Geometric Ice

I came outside the other morning to walk the dog, and spotted this crazy pattern in the ice on my driveway.  I guess there really is something positive that can come out of having a driveway with extremely poor drainage?  What causes this, I have no idea... but I wish I could have had more time to just inspect and enjoy it while it was there.  I guess that's what a camera is good for, huh?  Now you get to enjoy it too.  :)