Misty Domino Rock

I can't help but wonder how many hundreds or thousands of years until the base of this rock wears away to the point that this topples like a domino.

 

Taken from a hidden part of Praia da Marinha beach which can only be reached (staying relatively dry) at low tide. Nearly dropped my camera and tripod in the water on the way back.

 

Camera Canon EOS 20D + Canon 10-22mm

Exposure 30

Aperture f/9.5

Focal Length 10 mm

B+W 110 Filter + Kenko CPL

 

Thanks for looking!

Done