CENOZOIC ERA (66,0-0 Ma)
From Greek kainós (new) and zõon (animal)

PALEOGENE PERIOD (66,0-23,03 Ma)
From Greek palaiós (old) and génos (birth)

Main events: the Age of Mammals.

Lifeforms: mammals and plants diversified, and grass appeared. Radiation of placental mammals and birds. In the oceans, complex foraminiferous such as alveolines and nummulites abounded and were populated by early cetaceans.

Paleoenvironment: the opening of the Atlantic Ocean continued and the displacement of the continents, at the end of the period, were already in the current positions The Iberian plate collided with the Eurasia plate, giving rise to the Alpine orogeny and the Pyrenean mountain range. On the current Pyrenees area, the predominant kind of sedimentation was continental with some marine event.

Cobblestones: Vallcebre/Suterranya limestone, Garumnian red sandstone, Cadí /Àger limestone, Baronia grey sandstone, Puigmaçana limestone, Collegats conglomerate