Mythology: when science falls silent, the gods speak. The ancient Greeks, of course, knew nothing of conglomerate, erosion or tectonic plates — but they possessed a mythology, that operated in "explain everything" mode. According to one legend, the rocks of Meteora arose from the Gigantomachy — great battle between the Olympian gods and the Titans. The giants, in desperate resistance, hurled enormous boulders skyward — and the stones remained standing as mute witnesses to their defeat.
There is another version, more poetic still: the gods themselves raised these pillars as a bridge between earth and Olympus — so that mortals might at least draw closer to the heavens without attempting to scale them. When you behold rocks Meteora in the flesh, especially at dawn, when mist wraps around their bases and summits blaze in the first rays of sunlight — both versions seem quite convincing. And, frankly, no less persuasive than "conglomerate, erosion, 60 million years."