How old are the pryenees?
They are an extension of the Alps and therefore part on the alpine orogeny. The Alpine orogeny is an orogenic phase in the Tertiary that formed the mountain ranges of the Alpide belt. These mountains include (from west to east) the Atlas, the Pyrenees, the Alps, the Dinaric Alps, the Hellenides, the Carpathians, the Balkan, the Taurus, the Caucasus, the Alborz, the Zagros, the Hindu Kush, the Pamir, the Karakoram, and the Himalayas. The orogeny is still ongoing in many places but it started about 65 milion years ago.