Hard rock umbrellas protect Turkey's giant stone mushrooms
These towering pillars, some reaching forty meters high, survive only because their heavy basalt caps act as geological shields against the relentless Turkish rain.
The landscape of Cappadocia looks like a forest of stone spires, but it is actually a graveyard of volcanic ash. These pillars, known as fairy chimneys, exist because of a lucky geological layering that occurred millions of years ago. A thick layer of soft, porous ash called tuff was eventually covered by a much harder crust of basalt or welded tuff. As water and wind scoured the valley, they easily stripped away the unprotected ash but hit a wall when they reached the hard rock. This created a protective umbrella effect, where the tough caprock shielded the fragile column directly beneath it while the surrounding earth washed away.