From Chris Kirtley:

Re: Hexagon on Saturn mystifies astronomers (March 27): By an interesting coincidence I was walking at Burleigh Heads yesterday, where there is a great example of six-sided volcanic basalt. I wonder if a similar mechanism might be responsible for the Saturn phonomenon?

http://www.gold-coast-beaches.com/17.shtml

Chris Kirtley MB ChB, PhD
Kangaroo Point
Queensland, Australia