) | Maastrichtiense inferior | Conques | Cataluña |
| Orcau-2 tracksite | Maastrichtiense inferior | La Posa | Cataluña |
| Orcera Section, Hornos-Siles Formation | Ladiniense | Hornos-Siles | Andalucía |
| Orrios | Rusciniense | Alfambra | Aragón |
| Orrit | Maastrichtiense inferior | La Posa | Cataluña |
| Os de Balaguer | Santoniense | — | Cataluña |
| Oseja de Sajambre | Ivoriense | Vegamian | Castilla y León |
| Ossa Morena, Los Santos de Maimona Basin | Asbiense | Siphonodendron Limestone | — |
| Ourcrops near village Condemios de Arriba | Cenomaniense superior | — | — |
| Outcrop by AP-7 section, Alcalà de Xivert | Aptiense superior | Benassal | — |
| P1. near the Peña Carazo 4.5 km WSW of Lores | Gediniense | Carazo | — |
| P2. along the Arroyo Arauz 5.5 km W of Lores | Gediniense | Carazo | — |
| P3. 5.5 km W of Lores | Praguiense | Lebanza | — |
| P3. along the Arroyo Arauz 5.5 km W of Lores | Gediniense | Lebanza | — |
| P4. Lebanza Quarry | Siegeniense | Lebanza | — |
| P5. along the northern border of the Requejada Lake | Siegeniense | Lebanza | — |
| P5. quarry along the southern border of the Requejada Lake | Siegeniense | Lebanza | — |
| Padrinàs, bed 2.1 | Zona Tenuicostatum | Padrinas | — |
| Padrinàs, bed 2.2 | Zona Tenuicostatum | Padrinas | — |
| Padrinàs, bed 2.3 | Zona Tenuicostatum | Padrinas | — |
| Padrinàs, bed 3 | Zona Falciferum | Padrinas | — |
| Padrinàs, bed 3.1 | Zona Falciferum | Padrinas | — |
| Padrinàs, bed 4 | Zona Falciferum | Padrinas | — |
| Padrinàs, bed 6 | Zona Bifrons | Padrinas | — |
| Pajar Julián Paricio 1 | Hauteriviense superior | El Castellar | Aragón |
| Pajar Julián Paricio 2 | Barremiense inferior | Camarillas | Aragón |
| Palanca de Noves | Spathiense | Buntsandstein | — |
| Palau | Thanetiense | — | Cataluña |
| Pals Beach Section - uppermost part, Emporda area | Luteciense | Tavertet/Girona Limestone | — |
| Pamplona Basin, NW of Aranguren village, level AG1.3 | Bartoniense | Ardanatz Sandstone | — |
| Pantano 1 | Barremiense inferior | El Castellar | Aragón |
| Pantano 2 | Barremiense inferior | El Castellar | Aragón |
| Papiol 1 | Asbiense | El Papiol | — |
| Papiol, Penedes Valley, Catalonia | Burdigaliense | — | — |
| Paradilla, Santa Lucia Fm | Emsiense | Santa Lucia | — |
| Pardines | Caradoc | El Baell | Cataluña |
| Pareja | Oligoceno superior | Lower Detrital | Castilla-La Mancha |
| Parrales | MP 29 | — | Castilla-La Mancha |
| Partida Poyales (PYH) | Barremiense inferior | Camarillas | Aragón |
| Patch reef, Esla nappe, Cantabrian Mts., Lancara Formation | Toyoniense | Lancara | — |
| Path from Sallent to Montanissell, bed 1 | Zona Ibex | Escales | — |
| Path from Sallent to Montanissell, bed 2 | Zona Margaritatus | Escales | — |
| Path from Sallent to Montanissell, bed 6 | Zona Spinatum | Barre a Pecten | — |
| Path northeast of Maya de Baztan | Emsiense superior | Arizacun Ls | — |
| Pedra Alta section, 4.75 m | Egeense | Estellencs | — |
| Pedra Alta section, 7.2 m | Egeense | Estellencs | — |
| Pedra Alta section, 7.55 m | Egeense | Estellencs | — |
| Pedraforca | Maastrichtiense inferior | Arén | Cataluña |
| Pedraforca area | Santoniense superior | — | Cataluña |
| Pedraforca area | Campaniense inferior | — | Cataluña |
| Pedraforca area | Campaniense superior | — | Cataluña |